How to hire an occupational hearing conservationist: where to find candidates, what to look for and what to offer

Hire an occupational hearing conservationist when the volume of regulated testing has outgrown what your licensed professional can personally run. The pattern shows up as a mobile van on the road for long stretches, several client sites testing in the same season, or baseline and annual deadlines stacking up faster than your audiologist or physician can clear them.

The demand comes from OSHA's noise standard (29 CFR 1910.95, administered by OSHA). It requires a valid baseline audiogram within 6 months of an employee's first exposure at or above the action level — 1 year when mobile test vans are used. The baseline is preceded by at least 14 hours without workplace noise, with hearing protectors allowed as a substitute, and annual audiograms follow for employees at or above an 8-hour time-weighted average of 85 dB.

Those dated obligations are the job. The standard lets a technician carry them: audiometric tests may be performed by a technician certified by CAOHC or who has demonstrated competence, as long as the technician is responsible to an audiologist, otolaryngologist or physician. The hire converts your supervising professional's calendar from running every test to overseeing the program.

Occupational hearing conservation companies and mobile testing providers hire for this role at the center of their business. Per CAOHC, COHCs work in on-site industry clinics, occupational health clinics, mobile testing vans, government agencies and military installations. OSHA's technician rule applies wherever occupational audiometric tests are performed, so an audiology or ENT practice that runs testing under contract for employers makes the same kind of hire — a technician responsible to an audiologist, otolaryngologist or physician.

If you are hiring an audiometric technician or a mobile hearing testing technician, you are hiring for this role under other names, and this guide treats the titles as one job. The worker's view of the career — duties, the certification route and how people enter it — is in the hearing conservationist career guide; this page stays on the employer's side. If the deeper question is how the whole clinical team should be shaped, the guide to hiring for your hearing practice works through that at the practice level.

Start from what the rule actually says. Under OSHA 29 CFR 1910.95(g)(3), audiometric tests must be performed by a licensed or certified audiologist, an otolaryngologist or other physician, or by a technician certified by CAOHC or who has demonstrated competence. A technician who performs the tests must be responsible to an audiologist, otolaryngologist or physician, and a technician who operates microprocessor audiometers does not need to be certified.

Two clarifications keep this requirement honest. Certification is not the only route — CAOHC itself states COHC certification is not mandatory under OSHA — and the COHC is a credential, not a state license. A state can add its own layer on top: per CAOHC, the Oregon and Washington labor departments require CAOHC certification for occupational hearing conservationists, and the Texas Department of Health requires registration of all audiometric technicians. Confirm the current requirement with the agency that administers it in your state before you write the posting.

Require the COHC anyway — CAOHC describes it as proof that a technician has met a high standard of training, a minimum of 20 hours of instruction. Earning it means completing a CAOHC-approved 20-hour course and passing the exam given at the end, with no prerequisites, and both the certification and recertification courses combine a national standardized written exam with practical exams on audiometric testing and hearing protector fitting.

Verify the credential rather than taking the card at face value. CAOHC runs an online credential verification tool for employers, and COHC certification renews every 5 years — a window that runs from the date the course was completed, not the exam date.

Write the requirements around what the credential covers. COHC training does not qualify a person to do testing other than pure-tone air conduction — bone conduction and speech audiometry are outside it — unless the person is also a licensed audiologist or physician. CAOHC also states audiometric technicians may not interpret audiograms, diagnose ear disorders or refer to specialized care. Everything clinical routes to your supervising professional.

Then hire for the program around the tests: daily functional checks of the audiometer and booth before use, coordinating annual calibrations, keeping equipment logs current, and identifying problem audiograms for the professional supervisor's review. Rules and state registrations move, so re-check the current standard and your state's requirement before the requirements section goes final.

Screen from the pools that already hold the credential or sit one course away from it. Per CAOHC, COHCs may be audiologists, physicians, occupational health nurses, industrial hygienists, HR directors, safety officers or anyone interested — so occupational health nurses and workplace-safety staff are the natural first calls.

Two government-trained pools are worth recruiting from directly. Hearing technicians trained by the Department of Defense with a CAOHC-approved DOEHRS certificate have completed the practicum portion of CAOHC's requirements and must still pass the CAOHC exam — and pay the exam fee — to hold the COHC. VHA audiology, for its part, employs nearly 400 health technicians working under a licensed audiologist's supervision, and many hold the COHC designation — so former VHA audiology health technicians come with that supervised experience, and some already hold the credential.

You can also build the credential into the hire. CAOHC's course search lists in-person, hybrid and virtual certification and recertification courses, and course fees are set by each course director and vary by location — CAOHC publishes no single price. If you sponsor a course for a new hire, budget for the variation rather than a fixed figure.

When you post, name the setting (fixed clinic or mobile van), the supervision structure and the credential you require. The guide to where to post the job compares the boards and programs hearing care employers use, and it is worth seeing what candidates see: open hearing conservationist jobs show how competing employers frame the same role.

