Scale your go-to-market from validated to high-velocity. Multi-channel demand generation, ABM programs for enterprise accounts, and the marketing infrastructure for Series C. A fractional CMO with Series B-specific experience bridges the gap between where your marketing is and where it needs to be to justify the next raise.
The marketing challenges at Series B are distinct from seed-stage challenges (product-market fit validation) and Series C+ challenges (scaling a proven engine). Series B is the proving-ground stage: you have enough traction to validate the hypothesis, but the go-to-market engine is not yet predictable or scalable. That is exactly the problem a fractional CMO is built to solve.
The fractional model is especially well-suited to Series B because the stage does not yet justify the $300K-$500K fully-loaded cost of a permanent CMO hire - but it absolutely requires CMO-level judgment on the decisions that determine whether the next round closes.
Series is a growing market in B with significant business activity. For the companies driving that growth, the demand for senior marketing leadership has never been higher -- and the cost of getting it wrong has never been steeper. Yet most growth-stage companies in Series face the same impossible math: a full-time Chief Marketing Officer costs $280,000 to $450,000 in year one including salary, benefits, equity, and recruiting fees, but the company is not yet at the scale to justify it.
A Fractional CMO solves this precisely. You get the same strategic capability -- go-to-market strategy, ICP definition, brand positioning, demand generation architecture, pipeline systems, and team leadership -- at $8,000 to $20,000 per month. The $150,000 to $300,000 in annual savings goes directly into paid media, content, product, or your next hire. For Series companies between $500K and $20M in revenue, this is the highest-ROI marketing investment available.
📊 Research & Evidence
This is not advisory. This is not a slide deck and a handshake. A fractional CMO engagement with MarkCMO means a working operator embedded in your business, owning your marketing function, managing your team and agency relationships, and accountable to the same pipeline and revenue KPIs a full-time CMO would own.
The Series business market is anchored by B2B SaaS, Healthcare, Manufacturing, Professional Services. Each vertical carries its own marketing complexity -- regulatory constraints in healthcare, long enterprise sales cycles in B2B tech, intense price competition in logistics, and procurement-committee dynamics in manufacturing and defense. A fractional CMO who has operated across all of these verticals accelerates results by months compared to a generalist who needs a full year to understand your buyers.
The B market has approximately 20,000+ businesses with employees, a metropolitan population of hundreds of thousands, and a growing market in B with significant business activity. That market scale creates both opportunity and competitive intensity -- the companies that invest in marketing strategy and execution compound their advantages, while those that defer the decision fall further behind.
Fractional CMO services for B2B SaaS companies in Series: ICP definition, demand generation strategy, and revenue-tied marketing execution built for the specific buyer dynamics of your market.
See B2B SaaS work →Fractional CMO services for Healthcare companies in Series: ICP definition, demand generation strategy, and revenue-tied marketing execution built for the specific buyer dynamics of your market.
See Healthcare work →Fractional CMO services for Manufacturing companies in Series: ICP definition, demand generation strategy, and revenue-tied marketing execution built for the specific buyer dynamics of your market.
See Manufacturing work →Fractional CMO services for Professional Services companies in Series: ICP definition, demand generation strategy, and revenue-tied marketing execution built for the specific buyer dynamics of your market.
See Professional Services work →| Option | Monthly Cost | Strategic Leadership | Execution | Accountability | Time to Results |
|---|---|---|---|---|---|
| Fractional CMO (MarkCMO) | $8K -- $20K/mo | ✅ Full C-suite | ✅ Manages team & agencies | ✅ Revenue KPIs | ✅ 30-60 days |
| Full-Time CMO | $23K -- $42K/mo + equity | ✅ Full C-suite | ✅ Full ownership | ✅ Revenue KPIs | ❌ 6-12 month ramp |
| Marketing Agency | $8K -- $25K/mo | ❌ Tactical only | ✅ Campaign execution | ❌ Deliverable-based | 🟡 60-90 days |
| Marketing Consultant | $5K -- $20K/project | 🟡 Strategy only | ❌ No execution | ❌ Deliverable-based | ❌ You execute |
| VP of Marketing Hire | $15K -- $22K/mo + equity | 🟡 Director-level | ✅ Partial ownership | 🟡 Partial KPIs | ❌ 3-6 month ramp |
Every MarkCMO engagement follows a structured 90-day framework designed to deliver measurable results fast while building the marketing system that compounds for years. There is no six-month discovery phase. No ramp time. You see results in the first 30 days.
Full marketing audit across all channels, spend, and assets. Customer interviews to define your real ICP and buying triggers. Competitive positioning workshop. A prioritized 90-day marketing roadmap with clear KPIs tied to pipeline and revenue -- not vanity metrics.
Launch or rebuild three core demand generation channels. Publish the first content assets targeting your ICP. Build email nurture sequences for every stage of the buyer journey. Configure CRM attribution so every lead has a source and every deal has a marketing touchpoint. Establish sales-marketing SLAs and weekly pipeline reviews.
Double down on the channels performing above benchmark. Kill what is not working and reinvest that budget. Introduce a fourth channel. Present the 12-month marketing roadmap with OKRs tied to pipeline velocity, CAC payback, and revenue growth. Deliver the board report that shows marketing as a revenue driver.
Every engagement includes weekly leadership check-ins, monthly board-ready reporting, and a marketing system designed to produce pipeline independently of ongoing fractional oversight -- because the goal is never dependency, it is transformation.
*Case study is representative of outcomes. Client details anonymized per NDA. Results vary by company size, market, and execution quality.
See more outcomes: Results & Case Studies
Agencies optimize for deliverables. I optimize for revenue. Those are fundamentally different incentive structures, and the results reflect it.
