mark_colgan -- profile

Mark Colgan

B2B Outbound Architect & GTM Engineer

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B2B Outbound Architect & GTM Engineer

18 years of experience and context. 250+ companies. Now I build the infrastructure.

Strategy, stakeholder management, and the technical builds to back them up. Most GTM Engineers have one. I have all three.

Path 01
Who I Am & Why Now
The person, not the CV. Who I am, how I'm wired, and why I'm ready to go deep with one company.
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Path 02
Where I've Been
Recruitment, marketing & RevOps, a gap year, outbound, and AI-native GTM. 18 years, every era built on the last.
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Path 03
The Cool Stuff I've Built
A selection of the workflows, tools, and systems I've built. Some client work is confidential, so this is what I can show.
dashboard playbook campaign gen stakeholder map gethired.guide +14 more
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Path 04
Content & Speaking
Videos, podcasts, conference stages, training courses, and content for 10+ B2B brands.
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18
Years working in sales and marketing.
250+
Companies worked with across B2B.
10,000+
Hours mastering outbound sales.

Who I Am & Why Now

The person, not the CV. Who I am, how I'm wired, and why I'm ready to go deep with one company.

Lisbon, Family & How I Got Here

I'm originally from the UK, but I've lived in Lisbon for over six years now. I got here the way most good things in my life have started: with a loose plan and a willingness to figure the rest out on the ground. I'd been working remotely and moving between cities for a few years, and Lisbon was supposed to be the place where I slowed down for a bit. Two months later, the world locked down, and the decision was made for me. A year after that, I met my wife. Two years ago, we got married. And in October 2025, our son arrived. Nine months in, it's everything people tell you it will be. The laughter, the joy, the 4am wake-ups where you're expected to function like a normal human being by 8am. Parenthood is the ultimate lesson in building something from scratch with no instruction manual and making it up as you go.

How I'm Wired

That instinct runs through everything I do. I'm an organised Type-A personality, the sort of person who has the flights and hotel booked before the holiday conversation is finished, and whose Tupperware collection is genuinely a source of pride. My wife is Brazilian, and her relationship with time is best described as philosophical. That contrast keeps things interesting, but it works because the structure I build around everything else gives me the space to relax into her pace when it matters. I don't organise things because I like control. I organise things because it means I can be fully present when I stop.

That same energy shows up with people. In any group, I'm the one making introductions, connecting people who should know each other, and looking for where I can add value before anyone's asked me to. It's instinctive. When I'm working with someone new, there's a professional version of me that shows up first, but it doesn't take long before the more relaxed side comes through. I'm high energy, I move fast, and I'm direct. I've been my own boss for years, and nobody's making me open the laptop every morning. I do it because I genuinely enjoy going from nothing to something, getting it live, and watching people use it.

That directness extends to how I treat people. I'd rather give someone an honest answer they can actually work with than a comfortable one that wastes their time. I don't make promises I can't keep, and I don't pretend to have answers I don't have. Everyone knows more about their own situation than I ever will, and I'd rather start from that position than assume I know best.

Type-A Builder Warm & Direct Super Connector Weekend Shipper

Outside of Work

I live on a golf course, which sounds great for somebody who loves golf. I keep trying to automate enough of my work to free up the calendar for more rounds, but the freed-up time just gets filled with more building. I'm aware of the irony.

I enjoy going to the gym, mostly to stay healthy, but it's also a moment away from screens where I get to focus on myself. I'm a keen traveller, I really enjoy socialising with friends, and I love hosting, whether that's a barbecue in the garden or a full roast dinner for a table of people. There's something about watching someone experience a proper roast for the first time that never gets old.

Sundays are when I take over the kitchen and cook my lunches and dinners for the week ahead. The whole afternoon spent building something from scratch, the worktops covered in ingredients and containers. I think you can see the pattern here.

Golfer UK Citizen Portuguese Resident Father

Fun Facts

Living in Lisbon is fantastic, and being surrounded by nature is just good for the soul. But there's one thing I dearly miss from the UK, and that is a proper pub. The kind with low ceilings, worn carpet, and a nice cold pint (or zero-alcohol beer), catching up with friends and filling the room with laughter. Whenever I'm back in London for work or meetings, a classic pub visit is always on the itinerary.

  • I was once a child model for children's diarrhoea tablets. I've got photos.
  • I once fooled London into thinking a Fox Cafe was about to open. That's true. Look it up.
  • After selling my agency, I spent 10 days on a deserted island in Panama. By choice.