Screen against the standard's obligations, not a generic checklist, and give every candidate the same scenarios — drawn from your own program, not hypotheticals.

Start the day before the first employee sits down. Ask a candidate to walk you through their morning before testing begins: a strong answer runs through the responsibilities CAOHC assigns the COHC — the daily functional check of the audiometer and booth before use, keeping the equipment log current, and coordinating the annual calibration.

Then test scheduling judgment. A baseline audiogram must be preceded by at least 14 hours without workplace noise, with hearing protectors allowed as a substitute. Ask how the candidate has sequenced test days around that window, and how a mobile-van program uses the year-long baseline window the standard allows when vans are used.

Give every candidate a standard threshold shift scenario. The trigger is an average change of 10 dB or more at 2000, 3000 and 4000 Hz in either ear relative to baseline, and the employee must be told in writing within 21 days. Listen for the candidate who flags the shift, routes the audiogram to the professional supervisor and makes sure that written notice goes out on time, as CAOHC's scope requires of the COHC. The same candidate stops short of interpreting audiograms, diagnosing or referring — those are outside the technician's lane.

Close the loop on verification before an offer. Run the credential through CAOHC's verification tool, check any state registration your state requires, and ask which audiologist, otolaryngologist or physician the technician was responsible to in past roles — the answer tells you how mature the programs they worked in were.

Keep the interview about the job itself. The clinical judgment in the room — problem-audiogram review, work-relatedness calls, any testing beyond pure-tone air conduction — belongs to your supervising professional, and the strongest technician candidates are the ones who already work that way.

Anchor pay to the data that exists, labelled for what it is. BLS has no occupation code for hearing conservationists, so the closest available group is Occupational Health and Safety Technicians (SOC 19-5012) — a weak proxy that mixes in safety-specialist roles. Nationally in May 2025 that occupation had a median annual wage of $61,560, a mean of $68,120, and a 25th-to-75th percentile of $52,470 to $78,850, across all industries and counting wage-and-salary workers only.

Use that range as a frame, never as the answer: it is not a hearing conservationist wage. Set the actual offer from your task list — single-site clinic days travel far less than a van route with overnight stays — and from who supplies the supervision and the credential.

Schedule is the stronger lever in this role. The work is calendar-driven: baseline deadlines and annual testing waves are dated obligations you cannot move, and a mobile program's routes are shaped by the year-long baseline window the standard allows for vans. Be explicit in the posting about travel blocks, seasonality and overnight stays, because that is where mismatched expectations turn into turnover.

If you sponsor certification, treat the cost as a range: course fees are set by each course director and vary by location, and CAOHC publishes no single price. Recertification comes due every 5 years. Plan around the fact that the certification belongs to the individual, not the employer, even when the employer paid for it — so pair sponsorship with the retention work (schedule, pay, progression) rather than assuming the credential keeps the hire.

If you add bonus or per-test incentives, our research found no published benchmark for this role's bonus plans. Design the plan against outputs the technician actually controls — testing throughput, record completeness, schedule reliability — and put the terms in writing.

Before day one, close three items: verify the credential through CAOHC's tool, confirm any state registration your state requires, and name in writing the audiologist, otolaryngologist or physician the technician is responsible to.

If your program does not yet have a professional supervisor, that is the companion hire or contract. The role belongs to an audiologist, otolaryngologist or physician, and CAOHC's corresponding Certified Professional Supervisor (CPS/A) credential — valid for 5 years — is open only to audiologists and physicians with a current practitioner license; other professionals may take the course but not the exam. Under OSHA, the professional supervisor overseeing the audiometric program is also who determines work-relatedness of a hearing loss for OSHA 300 Log recording.

Stand up the records system during onboarding, because it outlives any one hire: under OSHA's rule, noise exposure measurement records are kept for 2 years, and audiometric test records are retained for the duration of the affected employee's employment.

Run the ramp on a graduated plan — shadow the first weeks, test under observation next, own a schedule last — with the daily functional checks, calibration coordination and equipment logs transferring block by block, and the supervising professional signing off each block.

Calendar the credential from the start. COHC certification renews every 5 years, counted from the course completion date; an extension must be requested at least 30 days before expiry, no extension is granted after expiration, and a certification that lapses without one means retaking the full 20-hour course. CAOHC emails reminders a year and six months before expiration, but tracking the date is the certificant's job — make it a shared calendar entry anyway.

Review the scope, the supervision line and the records on a fixed cadence through the first months of employment, and re-read them whenever your service mix or your state's rules change.

Employer information, not licensing, legal, medical, clinical, billing or coding advice. OSHA's requirements and state registrations change and are fact-specific; confirm current requirements with OSHA's rule text, the state agencies named, and — for employment terms — the DOL or a health-care attorney.