CEO Executive AssistantExecutive assistant staffing services provide consulting firms with professional search and placement support for EA hiring. Rather than navigating the EA talent market independently, you engage a staffing agency that sources, screens, and presents qualified candidates. The agency’s expertise in EA talent identification, its candidate pool, and its knowledge of the professional services EA market are the primary value proposition.
This guide covers how EA staffing services work, how to select the right agency for a consulting firm, and how to get the most from the staffing relationship.
How EA Staffing Services Work
EA staffing agencies operate in two primary modes for consulting firms:
Permanent Placement (Direct Hire)
The agency sources and screens candidates for a permanent full-time or part-time EA role at your consulting firm. The agency presents its top candidates; you interview, select, and make an offer. The candidate becomes a direct employee of your consulting firm.
Agency fee: 18 to 25 percent of the first-year base salary
What the fee covers: The agency’s sourcing, screening, and presentation work, plus a guarantee period (typically 60 to 90 days) during which they will re-search if the placed candidate does not work out.
Timeline: 3 to 8 weeks from engagement to hire
Temporary or Contract Placement
The agency provides an EA on a temporary or contract basis. The EA is technically employed by the staffing agency; the consulting firm directs the work and pays the agency a markup on the EA’s compensation.
Agency markup: 30 to 55 percent above the EA’s hourly compensation
Use case: Covering a leave, filling a gap while a permanent search is underway, or evaluating a candidate before permanent employment commitment.
Temp-to-Perm Placement
The agency places an EA initially as a temporary placement with the explicit intention of converting to permanent employment after a defined trial period (typically 60 to 90 days).
What this provides: A built-in evaluation period before permanent commitment. Both parties can assess fit under real working conditions. The agency handles payroll and compliance during the temporary period.
Conversion: At the end of the trial, the consulting firm either converts the EA to direct employment (often with a conversion fee, or reduced from the standard permanent placement fee if it was negotiated upfront) or releases the EA and begins a new search.
This is often the optimal structure for consulting firms that want a direct employee but want to verify fit before committing.
Selecting the Right EA Staffing Agency for Consulting Firms
Not all EA staffing agencies are equally suited to consulting firm placements. Selection criteria:
Professional Services Specialization
Agencies with significant consulting, financial services, or professional services client experience understand what EA support in these environments requires. They know the level of sophistication, the communication standards, and the confidentiality expectations that consulting CEOs need in an EA.
Ask specifically: “What percentage of your EA placements are in consulting or professional services firms? Can you describe the EA profile you typically place in these environments?”
Quality of the Screening Process
The agency’s screening process determines the quality of candidates you will see. Ask:
- What does your screening process involve?
- Do you conduct reference checks before presenting candidates?
- How do you assess professional communication quality?
- What assessments or skills tests do candidates complete?
Agencies with rigorous, multi-stage screening deliver better candidate quality than those who quickly match resumes to job descriptions.
Candidate Pool Depth
An agency’s candidate pool includes both active candidates (currently looking for a new role) and passive candidates (currently employed but open to the right opportunity). Agencies with deeper pools, particularly in the professional services EA market, produce better matches than those working only from active applicant lists.
Guarantee Terms
What guarantee does the agency offer if the placed candidate does not work out? Standard terms are 60 to 90 days: if the EA leaves or is terminated within the guarantee period, the agency will conduct a replacement search at no additional fee.
Understand the guarantee terms before signing. Some agencies offer 30 days; high-confidence agencies offer 90 days or more.
Getting the Most from the Staffing Relationship
Brief the Agency Thoroughly
The quality of the agency’s search is directly determined by the quality of your brief. A vague brief (“I need an EA for my consulting firm”) produces a broad search with mixed results. A specific brief produces a targeted search with better candidates.
Your brief should include:
- Consulting firm description (size, focus, client types)
- Role scope in detail (specific responsibilities, not generic “EA work”)
- Required experience level and industry background
- Communication quality standard and examples of what you need
- Compensation range you will offer
- Timeline requirements
Evaluate Candidates Rigorously Yourself
Even with agency screening, evaluate candidates yourself against the specific consulting-firm standards you have defined. The agency screen is a filter, not a guarantee of fit. Your own evaluation is the definitive quality gate.
Use structured interviews with consistent questions. Check references yourself, not just through the agency’s reference report. Request work samples.
Use the Trial Period Actively
If using a temp-to-perm arrangement, use the trial period as a genuine evaluation, not a formality. Set clear performance expectations from day one, provide regular feedback, and assess performance against the EA-specific criteria that matter for your consulting firm.
Do not convert to permanent employment because the trial ended and it was “fine.” Convert because the EA demonstrated the specific capabilities you need and because you have confidence in the long-term relationship.
For specific criteria to evaluate during the trial, see our guide on what to look for in a consulting executive assistant.
For context on the alternative to staffing agencies, managed virtual EA platforms, see our comparison guide at consulting executive assistant service comparison.
According to Harvard Business Review, the most effective executive assistant hires involve a thorough process of evaluation against the specific demands of the executive’s role and environment, not just assessment of generic administrative capability.
EA Staffing Costs: Full Breakdown
Permanent placement fee: 18 to 25 percent of first-year base salary
- On a $80,000 EA: $14,400 to $20,000
- On a $100,000 EA: $18,000 to $25,000
Temporary hourly markup: 30 to 55 percent above the EA’s compensation
- EA compensated at $35/hour: you pay $45.50 to $54.25 per hour
- EA compensated at $45/hour: you pay $58.50 to $69.75 per hour
Conversion fee (temp-to-perm): Varies by agency and negotiation; typically 10 to 15 percent of annual salary if not negotiated into the initial agreement
Add these fees to the ongoing employment costs (salary, benefits, payroll taxes) to get the full first-year cost picture.
For a full breakdown of EA costs across all models, see our guide on cost of executive assistant for consulting CEO.
When to Use Staffing vs. When to Use a Managed Platform
Use EA staffing when:
- You want a direct employee (W-2, with employment relationship)
- Physical presence is important for the role
- You want the flexibility to compensate and retain the EA directly over the long term
- You have the HR infrastructure to manage an employment relationship
Use a managed virtual EA platform when:
- Speed to deployment matters (1 to 3 weeks vs. 3 to 8 weeks)
- You do not need physical presence
- You want to avoid employment infrastructure overhead
- You want the platform’s quality assurance and backup coverage
Many consulting firms use a managed platform for ongoing virtual support while using staffing agencies for specific direct-hire needs (when they expand to an office manager role, when they need in-person support for events, etc.).
Conclusion
EA staffing services provide consulting firms with professional search and placement support that produces better candidates more efficiently than self-directed hiring. The key to getting the most from the staffing relationship is selecting an agency with genuine professional services expertise, briefing them specifically on consulting firm requirements, and evaluating candidates rigorously yourself against the standards that matter for your firm.
For direct-hire needs with a trial period, the temp-to-perm structure offered by quality EA staffing agencies is one of the best-structured approaches available. Use it well, evaluate honestly during the trial, and commit when the evidence supports long-term confidence.
Related Reading
For further context, explore Get Executive Assistant for Automotive Executive and Get Executive Assistant for Construction Executive.