Chappelle Mechanical Services LLC

Chappelle Mechanical Services LLC, a Lorton, Virginia-based small business operating as a for-profit limited liability company, supplies HVAC repairs, steam and chilled water system maintenance, plumbing infrastructure work, and general construction services to federal agencies almost exclusively as a prime contractor (97% of recent awards) on full-and-open solicitations with no SBA set-asides. The vendor competes primarily on task orders issued against blanket purchase agreements rather than standalone definitive contracts, and holds no federal contract vehicle seats beyond its direct NIH prime relationships.

Chappelle's customer concentration is near-total with the National Institutes of Health. The top customer, NIH Construction, accounts for 122 awards (97% of recent award count) valued at $42.5 million combined potential value, leaving all other agencies marginal. Within NIH, the Office of Logistics and Acquisition Operations, Clinical Center, and Office of the Director together contribute 12 awards and approximately $1.8 million in potential value. Non-NIH activity is minimal: the Smithsonian Institution appears on four awards valued at $85 thousand combined. This concentration shapes the vendor's entire operating model — the business functions as a dedicated NIH campus-maintenance contractor serving the Bethesda facility ecosystem.

Chappelle's capability portfolio is narrowly specialized. Representative work across the recent award history includes a $553 thousand repair and service contract for seven dehumidifier systems in Building 38 (awarded September 2025), a $460.6 thousand repair contract for two air handling units and two rooftop units in Building 14H (awarded April 2022), a $336.8 thousand variable frequency drive replacement and construction contract covering Buildings 35 and 50 (awarded August 2023), a $314.5 thousand domestic hot water heater installation in Building 38A (awarded June 2024), and a $294 thousand steam system repairs and upgrades contract for Building 10-65 (awarded May 2026). The vendor delivers recurring maintenance, component replacement, emergency repairs, and specialized facility support across multiple NIH research buildings — typical award scopes run $15 thousand to $400 thousand per task order, with firm fixed pricing and completion windows of three to six months.

Chappelle holds two active blanket purchase agreements with NIH Construction. The primary vehicle, awarded July 1, 2026 (BPA 75N99026A00007), carries a $30 million ceiling and extends through June 30, 2031, authorizing general construction, handyman services, mechanical system repairs, HVAC installations and upgrades, plumbing work, steam and condensate system maintenance, chilled water system services, and specialized equipment installation across NIH Bethesda and related locations. The second vehicle, awarded April 27, 2022 (BPA 75N99022A00016), operates as a single-award BPA with no specified ceiling but over $2.5 million in cumulative task order awards through April 25, 2029. A third older BPA (75N99019A00010) continues to generate task orders. Combined, these three vehicles support 113 of the vendor's recent task orders and approximately $13.1 million in combined potential value.

Activity has accelerated sharply in 2026. Awards per year climbed from 20 in 2022 to 35 in 2026 (the source captures January–September 2026 only), indicating sustained or growing demand for Chappelle's core services at NIH. However, the recompete horizon presents material exposure: 17 awards with ultimate completion dates in the next twenty-four months carry combined potential value of $2.3 million, representing single-award or limited-competition task orders that will require rebid or extension negotiation. The April 2022 BPA vehicle, which anchors much of the older award base, expires April 25, 2029; the July 2026 vehicle's five-year term provides longer runway, but competition for NIH's mechanical services often defaults to the incumbent unless NIH Construction issues a new solicitation or expands the pool.

Chappelle operates almost exclusively as a prime contractor; subcontractor activity is negligible. The vendor holds only five sub-award records spanning 2022–2024, involving work as a mechanical or HVAC subcontractor to larger primes (3D Envirologics, Jacobson Electrical Contracting, Total Environmental Concepts, and Fannon Petroleum Services) on NIH corridor renovations and building-system projects. Service Contract Inventory reporting shows minimal federal services activity above the $150 thousand threshold — 20 SCI records across four fiscal years, all routed through other prime contractors' service contracts, yielding approximately 1.3 to 1.6 FTEs of reported federal services labor per year. This SCI footprint reflects only a small subset of Chappelle's actual federal revenue, which is concentrated in the BPA task orders captured in the prime contract award portfolio. The vendor's real workforce and revenue scale substantially exceed SCI's visibility, driven by its role as a dedicated NIH facilities prime.

Chappelle competes in a narrow, specialized niche dominated by one customer and one contract vehicle family. The vendor has no presence on government-wide acquisition contracts (GWACs), agency schedules, or other multi-agency vehicles, and subcontracts only incidentally. This configuration limits diversification risk but creates acute recompete and customer-concentration exposure. The business model is sustainable only if NIH Construction continues to task Chappelle at comparable volume and rates; loss of the primary BPA or displacement on the July 2026 vehicle would eliminate the vendor's federal pipeline.