Miller, Mark

Miller, Mark, doing business as Miller Cleaning Services, is a sole proprietor providing janitorial and facilities maintenance services to federal agencies as a prime contractor operating exclusively under small business set-asides. Based in Colusa, California, Miller Cleaning Services competes in NAICS 561720 (Janitorial Services) and holds a Federal Contractor status registered since 2005, with all 39 recent prime awards designated as Total Small Business Set-Asides.

Miller Cleaning Services' customer footprint is heavily concentrated with one agency: the Department of Agriculture Forest Service, Pacific Southwest Region (Region 5) dominates both volume and dollars. This regional Forest Service office accounts for 31 of 39 awards (90% of the award count) and $1.4 million of the $2.4 million combined potential value across the entire portfolio — an overwhelming concentration that makes the vendor functionally a single-customer, single-region contractor. The Army Corps of Engineers San Francisco District represents the second-largest dollar source at $346.5 thousand on a Lake Sonoma facilities janitorial contract awarded September 21, 2025, and operates as an incumbent with a prior contract of $387.6 thousand. The Department of Commerce National Oceanic and Atmospheric Administration, the Department of Agriculture Forest Service Intermountain Region (R4), and the Pacific Southwest Research Station round out a thin customer base. Representative work spans five years of awards across ranger districts and national forests in California: a $102.2 thousand janitorial services contract at the Truckee Ranger District awarded May 1, 2024; a $140 thousand contract covering the Beckwourth Ranger District, Mt. Hough Ranger District, and Plumas National Forest Supervisors Office awarded February 2, 2024; a $346.5 thousand Lake Sonoma facilities contract with the Army Corps of Engineers awarded September 21, 2025; and a $10.5 thousand Almanor Ranger District purchase order awarded March 2, 2026.

Activity has been episodic rather than growth-oriented. Award volume peaked at six awards each in 2021 and 2024, with only one award each in 2023, 2025, and 2026 — a pattern indicating a steady-state portfolio of recurring, multi-year contracts rather than growing pipeline. The vendor faces modest recompete pressure: two awards (combined potential value $171 thousand) reach ultimate completion within the next twenty-four months. Miller Cleaning Services operates exclusively as a prime contractor with no subcontract footprint, and does not sit on government-wide vehicles, IDIQs, GWACs, or BPAs. The entire portfolio consists of firm fixed-price delivery orders and definitive contracts with multi-year base-plus-option structures, all performing within California, Nevada, and a limited geographic footprint tied to Forest Service administrative regions. The vendor's business model centers on incumbent janitorial services at regional federal facilities, with strong past-performance relationships offsetting thin customer diversity.