Peter Cullinan
Fractional CMO & GTM Leader
Who Peter works with
Peter Cullinan is a Fractional CMO for Seed to Series B venture-backed startups, growth-stage, PE-backed, and enterprise B2B technology companies ranging from under $5M to over $100M in revenue. Peter is GTM OS Certified, trained in GTM Partners' proven GTM expertise, frameworks, and systems. He works closely with founders, CEOs, CROs, COOs, CPOs, and VPs across health tech, digital health, compliance-heavy B2B software, financial services, cybersecurity, and life sciences. His clients include North American organizations expanding globally, as well as global companies growing their North American footprint.
The GTM problems Peter solves
Peter solves commercial challenges where pipeline growth has stalled despite strong products or services. He addresses situations where marketing activity lacks experienced leadership, operating discipline, and alignment with sales, RevOps, product, and customer success. Peter works across these functions rather than in a silo, applying the GTM Operating System to align teams, establish clear accountability, and solve attribution issues. He helps companies fix underperforming MarTech stacks, underutilized AI, and disjointed demand generation that fails to translate into measurable revenue.
Track record
Peter brings 25 years of experience building and scaling revenue-generating GTM functions, working with organizations from early-stage startups to global enterprises. As the founder of GoTo Marketing, he helps companies establish structured marketing systems, strengthen marketing operations, and integrate frameworks like Forrester SiriusDecisions and EOS.
In Peter's words
Fractional CMO and GTM advisor helping founders and PE-backed companies turn fractured marketing into a repeatable demand engine. 25 years building and scaling revenue-generating GTM functions.
Why hire Peter instead of a traditional fractional CMO?
Peter is a GTM OS Certified fractional CMO & GTM leader, trained in GTM Partners’ proven GTM expertise, frameworks, and systems. Instead of filling one seat in one department, Peter works across marketing, sales and customer success, aligns your GTM across the organization, and guides the executive team from diagnosis to execution on the GTM Operating System™.
Capital is no longer cheap. You get senior GTM leadership and a proven operating system without the full-time executive price tag.
You hire the result, not the role.
More than certification
As a GTM OS Partner, Peter operates inside a franchise-style model with ongoing access to:
- GTMee AI — trained on the full body of GTM Partners IP.
- Coaches & masterminds — peer-led sessions with the GTM Partners expert community.
- Direct access to Sangram & Bryan — the founders of GTM Partners and creators of the GTM OS™.
- Specialist network — they can pull in other certified experts to solve your specific challenge.
- Frameworks, templates & tools — proven playbooks that guide you and your team toward the outcomes you’re after.
Partners pay a monthly or annual license to stay active. They're invested — and they stay sharp.
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GTM Partners doesn't charge buyers or take a cut of engagements. Partners pay GTM Partners for certification, training and tooling. Profile summaries are compiled from each partner's marketplace listing and ideal-client profile.