These Federal Occupations Have the Oldest Workforces. Some Are Barely Recruiting Replacements.

The federal government's oldest occupations are not all facing the same succession problem.

In May 2026, 63.5% of federal Administrative Law Judges were age 55 or older. The share was 60.0% among Aviation Safety employees, 55.7% among Construction Analysts and 53.3% among Chaplains. Mail and File employees crossed the halfway mark at 50.1%.

Those figures make a compelling ranking. They do not, by themselves, show who is about to retire.

Age 55 is not a universal federal retirement threshold. Eligibility depends on exact age, creditable service, retirement system, coverage and sometimes special provisions. An older workforce is not evidence of diminished performance, either. Experienced employees often hold precisely the institutional and technical knowledge that succession plans are designed to preserve.

The operational concern emerges only when several signals align. FederalHiringData paired OPM age distributions with length of service, 2025 retirement actions, agency concentration and visible USAJOBS recruiting. That wider view identifies a smaller set of occupations where an older workforce and long service coincide with a thin public replacement pipeline.

Administrative Law Judges are the strongest example. Of 1,174 employees, 41.2% were age 60 or older and 23.8% were both in an age-60-plus band and reported at least 20 years of federal service. OPM recorded 184 retirement actions in the series during 2025. Yet FederalHiringData's archive found only five announcements opened from Jan. 1 through Aug. 29, 2026, and the current USAJOBS Search API returned one result when checked Aug. 29.

Claims Assistance and Examining shows a similar, smaller pattern: 47.8% of its 941 employees were 55 or older, 20.5% were age 60-plus with 20-plus years of service, and the series recorded 178 retirement actions in 2025. The archive found three announcements in the comparable 2026 period. USAJOBS returned no current result at capture time.

Aviation Safety complicates the story in a useful way. It is nearly as old as the judge workforce, but its replacement signal is much stronger: 451 archived announcements in the 2026 window and 73 current USAJOBS results. Age concentration is a planning fact. Weak recruiting is a separate fact, and the two should not be confused.

The oldest federal occupations in May 2026

FederalHiringData ranked occupation series with at least 500 employees in OPM's May 2026 detailed employment file. May is the latest complete month suitable for a governmentwide comparison. OPM says the June release is missing about 83,000 Defense records across 32 components, so using June would distort occupations with substantial Defense employment.

The estimated median ages below come from the midpoint of OPM's published five-year age bands. They are useful approximations, not exact person-level medians.

The table includes small specialized occupations and large operational ones. That distinction matters. A 10-point age shift in a 600-person series presents a different hiring and knowledge-transfer problem from the same shift in a 12,000-person series.

It also includes very different entry paths. Administrative Law Judges arrive through a specialized appointment process. Aviation Safety employees often bring extensive industry or operational experience. Chaplains and Medical Officers enter credentialed professions. Mail, file, custodial and motor-vehicle work draw from different labor markets and grade structures. One governmentwide recruiting response would not fit them all.

The ranking excludes selected occupation series that may contain positions covered by enhanced retirement provisions. Firefighters, criminal investigators and air traffic controllers have different age and service structures; they appear separately below.

Age 55 is not retirement eligibility

OPM's ordinary FERS rules illustrate why a simple age threshold misleads. Common immediate-retirement combinations include age 62 with five years of service, age 60 with 20 years, or minimum retirement age with 30 years. Minimum retirement age varies by birth year. Other reduced, early, deferred and special cases have different conditions.

The public employment file does not provide exact age, exact creditable service, retirement system or covered special service. FederalHiringData therefore did not label every employee age 55 or older as eligible.

It constructed a stricter descriptive overlap instead: employees in OPM's 60-64 or 65-plus age bands who also report at least 20 years of federal service. Even that measure is not an eligibility count. Length of federal service in the employment file is not necessarily the same as creditable retirement service, and the file does not show whether an employee is under FERS, CSRS or another system.

The overlap changes the order.

Administrative Law Judges remain first: 279 employees, or 23.8% of the series, sit in the age-60-plus and service-20-plus overlap. Claims Assistance and Examining moves to second at 20.5%. Technical Systems Program Managers move to third at 18.6% even though only 44.0% of that series is 55 or older. The reason is service concentration: 65.1% of its 679 employees report at least 20 years of federal service.

Physics also rises in the joint ranking. Only 31.9% of physicists were 55 or older, below many occupations in the first table, but 17.8% were age 60-plus with 20-plus years of service. Electronics Engineering is another scale example: its joint share was 14.1%, but that represented 1,879 employees because the series had 13,299 people.

This is why succession planning should use both shares and counts. A small occupation can lose a large fraction of its expertise at once. A large occupation can have a moderate percentage that still represents thousands of experienced workers.

Some age concentrations have been building for decades

The long record distinguishes persistent occupational structure from recent aging.

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Administrative Law Judges already had a 63.6% age-55-plus share in September 2000. The share climbed to 74.4% in 2010, then fell to 59.7% in 2020 before returning to 63.5% in May 2026. The occupation has long recruited experienced professionals rather than a broad entry-level cohort; it had no employees under 35 in the latest snapshot.

