Callaghan Brian C

Callaghan Brian C, a sole proprietorship based in Ann Arbor, Michigan, provides medical expert witness and case review services to the federal government as a prime contractor under Blanket Purchase Agreements with the Department of Health and Human Services and task orders from the Department of Justice, competing exclusively on non-set-aside procurements with predominantly total-small-business set-aside BPA task orders.

Callaghan operates as a single-person medical expert specializing in clinical analysis, medical record review, expert testimony, and consulting services. The vendor's federal footprint centers entirely on the Vaccine Injury Compensation Program (VICP) administered by HHS HRSA, with ancillary expert witness work for the Department of Justice Civil Division. The primary NAICS classification is Offices of Physicians (except Mental Health Specialists), though 78 awards also carry Administrative Management and General Management Consulting Services coding. All 209 awards in the source data fall under PSC code Support—Professional: Expert Witness.

The vendor's customer concentration is extreme. HHS HRSA Headquarters accounts for 202 of 209 awards (97% by count) and $16.5 million of the $16.52 million combined potential value. The Department of Justice Civil Division holds the remaining 7 awards, valued at $18 thousand. All HHS HRSA work flows through Blanket Purchase Agreements. The largest parent vehicle is BPA 75R60222A00041 (September 2022 award, ceiling $7.5 million through September 2027), which has generated 77 task orders valued at $535 thousand. A second major BPA, 75R60221A00035, issued in April 2021 with a $249,999 ceiling running through April 2026, has produced 54 task orders valued at $236 thousand. A third BPA, 75R60218A00026, carries $165 thousand across 65 task orders. Task order values are small and highly granular—individual VICP case reviews typically range from $750 to $22,125 on firm fixed-price terms. The vendor recently received a new $7.5 million VICP/Countermeasures Injury Compensation Program BPA awarded May 15, 2026, with performance through May 2031.

Activity has declined sharply. The vendor received 46 awards in 2022, 31 in 2023, 23 in 2024, 9 in 2025, and only 4 in 2026 year to date. Recompete exposure is minimal: only 3 awards with ultimate completion dates within the next twenty-four months carry a combined potential value of $86 thousand. The source does not identify the vendor as holding any set-aside certifications, and the preponderance of task orders carry total-small-business set-aside designations despite the vendor being a sole proprietorship with no stated minority, disadvantaged, or VOSB ownership attributes.

The vendor has no subcontract footprint and holds no secondary vehicle positions. All work is direct from HHS HRSA or DOJ on small, case-specific task orders. Combined obligated dollars are $1 million (6% of potential value), reflecting the task-order-based nature of VICP work: each order is obligated at award, and the low dollar velocity indicates most orders are completed at or below their ceiling values. The vendor operates solely from Ann Arbor, Michigan, with services performed nationwide as required by individual case assignments.