The decision is rarely about which firm has the slickest pitch. It is about which firm can actually reach the eight people in the country who could run your function — and convince one of them to leave a job they are not looking to leave. How to choose an executive search firm comes down to a small number of questions that separate a genuine search partner from a resume broker with a nice deck. This is a buyer-side scorecard: nine decision points, each with an if/then test you can run before you sign anything.
Use it as a filter, not a checklist to admire. Score each firm pass or fail on the gating items first. If a firm fails a gate, the rest of the conversation does not matter — walk. The graded items break ties between firms that clear every gate.
First, set the gate: retained or contingency?
Before you evaluate any individual firm, decide which engagement model the role warrants, because it changes who you should even be talking to.
- If the role is a sitting C-suite seat, a P&L leader, or any hire where confidentiality and a guaranteed shortlist matter — then you are running a retained search. The firm is paid to work the full market on your behalf, exclusively, and is accountable for finishing.
- If the role is important but more replaceable, the talent pool is deep, and speed beats exclusivity — then contingency can be appropriate, and you accept that the firm is paid only on a hire and may be working your role alongside others.
If you are still unsure which model fits, the trade-offs are worth understanding in full before you shortlist firms; our overview of what an executive search firm actually does walks through where each model earns its keep. Once you have set the model, the nine points below apply to the firms competing for the work.
The nine evaluation points
1. Completion rate (gate)
Ask one blunt question: Of the retained searches you opened in the last 24 months, what percentage closed with a placed hire who is still in the seat?
This is the most predictive number in the business, and a serious firm tracks it. Strong retained practices run completion rates in the high-80s to mid-90s percent range. If a firm cannot or will not state a completion rate, treat that as a fail. Vague answers ("we almost always deliver") mean they do not measure it, which means they do not manage it. A 70 percent completion rate is not a discount; it is a one-in-three chance you pay, wait three months, and restart from zero.
2. Off-limits policy (gate)
This is the point most buyers never ask about and later regret. A search firm cannot recruit out of its own active and recent clients — those companies are "off-limits." The standard protection runs one to two years and, at reputable firms, applies at the firm level, not just the individual recruiter.
Here is the trap: a firm with deep penetration in your industry may have placed leaders across your entire competitor set, which means the exact people you most want to recruit are fenced off. Run this test:
- If you want a leader poached from named competitors — ask the firm to confirm, in writing, that those specific companies are not off-limits before you sign.
- If broad industry coverage is what attracts you to the firm — recognize that the same coverage shrinks the pool they can legally approach. Make them map it explicitly.
The AESC Code of Professional Practice codifies these off-limits and confidentiality obligations, which is one reason AESC membership is a useful proxy for a firm that takes them seriously.
3. Research depth, not relationship depth
Many firms sell on relationships — "we know everyone." Knowing everyone is a liability when "everyone" is the same Rolodex every other firm calls. What you want is original research: a named, mapped universe of target companies and the people inside them, built for your specific search, including passive candidates who are not in any database.
If the firm proposes a target list of companies and a sourcing methodology in the pitch — that is research depth. If the pitch is mostly logos of past placements and warm-network language — you are buying a Rolodex, and Rolodexes go stale and are heavily off-limits.
4. The consultant who does the work
The partner who sells the search is frequently not the person who runs it. Ask directly: Who calls candidates, who runs interviews, and what is that person's tenure and track record?
- If the senior partner stays involved and a named, experienced consultant owns execution — pass.
- If the work drops to a junior associate the moment the contract is signed — you are paying senior rates for junior calling. Fail.
5. Functional and sector fluency
A firm does not need to live exclusively in your industry, but the consultant must be able to hold a credible conversation with the person they are recruiting. A CFO candidate can tell within ten minutes whether the recruiter understands the difference between technical accounting depth and FP&A leadership. The same is true of an operations leader in a heavy-industrial or manufacturing environment, or a product leader in SaaS.
For specialized functions, this fluency is not optional. If you are filling a numbers seat, the standards in our guide to finance and accounting executive search show the level of specificity a competent firm should bring to the brief. If the recruiter parrots your job description back to you — they will misread candidates. If they push back on the spec with informed questions — that is the fluency you want.
