17 Federal Watchdog Offices Lost 1,787 Employees. 27 Inspector General Posts Are Vacant.

The federal government entered 2025 with two kinds of watchdog capacity: the people who audit, investigate and evaluate agencies, and the Inspectors General appointed or designated to lead their offices. Both layers have since thinned, but they are not the same problem.

FederalHiringData identified 17 Offices of Inspector General that the Office of Personnel Management labels consistently enough for a direct headcount comparison. Together, those offices had 9,940 employees in December 2024. By May 2026, they had 8,153, a decline of 1,787 employees, or 18.0%.

The leadership picture is separate. On Aug. 29, 2026, the Council of the Inspectors General on Integrity and Efficiency listed 27 vacant Inspector General posts among the 72 federal IG offices it describes. Eight vacancies—at Interior, State, Housing and Urban Development, the Environmental Protection Agency, Transportation, Energy, Education and the Office of Personnel Management—were listed at 579 days, dating their current vacancy periods to Jan. 27, 2025.

One number measures employees in a limited but consistent OPM panel. The other measures vacant leadership posts across the broader inspector-general system. Put together, they describe a federal oversight structure operating with fewer measurable career staff and unusually widespread leadership gaps after the January 2025 removals.

They do not prove that federal oversight stopped. CIGIE's governmentwide results moved in different directions in fiscal 2025: fewer reports, closed investigations and hotline complaints, but more prosecutions, civil actions and personnel actions than in fiscal 2024. Workload, case mix, money recovered and reports issued are not interchangeable productivity measures. The defensible conclusion is narrower: capacity fell in offices that can be measured, leadership continuity weakened across the system, and the public record does not yet show the full operational consequence.

The measurable workforce fell 18%

The Inspector General community is much larger than the 17-office panel. CIGIE reported about 13,800 employees working at more than 70 OIGs in fiscal 2025. OPM's public employment files, however, do not assign a distinct subagency code to every watchdog office. In many departments, OIG employees remain embedded in a larger organizational code that cannot be separated without guessing.

FederalHiringData therefore used only the offices that OPM identifies directly and consistently: the OIGs at Agriculture, Commerce, Defense, Education, General Services Administration, Health and Human Services, Homeland Security, Housing and Urban Development, Interior, Justice, Labor, Transportation, Treasury, Veterans Affairs, the Federal Housing Finance Agency, AbilityOne and the Treasury Inspector General for Tax Administration.

That panel is not “all federal watchdogs.” It is a reproducible slice that covers several of the largest offices and can be followed month by month.

The panel peaked at 9,969 employees in November 2024. It was only slightly lower, at 9,940, in December. By May 2026 it had lost 1,787 positions from the December baseline.

May is the endpoint for a technical reason. The Defense OIG subelement disappears from OPM's June 2026 file even though the office itself did not vanish. Including June would create a false cliff of more than 1,500 employees. FederalHiringData treats that as a classification break and stops the direct comparison in May.

Every one of the 17 offices was smaller in May 2026 than in December 2024. Defense OIG recorded the largest numerical decline, from 1,852 to 1,557. HHS OIG fell from 1,531 to 1,311, VA OIG from 1,172 to 954 and HUD OIG from 752 to 561.

The percentage losses varied. Treasury OIG—not TIGTA—fell from 220 to 151, a 31.4% decline. Education OIG declined from 203 to 147, or 27.6%. Agriculture OIG fell 17.2%, from 425 to 352. Small-office percentages can be especially volatile: AbilityOne OIG moved from nine employees to eight.

These are OPM headcounts, not budgeted full-time-equivalent positions. A budget can authorize one number while payroll shows another. Nor does the change reveal whether each departure was voluntary, directed, transferred or caused by an expiring appointment. The personnel-action data provides more context, but not a one-for-one bridge.

Auditors and investigators absorbed the largest losses

Inspector General offices combine several kinds of work. Auditors trace spending and controls. Criminal investigators build cases. Inspectors and evaluators test program performance. Attorneys advise on authorities and cases. Information-technology specialists support data systems and cyber work. Management analysts and administrative staff keep the offices operating.

