Hi, I'm Peter Cullinan

I help you implement the GTM Operating System to MOVE your business further, faster.

GTM Operating System
GTM OS Certified Partner

About Me

I’m a Fractional CMO and Go-to-Market (GTM) advisor with more than 25 years of experience helping founders, CEOs, and PE-backed B2B software companies build marketing functions that drive measurable revenue. I specialize in turning fragmented marketing efforts into structured, repeatable demand generation systems that create predictable pipeline and sustainable growth. My work focuses on health tech, digital health, regulated B2B SaaS, compliance-heavy software, and Seed to Series B startups.

Through GoTo Marketing, I work alongside leadership teams to uncover why marketing isn’t consistently translating into pipeline. In most cases, the challenge isn’t a lack of activity—it’s a lack of alignment, ownership, and operational discipline across the revenue engine. I help connect marketing with sales, product, RevOps, and customer success, building the processes, metrics, and accountability needed to create a high-performing GTM organization. My approach combines strategic leadership with hands-on execution, ensuring plans don't just look good on paper—they get implemented and deliver results.

My expertise spans GTM strategy, demand generation, marketing operations, RevOps, team design, AI and MarTech optimization, attribution, dashboards, and executive coaching. Whether I’m building a marketing function from the ground up, scaling an existing team, or helping leadership navigate growth challenges, my goal is always the same: to create a connected, accountable marketing system that delivers predictable revenue, supports long-term growth, and restores confidence in marketing as a true business driver.

15 Reasons Why Your GTM Is Broken

Business is relying on heroic sales players and not plays

Business is relying on heroic sales players and not plays

Sales, Marketing, and Customer Success are out of sync

Sales, Marketing, and Customer Success are out of sync

You can't predict and forecast revenue for the next two quarters

You can't predict and forecast revenue for the next two quarters

Heavy discounting and feature wars are eroding your value prop

Heavy discounting and feature wars are eroding your value prop

Your customers love you, but can't quantify their ROI at renewal time

Your customers love you, but can't quantify their ROI at renewal time

You can't prioritize or say no to new initiatives

You can't prioritize or say no to new initiatives

Your team is not aligned on an executive strategy

Your team is not aligned on an executive strategy

Your churn is killing your business

Your churn is killing your business

Your competitors are winning more market share

Your competitors are winning more market share

You are THE last to enter a deal cycle

You are THE last to enter a deal cycle

Your team is reactive, not proactive

Your team is reactive, not proactive

You want to go up-market but the customer base is SMB

You want to go up-market but the customer base is SMB

Your analyst relations are weak, at best, to drive material influence

Your analyst relations are weak, at best, to drive material influence

Your point of view is not differentiated with your product

Your point of view is not differentiated with your product

You are struggling to go from a product to platform company

You are struggling to go from a product to platform company

The GTM Operating System Can Help You Fix It.

Our GTM Operating System (O.S.) is a proprietary eight-pillar framework designed to build and guide Go-to-Market strategy for B2B teams. Think of it as a blueprint and a map that connects strategy to execution and helps teams achieve alignment across functional silos.

How do you give your team clarity, alignment and trust?
Which GTM metrics drive the health of your business?
How else can you upserve your customers?
How do customers experience your ROI?
GTM Operating System Framework
Where can you grow the most?
Which product(s) create the highest customer value?
How will you engage your customer with a differentiated POV?
Which GTM motions get you to your revenue go faster?

The Solution

Our GTM Operating System framework helps you address these challenges with practical solutions that get results.

Define your ICP & prioritize segments

Define your ICP & prioritize segments

Stop chasing the wrong customers.

Build a roadmap around your highest-value products

Build a roadmap around your highest-value products

Focus on what drives real revenue.

Develop a differentiated point of view

Develop a differentiated point of view

Stand out instead of competing on price.

Implement a GTM motions playbook

Implement a GTM motions playbook

Repeatable plays that actually work.

Accelerate ROI & time-to-value

Accelerate ROI & time-to-value

Turn customers into advocates, fast.

Focus on data-driven customer and product insights

Focus on data-driven customer and product insights

Fuel NRR growth.

Create an executive GTM dashboard

Create an executive GTM dashboard

Full visibility, no surprises.

Align teams with clarity & trust

Align teams with clarity & trust

Move faster, execute better.

What GTM Leaders are Saying

"From defining what Go-To-Market (GTM) actually is, to sharing insights; processes; and frameworks for anybody to jump in, invite the teams and GETTING ALIGNED"
Leandro Bark
Leandro Bark
CEO of GTM Experts Pte Ltd
"The GTM Operating System is the most powerful model on the market, and I’d love nothing more than to see it become the go-to standard for all GTM leaders."
Mary Kay Evans
Mary Kay Evans
Chief Marketing Officer
"From ICP Scoring, understanding what a relevant market vs total addressable market is to how to prove ROl I thought every pillar was full of insights! I would recommend this to any founder or professional who wants to stay ahead!"
IOANNA MANTZOURIDOU
IOANNA MANTZOURIDOU
Co-Founder & CEO, Dextego
"The GTM O.S. has completely transformed the way we work. Our team is more aligned than ever, and with the GTM O.S. frameworks, we’re making better decisions and executing more effectively."
Clelland Green
Clelland Green
CEO Benepath

Let's Work Together

I can help you implement the GTM Operating System in your business to achieve faster growth, better alignment, and improved go-to-market performance.

  • Implement the GTM Operating System in your organization
  • Align your sales, marketing, and customer success teams
  • Create a data-driven GTM strategy that drives growth
  • Develop a clear roadmap for your GTM transformation