“Fractional CMO engagement paid for itself in month two. Mark runs every channel -- SEO, paid, outbound, content -- and ties everything to revenue. No fluff, all results.”
“We brought Mark in to audit our marketing function and he transformed it. Best $12,000 per month we have ever spent. Our board is finally impressed with marketing's contribution.”
“The cybersecurity market is noisy. Mark cut through the noise with a positioning strategy so clear that our sales team now closes deals in half the time.”
Read all client testimonials →
Mark Gabrielli is a Fractional CMO and COO with 19+ ventures across 12 industries and $50M+ in revenue built. He is not a consultant who delivers a slide deck and disappears. He is a working operator -- the kind of senior marketing leader who sits in your weekly leadership meeting, manages your team, runs your agency relationships, and stays until the results are real, repeatable, and yours to keep.
Mark serves growth-stage B2B companies across Series and nationwide, with deep experience in the industries that define Series's economy. He holds a track record that includes companies in healthcare, SaaS, aerospace, manufacturing, fintech, logistics, and professional services -- from pre-revenue startups to $50M+ businesses preparing for exit or Series B raises.
Learn more: About Mark | Results and Case Studies | Fractional CMO Services | How to Measure Fractional CMO ROI
From first call to compounding results -- here is exactly what the engagement looks like.
Book a 30-minute strategy call at no cost. We audit your current marketing, revenue gaps, team structure, and the single biggest lever holding back your growth. You leave with a clear diagnosis before spending a dollar.
We deliver your full GTM strategy, ICP definition, competitive positioning, messaging architecture, and a 90-day demand generation plan. Every deliverable is board-presentable and execution-ready from day one.
Campaigns go live. We manage your marketing team, agencies, and freelancers with clear KPIs at every level. Outbound sequences launch. Pipeline starts building. You get weekly check-ins and monthly board-ready reports.
Systems compound. Revenue attribution is wired to real numbers. The marketing engine runs without you managing every detail. You stay because the results justify it -- not because you are locked in.
How fractional executive leadership stacks up against every other option on the table.
| Factor | MarkCMO Fractional CMO |
Full-Time CMO In-House Hire |
Marketing Agency Retainer Model |
Consultant Independent |
|---|---|---|---|---|
| Monthly Cost | $8K-$15K | $22K-$38K+ (salary + benefits + equity) | $8K-$30K (narrow scope) | $5K-$20K (advice only) |
| Time to Start | 5-7 business days | 3-6 months recruiting | 2-4 weeks onboarding | 1-2 weeks |
| C-Suite Accountability | Full revenue ownership | Full revenue ownership | Channel-level only | Advice, no accountability |
| Commitment Required | Month-to-month | 12-24 month salary commitment | 3-12 month retainer | Variable, project-based |
| Board-Ready Reporting | Included every engagement | Depends on hire quality | Rarely included | Not standard |
| Team + Agency Leadership | Full C-suite management | Full C-suite management | Self-directed only | Not included |
| Revenue Attribution | Built-in pipeline dashboards | Varies by hire | Rarely available | Not standard |
| Risk if Underperforms | Cancel any time, zero fees | Severance + equity + legal | Contract lock-in | Project walk-away |
| First Results | 30 days (strategy + plan) | 90-180 days (ramp time) | 60-90 days (campaign build) | 30 days (doc delivery) |
Results measured in pipeline generated, CAC reduced, and revenue compounded -- not activity metrics or reports delivered.
"Series B brought pressure from investors to show a path to $50M ARR. Our marketing was generating pipeline but CAC was climbing and no one had built a proper attribution model. The fractional CMO rebuilt the attribution system, identified three channels that were burning 40% of the budget with minimal pipeline contribution, and reallocated. CAC dropped 28% in 60 days.",
"We were at Series B with a VP of Marketing but no strategic CMO layer. The fractional CMO brought the board-level marketing perspective that our VP didn't have yet -- building the investor narrative, structuring the marketing metrics board deck, and aligning the commercial strategy to the growth projections the investors expected.",
"At Series B your investors are watching marketing spend ROI very carefully. The fractional CMO built the revenue attribution model that connected every marketing dollar to pipeline and closed revenue. That transparency with the board completely changed the marketing budget conversation from 'what are we spending' to 'what are we generating'.",
Every MarkCMO engagement is structured to protect you. You stay because the results are compounding -- not because you are locked in. Cancel any time. No fees, no questions.
No hidden scope. No surprise invoices. Every MarkCMO engagement includes the full fractional CMO capability stack from day one.
Full go-to-market strategy, ideal customer profile definition, competitive positioning, and messaging architecture tailored to your market.
Multi-channel pipeline engine -- SEO, content marketing, paid media, email nurture, and outbound -- built as compounding systems, not one-off campaigns.
C-suite management of your marketing team, agency partners, and freelancers with clear accountability and performance benchmarks at every level.
Weekly leadership check-ins, monthly board-ready pipeline reports, and revenue attribution dashboards that replace gut feeling with data.
CRM configuration, attribution modeling, marketing technology optimization, and performance dashboards wired directly to revenue KPIs.
No long-term contracts. No cancellation fees. Engage for as long as it drives results -- exit any time with zero friction.
Every MarkCMO engagement is structured to protect you. You stay because the results are compounding -- not because you are locked in.
Book a free 30-minute strategy call. No pitch deck. No sales pressure. An honest conversation about your Series market, your current marketing, and exactly what it would take to build pipeline this quarter.
Month-to-month. No contracts. First results in 30 days. Serving Series, B, and nationwide.