The two largest occupational series also produced the largest measured declines. Auditing series 0511 fell from 3,010 employees in December 2024 to 2,529 in May 2026, a loss of 481. Criminal Investigation series 1811 fell from 2,382 to 1,999, a loss of 383.

Together, those two series accounted for 864 of the panel's 1,787-position decline—48.3%.

Management and Program Analysis series 0343 declined by 261, from 880 to 619. Information Technology Management series 2210 fell by 95, from 740 to 645. General Attorney series 0905 declined by 57, from 361 to 304. General Investigation series 1810 fell by 36, and Investigative Analysis series 1805 fell by 24.

The series do not map perfectly onto organizational divisions. An IT specialist can support an audit, an investigation or office administration. A management analyst can conduct evaluative work or internal operations. The chart therefore preserves OPM's exact occupational classifications rather than inventing a more precise functional allocation than the data supports.

The smallest pipelines also narrowed. The panel had 28 employees in the Administration and Office Support Student Trainee series in December 2024 and six in May 2026. Financial Administration and Program student trainees fell from 13 to zero; IT student trainees from 11 to one. Those are small numbers, but they matter because a workforce can lose both current capacity and entry routes at the same time.

Related research

Put this finding in context

All articles

Data investigations/August 26, 2026

DOJ's Attorney-Misconduct Office Received 1,666 Complaints. It Opened Seven Investigations.

DOJ's attorney-misconduct intake reached a 21-year high as OPR opened seven investigations and the separate inspector general lost 99 covered employees.

Cybersecurity/August 29, 2026

QTFY Targeted Federal Networks for Years. Four Named Agencies Later Lost 1,503 IT Employees.

FederalHiringData found four QTFY-targeted agencies lost 1,503 broad IT-management employees as public cyber controls and recruiting diverged.

Fiscal 2025 produced five separation actions for every accession

OPM recorded 311 accession actions and 1,656 separation actions for the 17-office panel in fiscal 2025. That is 5.3 separation actions for every accession action.

The prior fiscal year was much closer to balance: 914 accessions and 790 separations. Fiscal 2026 remained imbalanced through May, with 116 accession actions and 531 separation actions.

The action categories make the fiscal 2025 shift more concrete. OPM recorded 698 voluntary-retirement actions, 503 quits, 177 early-out retirements, 169 individual transfer-outs, 50 other separations, 36 expired-appointment or other terminations and 23 other retirements.

Those categories should not be added up and called 1,656 people. Personnel-action files count actions, not necessarily unique employees, and transfers can create a separation in one organization and an accession in another. Effective dates and reporting months can also lag workforce decisions.

September 2025 alone contained 715 separation actions in the panel. Headcount then fell from 9,220 in October's source month to 8,633 in November's. That timing is consistent with a concentrated departure period, but the public records do not support labeling every September action as a dismissal or attributing the entire subsequent headcount movement to one policy.

The age profile also argues against a retirement-only explanation. Employees age 55 and older fell from 2,107 in December 2024 to 1,575 in May 2026, a decline of 532. But employees under 35 fell from 1,166 to 836, a decline of 330. The 35-to-39 group fell by 417, while the 45-to-49 group was nearly unchanged, declining by only 20.

Tenure composition changed even more sharply at the entry side. OPM tenure category 2—career-conditional or otherwise probationary employees in the public coding—fell from 1,160 to 528, a 54.5% decline. The career category fell from 8,431 to 7,387, or 12.4%.

Tenure is not a departure reason. Employees can move from career-conditional to career status after completing requirements. Still, the combination of fewer accession actions, smaller trainee series and a much smaller category-2 population indicates a narrower replenishment pipeline, not simply an older workforce retiring at the margin.

Leadership vacancies are a different capacity problem

Career staff conduct the day-to-day work; Inspectors General lead the offices and protect their independence. A vacant IG post does not mean an office has no leadership. Acting officials can exercise authority, and career deputies often provide continuity. It does mean the confirmed or designated position is unfilled.

