How do I choose an executive search firm?

To choose an executive search firm, evaluate seven criteria: proven sector expertise, rigorous assessment methodology (certified psychometrics), transparent fee model (retained vs. contingent), verifiable client references, post-hire integration support, geographic coverage (Switzerland + international where relevant) and membership in recognised professional associations (AESC). Always ask to see concrete case studies and to speak with 2-3 recent clients directly.

What is the difference between retained and contingent executive search?

A retained firm is paid in instalments regardless of outcome and works exclusively on your mandate. A contingent firm is paid only when the candidate signs and may compete with other firms on the same search. For C-suite, board or strategic positions, the retained model is almost universally preferred: depth of search, confidentiality, dedicated consultant engagement.

What does AESC accreditation mean for a firm?

AESC (Association of Executive Search and Leadership Consultants) is the international professional association for executive search. Its 1,450+ offices in 70+ countries adhere to a strict ethical code: confidentiality, off-limits commitments (not poaching placed candidates from a client for 12-24 months), conflict of interest management. AESC membership is a quality signal, but its absence is not a disqualifier, many excellent boutique firms are not members.

What are the red flags of an executive search firm?

Main red flags: promise of near-immediate candidate presentation (unrealistic for a real search), contingent model proposed on a C-suite role (incompatible with the required depth), no structured assessment methodology beyond the interview, refusal to share verifiable client references, opaque or variable pricing depending on the candidate. Also be wary of aggressive marketing and unsourced statistical claims.

How many firms should I consult before choosing?

Consult 2 to 3 firms in pre-selection, no more. Beyond that, you dilute your time and lose evaluation depth. Selection should rest on the quality of the initial conversation (does the consultant truly understand your challenge?), the relevance of comparable cases they present and the chemistry with the consultant who will actually run your mandate (not the salesperson).

Should I choose a specialised or generalist firm?

For ultra-technical roles (pharma R&D, biotech, MedTech, specialised finance, senior IT), a sector specialist firm is often superior, they know the profiles by name, understand the codes of the sector and have access to candidates a generalist will never reach. For cross-functional roles (CEO, CFO, Chief People Officer), a premium generalist firm with a real function-based practice can work very well.

How to Choose an Executive Search Firm? 7 Criteria and the Red Flags to Avoid

Choosing the right executive search firm can literally make the difference between a successful mandate and a costly failure for the organisation. And the market is saturated: hundreds of firms between Geneva, Lausanne and Zurich, not counting international, all with marketing messages that look remarkably similar.

Here are the 7 criteria that actually matter, the red flags to spot and the 5 questions to ask before you sign.

Why choosing a firm is more strategic than it appears

Executive search is not a commodity. Two firms working on the same brief can deliver radically different shortlists, one will present excellent profiles, the other adequate profiles without spark.

This difference only becomes visible at the end, when it is too late. A bad choice costs you in:

A mandate that drags on and therefore a prolonged role vacancy
A candidate accepted by default rather than by conviction
Increased risk of early turnover (poor "fit" only reveals itself in the medium term)
Damage to your employer brand (candidates approached form an impression of your company)

Good firms cost more at the quote stage. They cost far less at the outcome stage.

The 7 criteria that make the difference

1. Proven sector expertise

A generalist firm may seem reassuring, "they can do everything". In practice, for technically demanding roles (pharma, biotech, MedTech, chemistry, senior IT, financial services), a generalist will miss 60 to 80% of the right profiles.

How to verify: ask to see 3-5 recent mandates in your exact sector. Not "healthcare" but "pharma R&D oncology". Not "finance" but "asset management or private equity". If the firm produces generic cases or refuses to share, sector expertise is superficial.

2. Rigorous assessment methodology

The classic interview remains the most-used tool in recruitment and the least predictive. A good executive search firm structures its evaluation around certified methodologies: psychometrics (Hogan, SHL OPQ32, TMS based on MBTI typology, Central Test, CTPI-R, DISC), structured interviews with scoring rubrics, in-depth reference checks.

