What does a staffing agency do? It helps employers find, screen, and place qualified candidates for open roles. Depending on the arrangement, those candidates may join the company as permanent employees, work on contract through the agency, or start on contract with the option to be hired permanently.
Many HR leaders still think of agencies more narrowly, as a source of short-term help when someone goes on leave. That’s one part of the work. Professional staffing firms also run permanent searches for roles like controllers, senior developers, and supply chain managers, and they often reach candidates who would never see a job posting.
A staffing agency helps employers find, screen, and place qualified candidates for open positions. Depending on the employer’s needs, agencies can handle everything from sourcing and interviews to hiring and temporary or permanent placement. This allows businesses to save time, access a wider talent pool, and focus on their core operations.
What Does a Staffing Agency Do?
A staffing agency’s work for employers falls into three areas: finding candidates, vetting them, and managing the hiring process through to a placement. Many firms also share market knowledge, such as typical salary ranges for a role and how hard a given skill set is to find right now.
Sourcing candidates
Agencies use job postings and resume databases, but the better ones lean on their own networks, which include professionals they’ve placed before, referrals, and contacts built over years. Those relationships matter because a large share of experienced professionals are happily employed. People in that position rarely browse job boards, though many will take a call from a recruiter they already know.
Screening and vetting
Before a candidate reaches you, a good agency has already interviewed them, checked their experience against the role’s requirements, and in many cases verified skills and references. The goal is a short list of people who are worth your hiring manager’s time.
Managing the process
Once candidates are presented, the agency coordinates interviews, collects feedback from both sides, and keeps things moving. At the offer stage, it can help with salary expectations, counteroffers, and start dates. That support is easy to overlook until a strong candidate drops out because nobody followed up for a week.
How Do Staffing Agencies Work?
Most searches follow a similar sequence, for contract positions and permanent hires alike.
- Intake. The agency meets with you to understand the role, the team, required skills, timeline, and budget.
- Sourcing. Recruiters search their network and outside channels for qualified candidates.
- Screening. Candidates are interviewed and assessed before anyone is presented to you.
- Shortlist and interviews. You review a small group of qualified candidates and meet the ones you choose.
- Offer and placement. The agency helps finalize terms and supports the candidate through acceptance and the start date.
- Follow-up. A good agency checks in after the start date to make sure the placement is working for both sides.
What happens at intake?
Most of what happens later in a search depends on this first conversation. Beyond the job description, recruiters should ask what success looks like in the first six months, why the role is open, and what has made it hard to fill in the past. They should also share what they’re seeing in the market, including how your salary range compares for the skills you want.
Who employs the worker?
It depends on the hiring model. With a direct hire, the new employee joins your payroll from the first day, and the agency’s role ends once the placement is made, apart from any guarantee period. With contract and temporary staffing, the professional is usually employed by the staffing firm, which handles pay and payroll taxes, while your team directs the day-to-day work. Your service agreement should spell out who is responsible for what, so that section deserves a careful read.
How do staffing agencies get paid?
Agencies are generally paid in one of two ways. A permanent placement usually carries a one-time placement fee, and under a contingent arrangement you owe it only if you hire someone the agency introduced. Contract staffing is billed by the hour for as long as the assignment runs. Our post on the value of contingent recruiting explains why many employers prefer to pay only when a hire is made.
What Staffing Agency Services Can Employers Use?
Common misconception: “Staffing agencies only provide temporary workers.” Short-term assignments are only one part of the business. Many professional staffing firms also fill permanent roles, set up contract-to-hire arrangements, and run executive searches.
The table below covers the staffing solutions most professional firms offer and when each one tends to fit.
| Service | What it is | When it fits |
|---|---|---|
| Temporary or contract staffing | A professional works on assignment for a set period, typically employed by the agency. | Projects, leave coverage, seasonal or peak workloads |
| Contract-to-hire | A contract role with the option to convert to permanent employment. | When both sides want to confirm fit before committing |
| Direct hire | The agency recruits and screens candidates, and the hire joins your payroll. | Long-term, core positions |
| Staff augmentation | Specialists join your existing team to add capacity or expertise. | Expanding capability without permanent headcount |
| Executive search | A focused, often confidential search for senior leaders. | C-suite and senior leadership roles |
Two of these models have their own guides if you want more depth. See understanding staff augmentation and understanding the modern executive search process.
Does specialization matter?
For specialized and senior roles, it usually does. A generalist staffing company covers many kinds of positions and suits high-volume hiring. A specialized firm concentrates on a few fields and builds deep networks in each.
firstPRO, for example, focuses on Accounting & Finance, IT, and Supply Chain, Engineering & Logistics. Across those fields, roles range from staff accountants and controllers to software developers, cybersecurity analysts, and logistics managers. A recruiter who works in one of these areas every day knows what the required skills look like on the job, and that tends to make screening more accurate.
Staffing Agency vs. Recruiting Firm vs. Internal Team: What’s the Difference?
Is a staffing agency the same as a recruitment agency?
The two labels overlap, and plenty of people use them as if they mean the same thing. When there is a difference, it comes down to scope. Recruitment agencies have traditionally concentrated on permanent hires, while staffing agencies also cover contract and flexible arrangements. Since many firms offer both (firstPRO among them), the more useful question for an employer is which services a firm provides and how it handles the type of role you need to fill.
Do you need an agency if you have an internal recruiting team?
Often the two work best together. Internal talent acquisition teams are usually strongest at managing inbound applicants, building the employer brand, and running a consistent interview process. Agencies add reach into passive talent, specialized screening for technical or senior roles, and extra capacity when hiring volume spikes.
An agency may not add much for roles that consistently draw strong applicants, or for positions your team already fills quickly and well. The value tends to show up in the roles that stay open too long. If the line between the two functions feels blurry, our post on talent acquisition vs. recruiting breaks down the distinction.
It’s worth looking at the roles on your plan for next year with this in mind. Which ones would benefit most from a recruiter who already knows where the best candidates are working today?
Frequently Asked Questions
Who pays the staffing agency, the employer or the candidate?
The employer pays. In professional staffing, the agency’s fee or hourly margin is covered by the company hiring through it, and candidates typically pay nothing to be placed.
Are contract workers employees of the staffing agency?
In most contract and temporary arrangements, yes. The staffing firm is usually the employer of record, handling pay and payroll taxes, while the client company directs the work. The exact terms depend on the service agreement.
Can I hire a contract worker permanently?
Usually, yes. That’s the purpose of a contract-to-hire arrangement, and many standard contract agreements allow conversion as well. Check the agreement for conversion terms, which may include a fee depending on how long the person has been on assignment.
Conclusion
Once you know what a staffing agency does, it becomes easier to see where one fits in your hiring plan. Some roles are well served by your internal team and a strong job posting. Others call for outside reach, specialized screening, or a more flexible hiring model.
Employers who sort their roles this way tend to bring in outside help where it counts, and early enough that a vacancy never becomes an emergency.
If you’re planning your 2027 hiring and want to see where a staffing agency could help, we’d be glad to talk it through. firstPRO has worked with employers since 1986, and our 50+ specialized recruiters now provide our clients with contract, contract-to-hire, direct hire, and staff augmentation in Philadelphia, Boston, Atlanta, and beyond. Learn how firstPRO can support your hiring strategy.