Why Now

Consulting has been good to me. I genuinely enjoy working with my clients, and the variety across hundreds of industries has taught me more than any single role ever could. But my typical engagements run between one and three months, occasionally longer, and I'm acutely aware that I can only build so much by myself.

I want to be part of a bigger team and have a bigger impact. There's a ceiling to what one person can do, no matter how many systems you build or how efficiently you operate. I want to go deep with one company, understand the business properly, and build something that compounds over time rather than handing over and starting again every quarter.

The Right Moment

Having a son has sharpened that. It's made me rethink what I'm building and what I'm working towards. The consulting life has given me freedom and flexibility, but what I want now is to invest in something bigger than the next engagement.

The timing is also right because the GTM Engineer role has finally caught up to what I've been doing. Two years ago, there was no job title for the person who builds the outbound infrastructure, designs the playbooks, implements the AI layer, connects it all to pipeline, communicates across departments, enables the front-line sellers, and plans the strategic vision. Now there is. The work I've been doing as a consultant, across hundreds of companies, is exactly what companies are hiring GTM Engineers to do internally. The difference is that I've been doing it longer than most people have known the role exists.

The Gap I've Seen

Through my work with Bootprint (formerly Clay Bootcamp), coaching over 50 GTM engineers and watching hundreds more come through the programme, I've seen a clear gap in the market. Many GTM engineers are brilliant with the tooling and the systems, but they lack the context that makes those systems actually work. They haven't sat in a seller's seat. They haven't beaten quota, and they haven't missed targets and had to figure out why. They haven't had to justify and defend their activity to a manager breathing down their neck. They haven't navigated cross-functional relationships or presented strategy to a room of senior stakeholders who need to be convinced, not just informed.

I've done all of that. The selling, the coaching, the stakeholder management, the building. And I want to bring all of it to a company that's on a mission, where the work I do compounds into something meaningful rather than resetting every few months.

Where I've Been

From recruitment floors to AI-native GTM engineering. Every era built on the last.

Current Era Yellow O
Dec 2022 – Present

After taking a break from selling my agency, I decided to begin consulting again with a focus on outbound prospecting and helping companies generate more pipeline.

Yellow O
B2B Sales Consultant|Full-time|Remote
I design, build, and hand over AI-enabled outbound systems for B2B SaaS teams. From Seed to Series D, I work with founders, VPs of Sales, and CROs who want a system their team can run, not a dependency on a consultant.
November 2025: The Shift

When Claude Opus 4.5 came out, I realised consulting would never look the same again. What used to take a team of three and several weeks could now be built by one person in days. I started codifying my own IP into Claude Code skills and plugins, building the workflows, tools, and automations that turned my advisory into a hands-on engineering practice. I repositioned Yellow O to offer AI-enabled outbound systems, not just strategy and coaching. The tools you can see on the Cool Stuff I've Built tab are the result.

Three services. One diagnostic tells us which.

Diagnose: Outbound Diagnostics

I dig into everything: who you're targeting, what you're saying, how your tech stack is actually being used, how your reps spend their day, and whether any of it is joined up. You get a written report with a prioritised list of what to fix and in what order. Typically 2-3 weeks.

Implement: Playbook Design & Build

I design and build the playbook, the messaging, the signal-based plays, and the AI workflows your team needs to generate pipeline consistently. Everything is documented, handed over, and built so your team can run it without me. Typically 4-6 weeks.

Enable: Enablement & Advisory

I train your reps to actually execute the playbook. Cold calling, messaging, objection handling, AI-assisted research, and how to use the tools you're paying for. Group workshops, one-on-one coaching, and written coaching notes. Typically 2-6 weeks.

Key Results
$300K
Pipeline generated within 2 weeks of campaign launch
100%
Of coached reps exceeded target and unlocked accelerator tier
295%
Increase in net new MRR
92-94%
Reduction in speed-to-lead
4.7%
Reply rates on signal-based campaigns, up from under 0.5%
26%
Increase in qualified opportunity rates
67%
Reduction in no-shows
+2/rep
Additional meetings per rep per week across a 5-rep team
2 min
Research time per account, down from 20 minutes
50%
More accounts managed per rep with no additional headcount
Companies I've worked with
Company logos: Moss, HiBob, Clay, HubSpot, Cognism, Cytidel, Tenor, ZoomInfo, Sampl, ThreatAware, Kinsta, CloudNC, Adthena, RevivedUp, GatherContent, ShipUp, Sendoso, Appraisd, Metomic, YunoJuno, Groove, Uberall, Demodesk, Klaviyo
Side Projects & Advisory

As you can tell by now, I live and breathe outbound. Here are some of the projects I've been involved in whilst running Yellow O.