How to verify: ask to see an example assessment report (anonymised). If the firm only offers an annotated CV and a 1-hour interview, you are in standard recruitment territory, not executive search.

3. Transparent fee model

Two dominant models in the profession:

Retained (fixed fee): the firm is paid in instalments regardless of outcome. Mutual commitment, depth of search, exclusivity.
Contingent (success fee): the firm is paid only at signature. Multiple firms may compete on the same role.

For C-suite, board and strategic positions, the retained model is nearly always the right choice. A firm proposing contingency on a CEO or board member role has misunderstood its own stakes: it cannot justify the depth of search required without upfront commitment.

The payment schedule and fee structure should be clearly explained at the quote stage. If anything seems opaque or variable depending on the selected candidate, ask to understand before signing.

4. Verifiable client references

A serious firm has clients ready to recommend it publicly, not just logos on its website. Ask to speak directly with 2-3 recent clients, with a mandate similar to yours.

Red flag: if the firm refuses direct contact under the pretext of confidentiality or only proposes outdated references (teams that have changed in the meantime), be wary.

5. Post-hire integration support

The signature of the contract is not the end of the mandate. A good firm:

Tracks the candidate's integration over multiple milestones (ITalent: at 1, 2 and 6 months, then at 1 year)
Manages any friction or adjustments during the probation period
Guarantees a free replacement if the candidate leaves or is dismissed in the early months following integration

Without this post-signature commitment, you are paying a firm to present a shortlist, not to secure a decision.

6. Geographic coverage matching your stakes

If your mandate is purely local (French-speaking Switzerland), a regional firm may be appropriate. If you are seeking to attract international talent or recruit in a country where you are not established, verify the firm's actual international dimension: foreign offices, formalised partner network, languages spoken by consultants, recent cross-border mandate experience.

Many firms presenting themselves as "international" actually have a 95% domestic activity.

7. Membership in professional associations

The AESC (Association of Executive Search and Leadership Consultants) is the international reference association: 16,000+ professionals, 1,450+ offices in 70+ countries. Its members adhere to a strict ethical code (confidentiality, off-limits, conflicts of interest).

AESC membership is a quality signal, but its absence does not disqualify, many excellent boutique firms (notably in Switzerland) are not members for cost or positioning reasons.

5 questions to ask before you sign

"Who will be my primary consultant on this mandate, not just the person I am signing with?" A good firm presents from the outset the person who will actually do the work. Be wary if you are "passed on" to someone else after signature.
"Can you share two recent client references I can contact directly?" Not logos, not written testimonials, phone numbers.
"How do you assess candidates beyond the interview?" The answer must include named tools (certified psychometrics, structured references, scenario exercises). If the answer is "we have a lot of experience", be wary.
"What happens if the chosen candidate leaves shortly after integration?" A serious firm has a clear guarantee (free replacement or partial refund) for the early months.
"How do you handle confidentiality, concretely?" The answer must include tangible processes: who knows what within the firm, how candidates are contacted, what information is given to them at which stage.

Red flags that should alert you

Promise of a near-immediate shortlist: unrealistic for a real search. Serious sourcing requires market mapping and candidate qualification time that does not compress.
Contingent model proposed on a C-suite role: incompatible with the depth of search needed at this level.
Refusal to share a structured assessment methodology.
Variable pricing depending on the candidate ("we will adjust based on the profile selected"): opens the door to questionable arbitrage.
Aggressive marketing with unsourced statistical claims: "98% success rate", "market leader", "#1 in Switzerland" without verifiable data.
The consultant asks no difficult questions during the first meeting: a good consultant challenges your brief, they do not say yes to everything.

Anecdote · the firm that says no

A Swiss mid-cap industrial company is looking for a new Chief Operating Officer. It consults three firms. The first two accept the mandate without comment, despite a contradictory brief (ultra-senior profile but budget of a mid-level operational director).