The current vacancy map is unusually broad. CIGIE's vacancy table listed 27 vacant posts on Aug. 29, 2026—37.5% of the 72 federal IG offices the council describes.

Eight of those vacancies were listed at 579 days: Interior, State, HUD, EPA, Transportation, Energy, Education and OPM. The date aligns with the immediate aftermath of the Jan. 24, 2025 removals.

The Congressional Research Service wrote days after those events that media outlets had reported the termination of more than a dozen confirmed and acting IGs without prior congressional notification. The Inspector General Act requires written notice at least 30 days before a removal or transfer, with a detailed, case-specific substantive rationale. CRS said those requirements appeared not to have been followed.

A Jan. 28 bipartisan letter from Senators Chuck Grassley and Dick Durbin sought office-specific explanations and information about acting leadership for 18 affected offices. The letter is evidence of what Congress requested, not an adjudication of every removal.

The vacancy table also contains older gaps unrelated to January 2025. Treasury's IG post had been vacant for more than seven years, the National Security Agency's for more than three, and AmeriCorps' for more than three. Treating all 27 vacancies as one event would erase that history.

The proper distinction is structural. The January removals expanded the number of offices led in an acting capacity. Separately, career staffing fell across the measurable panel during the following 16 months. Leadership status does not explain each employee departure, and the headcount data does not show what acting leaders could or could not do.

Recruiting had already been a continuous requirement

The historical USAJOBS archive shows that OIG hiring is not a one-time recovery project. From approximately March 2017 through December 2024, FederalHiringData counted 13,024 unique announcements tied to the 17 panel codes, Postal Service OIG and the Special Inspector General for the Troubled Asset Relief Program.

The archive is partial in 2017. It also counts announcements, not vacancies: one announcement can advertise one, many or an unspecified number of openings. It does not reveal applications, referrals, selections or people hired.

Annual announcements rose from 1,136 in the partial 2017 archive to 1,904 in 2022, then declined to 1,773 in 2023 and 1,531 in 2024. Defense OIG accounted for 2,006 announcements across the longer archive, VA OIG 1,973, Postal Service OIG 1,735, TIGTA 1,285 and HHS OIG 1,079.

FederalHiringData stops this exact-code trend at December 2024. Historical archive coverage and organization coding change sharply in 2025, making the apparent decline in exact-code announcements unusable as a recruiting trend. The transparent choice is to mark the break, not turn a source-system change into a headline.

The older series still establishes the baseline: watchdog offices depended on recurring public recruitment for auditors, investigators, attorneys, analysts and technical staff long before the 2025 workforce contraction. Rebuilding capacity would require more than posting announcements. The public data cannot show how many candidates applied, were referred or entered on duty.

Output held up in some areas and fell in others

CIGIE's annual reports provide the broadest governmentwide operating totals, but they are not a clean productivity panel. The number of offices changed from 73 in fiscal 2024 to more than 70 in fiscal 2025. Cases and audits can span years. A large recovery can dominate monetary totals. Hotline volume reflects public reporting as well as staff processing. Criminal outcomes depend on prosecutors and courts outside an OIG.

With those cautions, the comparison is still useful because it resists a simplistic collapse narrative.

Reports declined modestly. Closed investigations and hotline complaints declined more sharply. Prosecutions and civil actions increased. Personnel actions were nearly flat. None of those movements can be divided by 13,800 employees to produce a meaningful governmentwide productivity score.

The two annual reports also use rounded workforce language: “over 14,000” in fiscal 2024 and “about 13,800” in fiscal 2025. That supports direction, not a precise 200-person governmentwide decline. The 1,787-person figure comes only from FederalHiringData's consistent 17-office OPM panel.

There is documented strain at individual offices. The FDIC OIG's Fall 2025 semiannual report said its budget request sought to maintain a reduced staffing level of 123 positions and backfill seven necessary and critical positions for oversight and investigations in key risk areas. CIGIE reported that 22 OIGs lacked dedicated appropriations and that the fiscal 2026 president's budget request included funding for seven of them.