OutboundSalesTools.com
Founder
Curated directory of outbound sales tools. Reviews, comparisons, and stack recommendations for SDRs, AEs, and RevOps teams building their outbound infrastructure.
Sep 2025 – Present
GTM Connections
Connector
Connecting GTM Engineers, sales leaders, and founders working at the intersection of AI and outbound. Curated introductions and community building.
May 2026 – Present
Clay
Claymaker
Official Claymaker for one of the most important tools in the GTM Engineer stack. Building enrichment workflows, waterfall sequences, and signal-based automations for Clay customers.
Feb 2024 – Present
Bootprint (prev Clay Bootcamp)
Mentor
Mentoring GTM Engineers and RevOps practitioners through the Bootprint programme. Coaching on Clay workflows, enrichment architecture, and outbound systems design.
Feb 2024 – Present
Twain
Product Advisor
Advising on product direction for Twain's AI-powered sales messaging platform. Bringing practitioner insight from hundreds of outbound campaigns to shape the product roadmap.
Feb 2024 – Present
GrowthMentor
Mentor
One-on-one mentoring for founders and sales leaders on outbound strategy, cold email, and GTM infrastructure. Over six years on the platform.
Jan 2019 – Present
ScaleWise
Coach
Coaching B2B sales teams through ScaleWise's expert network. Focused on outbound prospecting, pipeline generation, and rep enablement.
Aug 2020 – Present
PORTABL.co (Techstars '18)
Advisor: Marketing
Marketing advisor to this Techstars-backed startup. Guided early go-to-market strategy and positioning.
May 2018 – May 2019
Era 04 Outbound
Jun 2019 – Dec 2022

Where outbound became the thing.

TaskDrive was the turning point. This is where outbound stopped being something I did as part of a broader role and became the entire focus. From there, everything accelerated: co-founding and selling a podcast guest booking agency, coaching over a thousand SDRs at Sales Impact Academy, and building the foundation of what Yellow O would become.

Sales Impact Academy
Outbound Prospecting & Cold Email Coach|Aug 2020 – Feb 2024
Coached the Outbound Prospecting and Cold Email courses. Over 1,000 SDRs, AEs, and Sales Leaders across hundreds of B2B companies over three and a half years. This is where the coaching methodology was tested at scale.
Speak On Podcasts
Co-Founder (Exited 2022)|Jun 2020 – Dec 2022
Co-founded a podcast guest booking agency for B2B founders and executives. Built it, grew it, and exited in 2022. The outbound muscle that built this business was the same one I was teaching clients to use.
TaskDrive
General Manager|Jun 2019 – Jul 2020
General Manager of a 100-person lead research agency. This is where I learned what prospecting looks like at scale, and more importantly, what breaks when you try to systematise human research across a large distributed team.
Era 03 Yellow O (v1)
Aug 2017 – Jun 2019

After travelling, I came back and started consulting under the Yellow O name for the first time. The focus was CRM implementation and marketing automation, helping B2B companies get their tech stack working properly. This was the period where I realised I could work fully remotely and build a consulting practice without being tied to an office or a single city.

Yellow O
CRM & Marketing Automation Consultant|Aug 2017 – Jun 2019
Consulted on CRM implementation and marketing automation for B2B companies. Built the systems that connected sales and marketing workflows, and proved the model of running a consulting practice entirely remotely.
The Break Gap Year
Oct 2016 – Aug 2017

South America and Southeast Asia

After the marketing era and before outbound took over, I took a year to travel. Colombia, Peru, Bolivia, Chile, Argentina, Brazil, Thailand, Laos, Cambodia, Vietnam, Hong Kong, Philippines, Indonesia, and Australia. A different kind of education, but the instinct to go and figure things out on the ground is the same one that shows up in everything else.

Era 02 Marketing & RevOps
Oct 2012 – Oct 2016

CRM, Automation & the Revenue Engine.

The titles said "marketing," but the work was CRM integrations, marketing automation, and RevOps before RevOps was a title. I worked closely with the sales team, building the infrastructure that connected marketing activity to pipeline. This is where I learned the plumbing that most GTM Engineers inherit but few truly understand from the ground up.

The Local Data Company
Digital Marketing Manager|Dec 2014 – Oct 2016
Guided prospects from awareness through to qualified leads for the sales team. Built interactive content campaigns and ran data-driven marketing operations that connected marketing activity directly to pipeline.
Procserve
Digital Marketing Manager|Aug 2013 – Dec 2014
Owned brand awareness and lead generation across digital channels. Procserve was later acquired by Basware, so this was my first experience of marketing through a company transition.
2BM Ltd
Online Marketing Manager|Oct 2012 – Aug 2013
Built the multichannel online marketing strategy from scratch, positioning 2BM's thought leaders and driving lead generation campaigns tied directly to sales outcomes.
Alongside

The Drinks Box (Sep 2016 – Jun 2020)

My family and I converted a 1970s Rice double horse trailer into a mobile bar, available for weddings, corporate events, private parties, and public events. A different kind of hustle, but the same entrepreneurial instinct. We sold the business in 2020.

