Fractional COO

"Fractional COO" is the industry shorthand for a senior operator engaged on a part-time, multi-month basis. The role replaces a full-time COO hire when the operational gap is real but bounded, typically a specific operating-discipline install, a post-acquisition stabilization, or a sponsor-led portfolio operation upgrade.

At Obsidian Axis Group, we call this engagement an Operations Architect because the work is system design, not role replacement. We don't replace your operating function. We architect the system it runs on, then hand it back, documented, in 90 days. The category label most readers search for is "fractional COO"; the work itself is architecture, then exit.

Operations Architect engagements run on a monthly retainer rather than salary plus equity. At Obsidian Axis Group, retainers are $7,500 to $12,500 per month over a 90-day arc, entered through a $10,000 fixed-fee Operational Diagnostic that credits toward the engagement. The economics replace $15,000 to $25,000 per month in operational overhead, software spend plus the hidden labor of managing tools nobody fully understands.

When an Operations Architect (a.k.a. fractional COO) actually fits.

The strongest fits are post-acquisition and lower-middle-market, where the operating gap is acute and the methodology earns its scope. The role also fits two broader operator situations that are easier to overlook.

The PE / LMM core fits

• Post-acquisition. The seller-operator leaves at close. The new owner needs operating discipline installed before the muscle memory walks out.
• Founder bottleneck. A $10M to $50M operator where every decision routes through one person. An Operations Architect un-routes the decisions and installs the SOPs.
• Sponsor-led portfolio install. A PE portfolio company that needs documented operating discipline before the next round or strategic-acquirer diligence.
• Pre-sale ops cleanup. 12 to 18 months from sale, getting the operating system written properly before the data room opens.

The broader operator fits

• The right-sized senior-ops need. You know operations needs senior attention but a full-time COO doesn't fit. Either the comp band ($250K+ base, equity, severance risk) is wrong for your stage, or there isn't 40 hours a week of actual COO work, or both. An Operations Architect engagement scopes to the operating gap, not to a job description. You get the same operating discipline for $23K to $38K over a 90-day arc instead of $250K+ a year, with a clean exit when the work is done.
• The "I know it could be better but can't name what" diagnosis. The process feels leaky. Decisions take too long. Growth isn't translating into capacity. You can't articulate the specific problem yet. The Diagnose phase names the gap with numbers, in writing, in four weeks. You decide whether to keep going from there. No long-term commitment to get the diagnosis itself.

If you already have a COO, an Operations Architect engagement is not a threat to the role. It's a force multiplier on it. We architect the system; your COO (or future COO) runs it. The hand-off is the deliverable.

Documented operating discipline.

The deliverable is not a strategy deck. It is a working operating system: SOPs the line managers actually use, KPIs the leadership team reviews on a cadence, decision trees that route work without human bottlenecks, and the trained in-house ability to run all of it without us present. The engagement ends when the team has run one full operating cycle without us being essential.

Operations Architect (Fractional COO) vs full-time COO vs consultant.

See also.

• Operations Architect Services, engagement structure and pricing
• The Axis Method, the methodology used in every engagement
• Operational waste, what we measure during diagnose

Talk through it.

If any of this is relevant to where you are, book a 30-minute scoping call. No pitch deck.