What's the best time to contact an administrative assistant hiring manager?

Late afternoon, about 3:30 to 5, when department managers are out of meetings and catching up. Mid-week works better than Monday, when their calendar (the one the missing assistant used to run) is fullest.

Should I send my candidate to HR or the department manager?

Both, in that order of courtesy: tell the manager about the candidate and send HR the résumé so it's in the process. Managers who hear about a good fit tend to ask HR for that résumé by name.

Who hires administrative assistants when there's no department listed?

Ask the front desk which group the assistant will support. If it's a shared admin pool, the administration or office manager owns it. If it's for executives, it's usually an executive operations manager or the executive's chief of staff.

HR told me not to contact hiring managers directly. Can I still reach the department?

Respect a clear instruction from the client you want to win. If HR says every agency candidate goes through them, ask what they need to see and send exactly that, with a note naming the department and the one skill that matches its work. A specific note (“she ran document control for a twelve-person civil team”) gives HR a reason to forward it. If you already reached the manager before hearing the rule, say so plainly in the note; hiding the conversation is what costs you the account. And ask HR whether they use agencies for admin roles at all, because a firm that does will tell you how they want it done.

What makes an administrative assistant candidate stand out to the manager?

Experience supporting the same kind of team. An assistant who has done document control for engineers or scheduling for a medical practice gets a callback that a generic “organized, detail-oriented” profile won't.

Roles we cover › Administrative Assistant

Who Is the Hiring Manager for an Administrative Assistant Job?

Usually not the person who posted it. Ad Call reads the live administrative assistant ads in your city and, for each employer, names the manager the assistant will support, with title, email and office line, graded by confidence. You pitch the person who has been doing their own calendar since the last assistant left.

The administrative assistant ad was posted by HR. The person who'll decide has been doing their own scheduling for a month.

Find the administrative assistant hiring managers in my market — free

Who hires administrative assistants

An administrative assistant is hired for someone: a department head, a practice manager, a team of engineers, a dean. That person (or the manager of that team) interviews last and says yes. HR, a recruiter or the office manager writes and posts the ad, runs the phone screen and sends the offer. Only when assistants sit in a shared pool does an administration manager own the req outright. So the first question on every admin ad is: which department?

HR Generalist or Office Manager (the poster)Posts the ad, screens and schedules. Helpful for the department name; not the decision.
Department Manager being supportedusually owns the reqOwns the req. The assistant works for them every day; they make the final pick.
Administration ManagerOwns the req only where assistants work as a shared pool or admin services team.
Senior Manager, AdministrationOversees admin teams across sites. Call if several admin ads are open at once.
Executive Operations ManagerRuns support for an executive group. Owns assistant hiring for the leadership floor, not for departments.
Manager, Executive OperationsSame seat under a different title format.
Senior Manager, Executive OperationsBudget holder for executive support. An escalation, not a first call.

What Ad Call gives you for an administrative assistant ad

Ad Call leads with the manager of the department the assistant will support, when the ad or the employer makes that clear, and lists the HR or office contact second so you know who will run the process. Signals show days open and reposts, which for admin roles often means the department has been covering the work itself.

jobadcall.com — Administrative Assistant, Water Resources Department · Denver, CO

Ad CallDeskFollow-upsCompaniesGuide

Calder Ridge Engineering Group

Administrative Assistant, Water Resources Department · Denver, CO

33 days open

live 33 daysreposted once with 'immediate start'supports a team of 14 engineers

Likely managers

Helen Varga Water Resources Department Manager

high

hvarga@calderridgeeng.com✓ verified✉ draft email

Tom Pritchett HR Manager

medium

tpritchett@calderridgeeng.comunconfirmed✉ draft email

Office line

(303) 555-0118 from the company's own site

Why call today

The ad names the department, so the owner is the department manager, not HR.
A month open plus 'immediate start' means fourteen engineers are doing their own expense reports.
An engineering group values document control and project filing; lead with that.

Illustrative sample — the layout and labels are the real console's; the company and people are fictional.

The poster isn't the owner: read the ad for the department

Most admin ads tell you who owns them if you read past the benefits paragraph. Look for four tells:

A department in the title or first line: “Administrative Assistant, Facilities” or “supports the Water Resources group.” That's your owner's department.
“Reports to”: often buried near the bottom. It names the seat, sometimes the person.
The work itself: “prepare bid packages” points to estimating; “coordinate faculty travel” points to an academic department; “patient scheduling” points to a practice manager.
Who you're told to apply to: a generic careers address means HR is the poster, and the owner is somewhere else.