The third firm politely declines and explains: "Your brief mixes two incompatible profiles. At this budget, you will find either a solid operational director but not a COO or a senior COO who will negotiate higher. We can help you clarify the stake before launching a mandate, that is our advice."

The client chooses the third firm. Brief readjusted, senior COO recruited subsequently for a broader remit. ROI on the new COO's performance: significantly higher than the initial investment.

Lesson: a firm that says yes to everything will still bill you. A firm that says no to the wrong brief saves you months of mandate and a strategic misstep.

The final test: your gut after the first call

Beyond the objective criteria, ask yourself this simple question after your first meeting with a firm:

"Did this person understand my challenge, not my brief, my real challenge?"

If the answer is "yes", it is probably the right firm. If you hesitate or if you felt you were facing a salesperson reciting their pitch, keep looking.

A good executive search consultant listens more than they speak. They make you reformulate your request, spot what is unsaid and you leave the meeting with a clearer vision than when you arrived, even before signing anything.

Sources

AESC · Executive search standards and code of ethics: international reference for professional practices (off-limits, confidentiality, conflicts of interest).
Pin · Retained vs Contingent Search Framework: decision grid in 6 criteria between retained and contingent.
MIT Sloan Management Review · C-Suite Hiring Seven Mistakes: recurring mistakes in executive hiring and how to avoid them.
Hunt Scanlon · Executive search industry analysis: news and benchmarks of the executive search market.
ITalent data (i-talent.com): approach based on 7 certified methodologies, structured post-hire support at 1, 2 and 6 months then at 1 year.

Discuss your recruitment project →

Frequently asked

Questions on this topic.

How do I choose an executive search firm?: To choose an executive search firm, evaluate seven criteria: proven sector expertise, rigorous assessment methodology (certified psychometrics), transparent fee model (retained vs. contingent), verifiable client references, post-hire integration support, geographic coverage (Switzerland + international where relevant) and membership in recognised professional associations (AESC). Always ask to see concrete case studies and to speak with 2-3 recent clients directly.
What is the difference between retained and contingent executive search?: A retained firm is paid in instalments regardless of outcome and works exclusively on your mandate. A contingent firm is paid only when the candidate signs and may compete with other firms on the same search. For C-suite, board or strategic positions, the retained model is almost universally preferred: depth of search, confidentiality, dedicated consultant engagement.
What does AESC accreditation mean for a firm?: AESC (Association of Executive Search and Leadership Consultants) is the international professional association for executive search. Its 1,450+ offices in 70+ countries adhere to a strict ethical code: confidentiality, off-limits commitments (not poaching placed candidates from a client for 12-24 months), conflict of interest management. AESC membership is a quality signal, but its absence is not a disqualifier, many excellent boutique firms are not members.
What are the red flags of an executive search firm?: Main red flags: promise of near-immediate candidate presentation (unrealistic for a real search), contingent model proposed on a C-suite role (incompatible with the required depth), no structured assessment methodology beyond the interview, refusal to share verifiable client references, opaque or variable pricing depending on the candidate. Also be wary of aggressive marketing and unsourced statistical claims.
How many firms should I consult before choosing?: Consult 2 to 3 firms in pre-selection, no more. Beyond that, you dilute your time and lose evaluation depth. Selection should rest on the quality of the initial conversation (does the consultant truly understand your challenge?), the relevance of comparable cases they present and the chemistry with the consultant who will actually run your mandate (not the salesperson).
Should I choose a specialised or generalist firm?: For ultra-technical roles (pharma R&D, biotech, MedTech, specialised finance, senior IT), a sector specialist firm is often superior, they know the profiles by name, understand the codes of the sector and have access to candidates a generalist will never reach. For cross-functional roles (CEO, CFO, Chief People Officer), a premium generalist firm with a real function-based practice can work very well.