Those records show constrained staffing and funding structures. They do not prove that all 22 offices suspended audits or that every reduced office lost the same capabilities. FederalHiringData found no primary governmentwide record supporting a blanket statement that Inspector General functions had paused.

Funding comparisons require the same restraint as staffing comparisons. CIGIE placed the aggregate Inspector General budget at about $3.9 billion in both fiscal years 2024 and 2025, excluding classified intelligence-community budgets. A flat nominal total does not mean every office received the same resources, and it does not account for inflation, transfers, supplemental appropriations or differences between requested, enacted and obligated amounts. Some OIGs receive a distinct appropriation; others depend on a line within the agency they oversee. CIGIE's concern about 22 offices without dedicated appropriations is therefore about both stability and institutional independence, not a claim that all 22 received no money.

What changes when the watchdog bench becomes thinner

An 18% headcount decline does not translate mechanically into 18% fewer audits or investigations. Offices can reprioritize, finish multi-year cases, use shared data tools, narrow scopes, defer lower-priority work or draw on institutional knowledge. A smaller office can produce more prosecutions in a year if mature cases reach disposition.

The workforce composition still changes the options available to leaders. Losing 481 auditors affects the pool that can start or staff reviews. Losing 383 criminal investigators changes investigative coverage. Fewer IT specialists and management analysts can constrain data work, internal systems and program evaluation. A smaller entry pipeline can make vacancies harder to refill later, even if near-term output remains visible.

Leadership vacancies add another layer. Acting officials can preserve operations, but extended acting periods can complicate long-term planning, recruitment and the public perception of independence. The statutory notice process exists in part so Congress can assess how a leadership change could affect ongoing oversight.

The evidence does not establish motive or a single cause. Voluntary retirements and quits made up most recorded fiscal 2025 separation actions. Transfers, early-out retirements, terminations and other actions also contributed. Agency-wide workforce policies formed the environment, but public OPM records do not attach a policy label to each departure.

What the data establishes is a new baseline. By May 2026, the measurable OIG workforce was materially smaller than it had been before the 2025 transition. By late August, more than one in three IG leadership posts was listed as vacant. Aggregate output remained mixed rather than uniformly down.

That tension is the story of the federal watchdog system in 2026: less measurable staffing, thinner leadership continuity, and enough continuing work to make simple claims of either collapse or normalcy inadequate.

Methodology and limitations

FederalHiringData analyzed monthly OPM employment records from January 2015 through May 2026 for 17 OIG subelements that can be identified consistently. Headcount is the sum of employee-level OPM rows in each month. The December 2024-to-May 2026 comparison excludes June because the Defense OIG code disappears from that source file. Most federal OIGs cannot be separated in OPM public data and are not estimated.

Occupation, age and tenure comparisons use the same 17-office denominator and endpoints. Accession and separation series use OPM personnel-action records by federal fiscal year; fiscal 2026 is partial through May. Actions are not unique people. Tenure categories can change without an employee leaving.

Historical recruiting counts use one distinct USAJOBS control number opened from approximately March 2017 through December 2024 for the 17 panel agency codes plus Postal Service OIG and SIGTARP. SIGTARP is excluded from the workforce panel because the office sunset in March 2024. Announcements are not vacancies, applications, referrals, interviews, selections or hires.

CIGIE annual-report comparisons cover a broader and changing OIG universe. Budget FTE is not OPM headcount. Reports, investigations, hotline complaints, prosecutions, recoveries and questioned costs are not interchangeable productivity measures. Leadership vacancies are not career-staff vacancies.

Primary records include CIGIE's FY2024 and FY2025 annual reports, its current vacancy table, CRS's January 2025 legal overview, the Grassley-Durbin letter and FDIC OIG's Fall 2025 semiannual report. Research and writing used no OpenAI API calls.

Explore current federal job announcements, review federal workforce statistics, or read FederalHiringData's narrower investigation of the Justice Department's OPR and OIG workforce.