Aviation Safety moved differently. Its age-55-plus share rose from 37.5% in 2000 to 48.8% in 2010 and 61.3% in 2020. It remained 60.0% in 2026. Employees under 35 were just 2.1% of the series. That profile can reflect the experience required for safety oversight, not simply a failed recruiting program.

Mail and File combines aging with contraction. The series fell from 12,019 employees in 2000 to 7,413 in 2010, 4,706 in 2020 and 1,559 in 2026. Its age-55-plus share rose from 15.2% to 50.1%. Digitization and changes in administrative work are plausible context, but the public data does not assign causes. The defensible finding is that the remaining workforce is much smaller and older.

Telecommunications also contracted, from 7,365 employees in 2000 to 3,932 in 2026, while its age-55-plus share rose from 23.0% to 44.7%. Classification changes and shifts into other information-technology series may contribute. Long comparisons cannot tell us how much work disappeared, moved or changed names.

Recruiting separates the old from the exposed

FederalHiringData compared occupation headcount with two flow measures: OPM retirement actions during calendar 2025 and archived USAJOBS announcements opened from Jan. 1 through Aug. 29, 2026. Both were normalized per 1,000 May 2026 employees for the chart.

The rates are directional, not a balance sheet. A retirement action is a processed personnel action and not necessarily a unique person. An announcement can cover multiple positions, multiple locations or no eventual hire. An announcement also can recruit for replacement, growth or a standing register. Subtracting one from the other would create false precision.

Still, the contrast is informative.

\*Current Search API results captured Aug. 29, 2026. Counts can change as announcements open and close.

Administrative Law Judges and Claims Assistance sit in the high-age, high-retirement-action, low-recruiting corner. The local archive found only one ALJ announcement in the comparable 2025 period and five in 2026; it found five Claims Assistance announcements in 2025 and three in 2026. Those small counts do not prove agencies failed to recruit through every available channel, but they show little visible public pipeline.

Aviation Safety is the counterexample. Its workforce is older, but the archive found 582 announcements in the 2024 window, 627 in 2025 and 451 in 2026. The official Historic JOA API returned 780 results for the 2026 window, reflecting different series tagging and coverage than the local archive. The article does not combine those totals. Both sources show substantial recruiting activity.

Medical Officer also has an older workforce - 42.7% age 55-plus - but 2,542 archived announcements in the 2026 window and 1,212 current official results. Announcements do not guarantee that agencies can fill specialized positions, yet this is not a barely visible pipeline.

Technical Systems Program Manager presents a middle case. The occupation is small and entirely concentrated in the Department of Transportation in the source data. It recorded 117 retirement actions in 2025, 40 archived announcements in the 2026 window and six current results. The series had only 13 employees under 35.

Agency concentration turns occupation risk into agency responsibility

Several old occupations are not broadly distributed across government.

Transportation employed 97.8% of Aviation Safety employees and 100% of Technical Systems Program Managers. The Social Security Administration employed 79.6% of Administrative Law Judges and 63.1% of Claims Assistance employees. Veterans Affairs employed 81.6% of Medical Officers and 55.0% of Mail and File employees. Army accounted for 64.9% of Construction Control Technical employees.

Concentration is not failure. It identifies where succession planning can be most targeted. Social Security does not need a generic governmentwide judge campaign if its real constraint is a specialized appointment pipeline. Transportation can align aviation hiring with inspector qualifications and knowledge transfer. Veterans Affairs can plan medical recruitment and administrative support together where the work is organizationally connected.

The same concentration can create vulnerability. If one agency pauses hiring, restructures an occupation or loses a training pipeline, there may be no broad cross-government market to compensate.

It also changes how the public announcement record should be read. A nationwide agency can issue one announcement for many locations, while another organization may publish separate controls for each office. A standing register may stay open for months; a specialized announcement may close after only a few days or after reaching an applicant cap. The number of controls is therefore evidence of visible recruiting effort, not a uniform measure of positions offered.

For concentrated occupations, internal movement can be especially important and especially hard to see. An agency may develop candidates through details, promotions, reassignment, direct-hire authorities or noncompetitive actions that do not appear as ordinary public announcements. Conversely, a high announcement count can reflect repeated difficulty filling the same kinds of roles. Public data cannot settle that distinction. It can identify where the gap between workforce exposure and visible recruiting is large enough to warrant an agency-level explanation.

OPM describes succession planning as part of strategic workforce planning: agencies assess the talent pipeline, preserve institutional knowledge and plan for future needs. The data here identifies where to ask those questions. It does not grade the quality of any agency's plan.

Enhanced-retirement occupations need a separate lens

Selected law-enforcement, firefighting and air-traffic-control positions can be subject to special retirement provisions and mandatory retirement rules. Their age distributions therefore should not be ranked against ordinary occupations without qualification.

In May 2026, the age-55-plus share was 5.9% for Criminal Investigation, 5.5% for Border Patrol Enforcement, 5.1% for Fire Protection and Prevention, 4.4% for Air Traffic Control and 3.0% for Correctional Officers. Their estimated median ages ranged from 37 to 42.

