How Recruiters Search ATS Databases (and How to Show Up)

How do recruiters search ATS databases?

Every major ATS stores the text of your resume and lets recruiters search it. The details differ, but the building blocks are the same.

In Greenhouse, recruiters turn on Full Text Search² on the All Candidates page and type their terms. Each result shows a snippet of how the terms appear in the candidate's profile. Greenhouse's Boolean guide says searches cover resumes, notes and scorecards¹.

In iCIMS, a recruiter builds a Candidate Keyword Search, picks Boolean as the keyword type and filters by folder status such as "Cand:Active." iCIMS then sorts results by rank⁵, with the candidates who most closely match the search criteria at the top.

What do recruiters search for first? Skills. In Jobscan's 2026 ATS usage report, 76.4% of recruiters⁸ said they search and rank candidates by skills from the job description. Education, job titles, licenses and certifications, and years of experience follow.

What does a recruiter's Boolean search string look like?

The operators are simple, and they behave almost identically across vendors.

Greenhouse notes that without quotation marks, each word is treated separately¹, usually with an assumed AND between them. iCIMS adds a double asterisk that matches all forms of a word⁴, so "sell**" finds sell, sold and selling.

The key point: the system matches strings, not meaning. If a recruiter types "PMP" and your resume only says "Project Management Professional," a plain keyword search may skip you. Our guide to how ATS works explains where this search sits in the hiring process.

Which filters do recruiters search with besides keywords?

Filters are where location and dates start to matter. iCIMS lets recruiters show each candidate's default address location⁵ in the results. Workday HiredScore's Global Talent Search filters candidates by location, years of experience, skills, education level and language⁶.

Recruiters also reuse their best searches. Greenhouse has no in-app "save search" button, so its help center tells recruiters to bookmark the filtered page³, because the URL stores every filter. Opening the bookmark later reruns the search on current data.

Tags are the other quiet filter. Lever's automation can handle archiving, tagging, emailing and advancing candidates⁷, and a tag such as a skill or a past interview stage becomes one more way to pull up a list later. You cannot see or control tags, but a clear, well-labeled resume makes accurate tagging more likely.

For platform-specific detail, see our guides to how Greenhouse ATS works and how Lever ATS works.

Do recruiters search past applicants for new jobs?

This is the part most job seekers miss. A rejection for one job does not remove you from the database.

Workday describes HiredScore Global Talent Search as a tool to identify relevant candidates for open requisitions⁶ from past applicants. It can even recommend up to 4 matching open requisitions for a single candidate. Recruiters can then invite that person to apply. Lever's listing likewise promises to "rediscover high-fit talent"⁷ by tapping past applicants.

Two practical takeaways follow. First, the resume you upload is the one recruiters search later, so a generic, keyword-thin file can cost you future roles too. Second, when you reapply, update the file in your profile. Our guide on how to reapply to a company covers timing.

What does the way recruiters search mean for your resume?

Turn each search habit into one resume rule.

1. Use the exact job title. Titles are a core search field. If your internal title was "Associate, Client Success" and you did the work of a customer success manager, show the common title. Our guide to resume job title vs actual title explains how to do this honestly.
2. Write acronyms and full forms once each. "Search Engine Optimization (SEO)" matches both searches.
3. Spell tools the standard way. Write "JavaScript," "Microsoft Excel" and "Salesforce," the way postings spell them.
4. Show your location. Location filters need a city and state, or "Remote" if you only want remote work.
5. Put skills in bullets, not only in a skills list. Snippets show the matching text, and a skill tied to a result reads better.
6. Keep the file parseable. Text inside images or complex graphics may not reach the search index at all.

Our resume keywords guide lists high-value terms by field. Today's companion piece on resume keywords by industry goes deeper for specific sectors.

How can you check if recruiters can find your resume?

Do the test manually first. Open your resume, press Ctrl+F, and search for the job title and your top three skills from the posting. Any zero result is a gap.

Next, check parsing. If your resume does not convert to clean text, no Boolean string will find it. Our sibling article on resume parsing errors lists the most common causes.

Finally, compare against a live posting. The free Rezoom ATS resume checker shows which of a job description's keywords your resume is missing, so you can close the gaps recruiters search for before you apply.