6. Guarantee terms — read the actual language
Almost every firm advertises a guarantee. The word means little until you read the terms. At the executive level, replacement guarantees commonly run 12 months. The questions that matter:
- Re-search or refund? A re-search at no incremental professional fee is real protection. A partial credit toward a future search is not.
- What voids it? Reorganizations, role eliminations, and changes to the spec often void guarantees. Know the carve-outs.
- Who decides the hire failed? Clarify the trigger and the window.
If the guarantee is a 12-month re-search with narrow, reasonable carve-outs — pass. If it is a 90-day partial credit with a page of exclusions — the guarantee is marketing.
7. Process transparency and reporting cadence
A retained search should give you visibility into the funnel: how many targets identified, how many approached, how many in active dialogue, where each stands. Expect a weekly or biweekly written update. This is also a compliance asset — OFCCP and EEOC obligations flow to you as the employer even when a firm does the sourcing, so a documented, auditable process protects you. If the firm commits to a structured reporting rhythm — pass. If updates are "we'll call when we have someone" — you have no way to course-correct a search drifting off-target.
8. Assessment method
Sourcing finds people; assessment tells you whether to hire them. Ask how the firm evaluates candidates beyond the interview — structured competency interviews, referencing methodology, and how they handle backchannel references versus the candidate's offered list. If the firm has a repeatable assessment framework and references off-list as well as on-list — pass. If "assessment" means a gut read and a reference call to people the candidate chose — you are buying introductions, not judgment.
9. Conflict and confidentiality discipline
If the search is confidential — replacing a sitting executive who does not yet know, or moving into a new market quietly — the firm's handling of information is the whole game. Ask how they approach candidates without revealing your identity prematurely, and how they wall off your search from other engagements. If they have a clear protocol — pass. If confidentiality is an afterthought — assume your intentions will leak.
How to score it
Treat points 1 and 2 — completion rate and off-limits — as hard gates. A firm that fails either is out, regardless of how strong the rest looks. Among firms that clear both gates, score points 3 through 9 and weight them to the role:
- Confidential C-suite replacement: weight conflict discipline (9), the consultant who does the work (4), and assessment (8) most heavily.
- Specialized functional leader: weight functional fluency (5) and research depth (3) most heavily, because reach into a thin passive pool is the constraint.
- Board-visible or first-of-its-kind hire: weight guarantee terms (6) and process transparency (7), because the cost of a miss is highest and the board will ask for the audit trail.
The cost of getting this wrong is not the professional fee. It is the six to nine months a mis-hired executive sits in the seat before the problem is undeniable, plus the compounding cost of decisions made under that leadership and the second search you now have to run. With BLS projecting top-executive employment growing about 6 percent through 2033, the senior talent pool is tightening, not loosening — which raises the premium on choosing a firm that can actually finish.
Run the nine points as written, gate first, and the choice usually narrows to one or two firms quickly. If you want to talk through which model and weighting fit a specific seat, that is the conversation we have at the start of every engagement — you can reach Turnkey Recruiting to start it.
Frequently asked questions
How many firms should I evaluate before retaining one?
Two to four is typical for a senior search. Use the two gates — completion rate and off-limits policy — to cut the field quickly, then evaluate the survivors in depth rather than running a large beauty contest.
Is a boutique or a large global firm the better choice?
It depends on the seat and the off-limits math. Large firms bring reach but the broadest off-limits restrictions; boutiques often have a narrower footprint and a senior consultant doing the actual work. Score both against the framework rather than assuming size decides it.
Should I ever run a retained and a contingency search at the same time?
Rarely, and never on the same role. Dual-tracking the same seat undermines the exclusivity a retained search depends on. Reserve retained, exclusive engagement for confidential or hard-to-finish seats and use contingency only for separate, more replaceable roles.
What references should I ask a search firm for?
Ask for clients whose searches did not go smoothly. How a firm handled a stalled search, a finalist who fell through, or a guarantee claim is more revealing than another success story.