How to Build a Marketing Function From Scratch at a 200-Person B2B Company
- Roger M.
- Jun 25
- 4 min read
Your company has 200 employees, $30M in revenue, and no marketing function. There is a marketing coordinator who manages the agency relationship. There is the agency itself. There is the CEO, who approves campaigns when time allows. That is the entire marketing infrastructure for a $30M company. This is not unusual. It is the default at mid-market B2B companies that grew on the strength of the product, founder relationships, or a single dominant sales channel.
Marketing was never built because it was never the bottleneck — until now. Revenue growth has decelerated. The sales team needs pipeline that does not depend on the founder's network. The board is asking about marketing's contribution to growth. The company needs a marketing function. Building one from scratch is not a hiring exercise. It is an architecture exercise that determines whether the function generates revenue or generates activity.
How do you build a B2B marketing team from scratch?
The build follows a three-phase sequence over 12 months. Phase 1 is infrastructure (months 1–3), led by a fractional CMO. Phase 2 is first hires (months 3–6). Phase 3 is scale and optimisation (months 6–12). The sequence matters: hiring before the infrastructure exists means people build their own ad hoc systems that may never connect to revenue. Building the infrastructure first means every hire slots into a system that is already producing attributed data.
Phase 1: Infrastructure (months 1–3). Before hiring anyone, build the system they will work within. Validate the ICP from closed-won data — which verticals, company sizes, and buyer titles correlate with the highest deal values and shortest sales cycles. Configure multi-touch attribution in HubSpot or Salesforce with a standardised UTM taxonomy. Audit existing agencies against revenue contribution, not activity metrics. Build the revenue dashboard showing pipeline coverage, marketing-sourced pipeline, and CAC by channel. Establish the operating cadence: weekly pipeline reviews, monthly performance reports, quarterly board presentations. This entire phase is led by the fractional CMO at 20 to 25 hours per month. No new hires are needed.
Phase 2: First hires (months 3–6). With the architecture in place, the first two hires slot into defined roles with clear KPIs. The fractional CMO writes the job descriptions, runs the hiring process, onboards the new team members, and mentors them against the system that now exists. The new hires are immediately productive because they are working within an infrastructure that produces data and direction — not starting from scratch with no system, no attribution, and no strategic guidance. Companies that hire before building the infrastructure typically see 4 to 6 months of unproductive ramp time as new hires figure out what to do on their own. Companies that build infrastructure first see productive contribution within 30 to 60 days.
What should the first marketing hire be?
The first hire should be a marketing manager with three to five years of B2B experience — not a VP Marketing, not a director, not a specialist. A marketing manager at $65,000 to $95,000 who can execute across channels, manage agency relationships daily, own the content calendar, maintain CRM data quality, and run the attribution infrastructure the fractional CMO built. This person is the execution backbone. The fractional CMO remains the strategic leader.
This is counterintuitive for many CEOs, who assume the first marketing hire should be the most senior person they can afford. The opposite is true. A senior hire without infrastructure builds their own system from scratch — one that reflects their personal preferences rather than the company's validated data. A mid-level hire working within an existing system produces immediate value because the strategic decisions have already been made. They execute against the ICP, the attribution architecture, and the channel plan that the fractional CMO designed and validated.
The second hire, one to two months later, is the channel specialist. If attribution data shows organic search has the lowest CAC payback, hire a content specialist. If paid acquisition is the primary channel, hire a performance marketer. If outbound is generating the best pipeline, hire an SDR who sits in marketing. The decision is data-driven, not assumption-driven — because the attribution infrastructure from Phase 1 now produces the data to make it.
How much should a 200-person company spend on marketing?
B2B companies between $15M and $50M revenue typically allocate 5 to 12 percent of revenue to marketing, depending on growth rate and competitive intensity. For a $30M company growing 25 percent annually, total marketing investment — team, agencies, tools, and ad spend — should be $1.5M to $3.6M per year. Companies growing faster or in highly competitive markets trend toward the upper end. Companies in less competitive spaces with strong product-led growth trend lower.
The critical insight is allocation, not total spend. Most mid-market companies without a marketing leader over-index on agency retainers (40 to 60 percent of budget) and under-invest in attribution, team capability, and high-performing channels. The fractional CMO's first 90-day contribution is rebalancing: agency retainers drop from 50 to 30 percent through consolidation, ad spend on attributed channels grows from 25 to 40 percent, and team investment increases from 10 to 20 percent. Total budget may not change. Effectiveness transforms.
The 12-month build produces a marketing function the company owns — ICP documented, attribution in the CRM, playbooks internal, team members building institutional knowledge monthly. This is the difference between renting marketing capability through agencies and building it as a permanent asset. Both have a role. But only owned capability creates durable competitive advantage. A fractional CMO with mid-market build experience has designed this function multiple times and can compress the 12-month build into a proven sequence that avoids the missteps first-time builders make.
→ Download the 90-day build plan: rogemabag.com/90-day-build-plan
The complete phased plan: infrastructure checklist, hiring sequence, budget framework, and attribution configuration guide.
Sources: McKinsey Global Tech Agenda 2026; Glassdoor 2026; Bain; SaaS benchmarks 2025–26.
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