Why it matters now: the admin market is replacement-driven. The BLS Occupational Outlook Handbook projects overall employment of secretaries and administrative assistants to decline 2% from 2025 to 2035 but still expects about 314,400 openings a year, nearly all from people leaving the role. Healthcare and social assistance is the largest employer of general administrative assistants, at 32%. Each opening is a specific manager who lost a specific person. Your pitch is replacing that person, not filling a headcount.

Ad Call puts the supported manager in the results when the employer makes it knowable, and the HR contact second so you can do both. That's the administrative assistant hiring manager email you'd otherwise spend a call finding. Run your market free.

Two recruiters, one ad

A regional engineering firm posts “Administrative Assistant, immediate start.” Recruiter A emails the résumé to the careers address and calls HR. The HR manager is polite: the req has sixty applicants, she'll review everything by Friday. Nothing happens.

Recruiter B reads the ad, sees “supports a team of engineers in our Water Resources group,” and calls the main line to ask who runs Water Resources. She reaches the department manager's voicemail at 4:15 and leaves one sentence: an assistant who has run document control and filing for a civil engineering team, available Monday. The manager calls back the next morning and walks the résumé to HR herself.

Same candidate, same ad. Recruiter B asked for the department first.

Department admin assistant: finding out who hires

When the ad doesn't name the department, the receptionist or office manager almost always knows. Ask a question they can answer in five words.

ReceptionistCalder Ridge Engineering, how can I help?

YouHi, quick question. I saw the administrative assistant posting. Do you know which group that assistant will be working with?

ReceptionistI think that's for Water Resources. Are you applying?

YouI'm a recruiter; I have someone who has supported an engineering team before. Who runs Water Resources these days?

ReceptionistHelen Varga. But HR is handling the hiring.

YouMakes sense. I'll send HR the résumé too. Could you put me through to Helen's voicemail? One sentence and I'm out of her way.

ReceptionistSure, one second.

You never argued with the process. You asked a harmless question, agreed to send HR the résumé, and asked for a voicemail rather than a live transfer. That's easy to say yes to. On the voicemail, name the department and one matching skill; the manager supplies the urgency.

Software and scheduling skills a department manager actually checks

HR screens for “Microsoft Office proficiency.” The manager being supported cares about the specific things they've been doing themselves. Confirm these before you pitch, and put the matching two in your first sentence.

Calendar management for more than one person: does the candidate juggle a whole team's meetings, or just one boss?
The company's suite: Microsoft 365 (Outlook, Teams, SharePoint) or Google Workspace. Switching is learnable, but a match is a selling point.
Spreadsheets beyond data entry: sorting, filtering, simple formulas, keeping a tracker current.
Expense and travel: booking, itineraries, reconciling expense reports in whatever tool the ad names.
Documents: formatting reports and proposals, templates, mail merge, PDFs, e-signature routing.
Meeting support: agendas, minutes, action-item follow-up.
Department-specific records: document control for engineers, patient scheduling for a practice, purchase requests for facilities.
Confidentiality: handling personnel files, pricing or student records without being reminded.
Optional credential: the IAAP's Certified Administrative Professional (CAP). A signal of commitment; rarely required for a department assistant.

Questions recruiters ask about administrative assistant reqs

What's the best time to contact an administrative assistant hiring manager?: Late afternoon, about 3:30 to 5, when department managers are out of meetings and catching up. Mid-week works better than Monday, when their calendar (the one the missing assistant used to run) is fullest.
Should I send my candidate to HR or the department manager?: Both, in that order of courtesy: tell the manager about the candidate and send HR the résumé so it's in the process. Managers who hear about a good fit tend to ask HR for that résumé by name.
Who hires administrative assistants when there's no department listed?: Ask the front desk which group the assistant will support. If it's a shared admin pool, the administration or office manager owns it. If it's for executives, it's usually an executive operations manager or the executive's chief of staff.
HR told me not to contact hiring managers directly. Can I still reach the department?: Respect a clear instruction from the client you want to win. If HR says every agency candidate goes through them, ask what they need to see and send exactly that, with a note naming the department and the one skill that matches its work. A specific note (“she ran document control for a twelve-person civil team”) gives HR a reason to forward it. If you already reached the manager before hearing the rule, say so plainly in the note; hiding the conversation is what costs you the account. And ask HR whether they use agencies for admin roles at all, because a firm that does will tell you how they want it done.
What makes an administrative assistant candidate stand out to the manager?: Experience supporting the same kind of team. An assistant who has done document control for engineers or scheduling for a medical practice gets a callback that a generic “organized, detail-oriented” profile won't.

Sources