Era 01 Recruitment
Jun 2008 – Oct 2012

Where it all started.

My first roles were in recruitment, but they weren't the "post an ad and wait" kind. I had to hunt for the work and then fill the positions. Business development was baked in from day one: picking up the phone, going door-to-door, visiting business parks, building relationships with hiring managers before I'd earned the right to fill their roles. This is where I learned to sell, prospect, and manage a pipeline long before I knew those words had a methodology behind them.

Experian
Recruitment Partner|Oct 2011 – Oct 2012
In-house recruitment for Experian's Credit Services and Marketing Information Services divisions. First exposure to enterprise-scale hiring and cross-functional stakeholder relationships.
SF Group
Recruitment Consultant (Finance Division)|Nov 2010 – Oct 2011
Moved into finance recruitment, placing qualified accountants across Nottinghamshire and Lincolnshire. Larger fees, longer sales cycles, and more complex stakeholder management.
Hays
Recruitment Consultant|Jun 2010 – Oct 2010
Returned to recruitment after university. Recruiting call centre and customer service roles in Nottingham, sharpening the phone skills that would underpin everything that came next.
Hays
Recruitment Consultant (Placement Year)|Jun 2008 – Sep 2009
Started in agency recruitment, learning the fundamentals of outbound prospecting, cold calling, and pipeline management. This was where the muscle memory for high-volume outreach began.

The Cool Stuff I've Built

A selection of the workflows, tools, and systems I've built. Some client work is confidential, so this is what I can show.

Client Workflow

Account Research and Signal Prioritisation Dashboard

Scores and ranks accounts against a client's ICP using binary must-have gates, weighted signal scoring, and real-time enrichment. Generates outreach briefs per account so reps know who to call, why, and what to say.

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Client Workflow

Custom Interactive Outbound Sales Playbook

A full outbound operating system with an AI layer on top. 15 sections covering ICP, personas, messaging, sequences, signals, and objection handling. Query it, don't read it. Reps ask a question and get the answer in context.

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Client Workflow

Inbound Lead Enrichment

Automated pipeline from demo request to scored, enriched sales notification. Form submission triggers enrichment via GetLeads, ICP scoring against must-have gates and buying signals, then drops a ready-to-act briefing straight into the rep's inbox. No manual research, no CRM needed.

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Client Workflow

Mobile Number Waterfall Enrichment

One-click mobile number enrichment from Salesforce. Six-source waterfall (Apollo, ZoomInfo, Lusha, Prospeo, Ocean, Amplemarket) ordered by cost, GDPR-compliant, stops at the first valid result. Built because 80% of booked meetings came from cold calls and reps were wasting time searching across tools manually.

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Client Workflow

Pre-Discovery Call Research

Single-input research workflow that turns a prospect name and company domain into a visual prep brief, CRM note, and tailored discovery questions.

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Client Workflow

Stakeholder Mapping & Enrichment

Maps the full buying committee for any account from a single company URL. Enriches each stakeholder with phone and email, groups by department, and matches to buyer personas with pain points and messaging angles. One-click contact creation in HubSpot. Replaces 30-45 minutes of manual research per account.

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Client Workflow

Cold Email Message Drafter From LinkedIn/HubSpot

Generates personalised cold emails using prospect research, signal context, and 28 validated frameworks. Quality validation built in. Two entry points: a LinkedIn bookmarklet for reps browsing profiles, or a direct API call from HubSpot. No manual research, no "looks good to me" reviews needed.

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Marketing/Content

GTM Digest KB

300+ curated entries from GTM newsletters and expert content. Each entry structured with summary, key insight, full detail, and advisory notes. Scenario-matched and tagged for instant retrieval during client conversations.

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Marketing/Content

The Outbound Sales Diagnostic

Public-facing diagnostic built from anonymised recommendations across five client engagements. Walks teams through targeting, messaging, sequences, tech stack, and SDR execution to find exactly where outbound is broken.

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Marketing/Content

Outbound Sales Tools Directory

100+ sales tools reviewed and catalogued. The reference site I built because I kept getting asked "which tool should I use?" and got tired of repeating myself. Each tool gets a quick take, pricing, category mapping, tutorial videos, and related tools.

