John C Phelps

John C Phelps, doing business as Phelps Diesel Service, is a self-certified small disadvantaged business sole proprietorship based in Eagar, Arizona, that delivers diesel engine repair, vehicle maintenance, and mechanic services with service trucks to the U.S. Forest Service as a prime contractor exclusively under small business set-asides and full-and-open vehicles.

Phelps Diesel Service operates entirely as a prime contractor (100% of recent awards) with no subcontract activity. The vendor specializes in diesel repair and vehicle maintenance to support federal wildland firefighting, emergency response, and lands management operations across Arizona, New Mexico, and surrounding areas in the Southwestern Region. Recent representative work includes a $24,500 firm fixed price delivery order to the Forest Service Region 3 for mechanic services with service truck support, issued June 11, 2026, under a total small business set-aside, a $57,001.45 delivery order for diesel repair and maintenance services awarded April 22, 2022, and multiple smaller task orders valued between $15,750 and $21,000 for vehicle maintenance and power generation support. Work is performed in Springerville, Silver City, and Chino Valley, Arizona, and subordinate locations across the southwestern region.

Customer concentration is hyperspecialized: the Department of Agriculture Forest Service accounts for 96% of recent awards across three organizational subdivisions. The Fire and Aviation Management National Interagency Fire Center leads by combined potential value at $818 thousand across six awards, while Region 3-Southwestern Region generates the highest award count at fourteen awards valued at $520 thousand combined. The vendor holds two Indefinite Delivery Contracts with $250,000 ceilings each through April 26, 2028 — one awarded February 6, 2026, under a total small business set-aside, and one established April 26, 2023, also under total small business set-aside. As of the source data, eight task orders have been issued under IDC 12837120T7027 ($201 thousand combined value) and four under IDC 1202SB23T7074 ($77 thousand combined value). The vendor also places work under two blanket purchase agreements: AG8371B177067 (three task orders, $73 thousand) and AG0306B088042 (two task orders, $13 thousand).

Activity remains light and episodic: one award in 2021, one in 2022, one in 2023, three in 2025, and two in 2026. Combined potential value across all twenty-four awards stands at $1.4 million, with $351 thousand obligated as of the source date (25% utilization). Award focus clusters on PSC Natural Resources/Conservation-Forest-Range Fire Suppression/Presuppression (twenty awards) and General Automotive Repair NAICS (twenty-three awards). The vendor has maintained continuous SBA registration since April 2004 and serves exclusively the Forest Service across its regional and national fire-management operations.