Those younger profiles do not imply low succession risk. OPM recorded 2,870 retirement actions in Criminal Investigation during 2025, 676 in Border Patrol Enforcement, 637 in Air Traffic Control, 530 among Correctional Officers and 476 in Fire Protection and Prevention. Earlier retirement can produce substantial turnover before an occupation ever appears old by an ordinary age-55 threshold.

Occupation code alone does not prove that every incumbent is in a covered primary or secondary special-category position. FederalHiringData therefore labels these series as special-retirement-related context, not as a count of covered employees.

The distinction demonstrates the larger lesson: the oldest workforce is not automatically the one with the most immediate replacement demand.

Several federal occupations became younger

The governmentwide picture is not uniformly aging.

Among series with at least 500 employees in both snapshots, Soil Science's age-55-plus share fell 14.0 percentage points from September 2020 to May 2026. Geology fell 13.6 points, Internal Revenue Agent 12.4, General Physical Science 10.9 and Tax Examining 10.1.

Several also expanded their younger share. Soil Science's under-35 share rose 7.8 points. Tax Examining rose 6.6 points. General Physical Science and Internal Revenue Agent each rose 3.5 points. Forestry's age-55-plus share fell 8.9 points while its under-35 share increased 4.2 points.

These changes can reflect hiring, retirement, other separations, reclassification or changes in agency coverage. They do not show that every skill pipeline is healthy. But they are decisive counterevidence to the claim that all federal occupations are simply getting older.

What a defensible succession-risk dashboard would track

No public dataset can predict an individual's retirement, and an agency should not try to infer personal intentions from age. A defensible workforce plan works at the aggregate level.

For each mission-critical occupation, agencies would ideally track:

* age and service distributions, without labeling broad age groups eligible; * recent retirement, quit and transfer actions; * time to proficiency, certification or delegated authority; * internal promotions and developmental-program completions; * announcement, applicant, referral, selection and acceptance rates; * geographic and agency concentration; * knowledge-transfer coverage for specialized work; and * the effects of automation, contracting and classification changes.

The public evidence provides only part of that chain. OPM employment data shows stocks. Personnel-action data shows processed flows. USAJOBS shows public recruiting activity. It does not show every applicant, selection, noncompetitive appointment, internal detail, training milestone or retirement intention.

That missing information matters most in specialized occupations. Replacing a retiring employee is not necessarily a one-for-one transaction. A newly hired aviation inspector, judge, physician or technical program manager may arrive with substantial outside experience but still need agency-specific authorities, systems knowledge and case familiarity. An entry-level hire may require a longer development path. A contractor may perform support work without assuming inherently governmental decisions. Succession capacity therefore depends on the time and method required to produce proficiency, not only the number of people entering and leaving a series.

That is enough to reject two easy narratives. The first is that every occupation with many employees over 55 is on the edge of collapse. Aviation Safety's visible recruiting activity shows why that is too broad. The second is that a low median age means low turnover risk. Enhanced-retirement populations show why that is wrong.

The strongest public warning is narrower: some occupations combine a high age concentration, long service, substantial recent retirement actions and almost no visible replacement recruiting. Administrative Law Judges and Claims Assistance and Examining meet all four conditions in the latest data. Mail and File, Telecommunications and Technical Systems Program Management show different combinations of contraction, age, service and limited pipeline.

Those are not predictions that named employees will leave. They are planning signals that agencies can test against their internal workforce and hiring records.

Methodology and limitations

FederalHiringData analyzed OPM detailed employment data for May 2026 and required at least 500 employees for the main occupation ranking. June 2026 was excluded because OPM reports that its June employment data is missing about 83,000 Defense records across 32 components.

Estimated median age is the weighted median of OPM's five-year age bands using band midpoints. The open-ended 65-plus band is top-coded at 67 for display. Shares age 55-plus and 60-plus use the published bands directly.

The joint age/service measure counts records in the 60-64 and 65-plus bands that also report at least 20 years of federal service. It is not a retirement-eligibility estimate. Exact age, creditable service, retirement system and covered special service are unavailable.

Historical comparisons use the September 2000, 2010 and 2020 OPM legacy FedScope employment cubes plus May 2026 current data. Occupation definitions, agency coverage and reporting can change across that span.

Retirement actions include OPM categories for voluntary, early-out and other retirement during calendar 2025. Personnel actions are not necessarily unique people and do not mechanically reconcile to point-in-time headcount.

Recruiting comparisons use distinct FederalHiringData announcement control numbers opened from Jan. 1 through Aug. 29 in 2024, 2025 and 2026. Current counts are fresh USAJOBS Search API totals captured Aug. 29. The official Historic JOA API was queried as a bounded cross-check; several smaller series returned incomplete-looking zero windows, so those zeros are not interpreted as no recruiting. Local and official totals are not combined.

Policy context comes from OPM's FERS eligibility guidance, retirement computation guidance and workforce and succession planning resources. Governmentwide workforce-change context comes from the Government Accountability Office.

Research and writing used no OpenAI API calls.

Readers can browse current federal jobs, examine federal workforce statistics, compare federal agencies, or read more FederalHiringData investigations.