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Marketing/Content

Outbound Campaign Generator

Prospect-facing campaign plan generated from a single website URL. Three ICPs, priority personas, buying signals, a full campaign plan table, 10 real prospects sourced from Amplemarket, and a 12-step multi-channel sequence with draft emails, cold call scripts, voicemails, and LinkedIn messages.

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Marketing/Content

Signal GTM Generator

Enter what you sell and who you sell it to, get five tailored buying signals you can start tracking to generate more pipeline. Signals mapped to observable events that create buying intent for your specific product and market.

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Marketing/Content

Problem-Focused Message Generator

Enter your product and target persona, get messaging angles that lead with problems, not features. Generates pain-point language that mirrors how buyers actually describe their challenges, not how vendors pitch them.

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Marketing/Content

Yellow O Resources Centre

Gated resource hub with 20+ free outbound guides, worksheets, and tools. Email OTP auth, automatic lead enrichment on signup via Amplemarket, ICP scoring, and HubSpot contact creation with score writeback. Not just a content library -- a lead capture and qualification system.

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Weekend Builds

Stuff I build because I can't stop building.

Weekend Build

GetHired.Guide

Free tool that matches your CV to any job description, scores your profile across five dimensions using AI, and finds relevant contacts at the company so you can reach out directly. Also includes a seven-part mini course on job searching properly. Built for a friend. Stayed free.

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Weekend Build

GTM Connections

Web app for organising curated networking events for GTM professionals in Lisbon. Event listings, smart RSVPs, automated email sequences, attendee profiles sent before the event so everyone comes prepared, and an admin dashboard. No traditional database or backend.

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Weekend Build

dudatranslates.com

Professional website for a certified translator and interpreter based in Lisbon. 49 static pages, five content collections, SEO with JSON-LD structured data, WhatsApp as primary contact channel, and a password-protected referral system. Three inbound enquiries within the first week of launch.

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Weekend Build

Lead Generation Diagnostics Tool

Diagnostic tool for growing companies. 24 questions across four pillars (Culture, People Frameworks, Org Structure, Inclusion & Diversity), scored and banded with personalised recommendations, benchmarks, case studies, and a downloadable PDF report.

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Weekend Build

Family Travel Planner App

Shared family calendar for staying connected across countries. Year, month, and agenda views showing when we're travelling, when people are visiting, and when we're free. Built because coordinating across multiple countries shouldn't require a group chat.

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Weekend Build

I Ship Because I Love Building

Most of these started as "I wonder if I could..." on a Saturday morning and were live by Sunday night. That's what Claude Code enables: going from idea to production in a weekend.

Content & Speaking

Videos, podcasts, conference stages, training courses, and content for 10+ B2B brands.

1.5K
YouTube subscribers
160+
Videos published
50+
Podcast appearances
10+
Brands I create content for
Brand Content

Content Creation

I create video content, tutorials, and thought leadership for B2B SaaS brands. From scripting to delivery, I help companies tell their GTM story to the right audience.

ZoomInfo
ZoomInfo
Clay
Clay
Amplemarket
Amplemarket
Freckle
Freckle
Twain
Twain
Prospeo
Prospeo
YouTube

1.5K subscribers, 160+ videos

Long-form content on outbound prospecting, sales technology, signal-based selling, and building GTM infrastructure. Real strategies from real client work, not theory from a textbook.

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How to Build a Signal-Based Outbound System
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Cold Email Teardown: What Works in 2025
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Building Outbound Infrastructure with AI
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The GTM Engineer Role Explained
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Podcasts

50+ guest appearances

Regular guest on B2B sales and marketing podcasts. Topics span cold outbound, signal-based selling, AI in sales development, and building GTM infrastructure.

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Why Anthropic Still Hires Human SDRs
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AI in Sales: Practical Framework
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What's Working in B2B Outbound
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Fix Your Sales Process & Coaching
Speaking

Conference talks & workshops

10+ conference presentations. Outbound playbook design, cold email methodology, AI-native GTM engineering. Keynotes and breakout sessions at industry events.

Training

Sales Impact Academy

Built structured training content reaching thousands of SDRs and AEs. Courses covering outbound fundamentals, cold calling frameworks, prospecting methodology, and sales engagement best practices.

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How is Mark different from other GTM Engineer candidates?
What results has Mark delivered for clients?
Walk me through how the account prioritisation dashboard works
What tools and tech stack does Mark work with?
Tell me about Mark's career journey
What has Mark built with Claude Code?
How does Mark approach cold email?
Why is Mark looking for a full-time role?

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