Mechanical Business Holdings LLC
Plainfield, IL Kirwan Mechanical Service
- UEI
- RLSNRHSSCAN9
- CAGE
- 91WS7
- Primary NAICS
- 561210 Facilities Support Services
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Other NAICS codes in SAM.gov
-
- 221210 Natural Gas Distribution
- 221310 Water Supply and Irrigation Systems
- 221330 Steam and Air-Conditioning Supply
- 238210 Electrical Contractors and Other Wiring Installation Contractors
- 238220 Plumbing, Heating, and Air-Conditioning Contractors
- 423610 Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
- 423690 Other Electronic Parts and Equipment Merchant Wholesalers
- 541330 Engineering Services
Show all 13
- 541350 Building Inspection Services
- 541990 All Other Professional, Scientific, and Technical Services
- 811210 Electronic and Precision Equipment Repair and Maintenance
- 811310 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
- 811412 Appliance Repair and Maintenance
- SAM.gov registration date
- Physical address
- 23840 W Industrial Dr S, Plainfield, IL 60585, USA
- Website
- kirwanmechanicalservice.com
- Industry
-
- Industrials
- Capital Goods
- Construction & Engineering
- SIC code
- 76 Miscellaneous Repair Services
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $439,933 |
| FY2025 | $26,760 |
| FY2024 | $26,760 |
| FY2023 | $22,200 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Justice | $439,933 |
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Voris Mechanical Inc. | Glendale Heights, IL | 238220 Plumbing, Heating, and Air-Conditioning Contractors |
| Prime Coat II LLC | Waukegan, IL | 238320 Painting and Wall Covering Contractors |
| Brock Construction Inc. | Chicago, IL | 236220 Commercial and Institutional Building Construction |
| Corporate Office | Lombard, IL | 238990 All Other Specialty Trade Contractors |
| Miller Proctor Nickolas Inc. | Sleepy Hollow, NY | 333414 Heating Equipment (except Warm Air Furnaces) Manufacturing |
About the company
Mechanical Business Holdings LLC, Kirwan Mechanical Service Division, a woman-owned small disadvantaged business based in Plainfield, Illinois, delivers building automation system maintenance, HVAC repair, and specialized facility infrastructure services to the Federal Bureau of Prisons as a prime contractor exclusively under small-business set-asides and full-and-open competition. The company operates as a for-profit limited liability company and competes across Total Small Business set-asides and unrestricted procurements; across its 21 recent awards, roughly two-thirds carried Total Small Business designations.
Kirwan's customer footprint is entirely concentrated within the Bureau of Prisons: 20 of 21 awards ($610 thousand combined potential value) flow to the Metropolitan Correctional Center Chicago, with one additional award ($7 thousand) routed through the BOP North Central Regional Office. This concentration reflects an exclusive, sustained service relationship with MCC Chicago spanning since at least 2022. Work is grounded in facility infrastructure maintenance and repair — building automation system quarterly service contracts form the bulk of the award base, supplemented by specialized capital projects. Recent representative work includes a $218 thousand definitive contract (August 2026, Total Small Business set-aside) for glycol loop exchanger repair involving replacement of Hybrid Fluid Cooler units and associated heat pump infrastructure, a $146 thousand definitive contract (October 2025, Total Small Business set-aside) for sewer line replacement, a $74 thousand purchase order (September 2022, Total Small Business set-aside) for an industrial mixing center (Model IMC80), and a $13 thousand purchase order (September 2022, Total Small Business set-aside) for bladder tank and thermal pressure valve work. Routine quarterly BAS maintenance contracts cycle at approximately $6,690 per quarter, with variations reflecting service scope and set-aside designation. The vendor also delivered contracted electrician services and radio room air conditioning work in 2026 under full-and-open procurements.
Work falls under primary NAICS 238220 (Plumbing, Heating, and Air-Conditioning Contractors) and PSC Z2NB (Repair or Alteration of Heating and Cooling Plants), with secondary capability in facilities support services and water and sewer line construction. All work is performed at Plainfield, Illinois. Activity trajectory shows modest variance — ranging from two awards in 2023 to six in 2026 — with no clear growth or decline pattern. Two awards ($251 thousand combined potential value) face ultimate completion within the next twenty-four months and thus expose Kirwan to recompete activity. The vendor holds no seats on government-wide vehicles, BPAs, or multi-agency IDIQs; all awards are direct purchase orders or definitive contracts from MCC Chicago.
Quick answers
Is Mechanical Business Holdings LLC registered in SAM.gov?
Yes. Mechanical Business Holdings LLC's SAM.gov registration is active through September 8, 2027.
How much has Mechanical Business Holdings LLC received in federal contracts?
Federal contracts obligated $26,760 to Mechanical Business Holdings LLC in fiscal year 2025 and $515,653 in fiscal years 2023 through 2027.
How does Mechanical Business Holdings LLC rank among federal contractors?
Mechanical Business Holdings LLC ranked #56 in PSC Z1NB in FY2025.
What is Mechanical Business Holdings LLC's most recent federal award?
Mechanical Business Holdings LLC's most recent federal contract award is Radio room a/c (15B40126P00000098), from Metropolitan Correctional Center Chicago (BOP), on October 19, 2026.
On GovTribe
See Mechanical Business Holdings LLC's full federal record
- Federal contract awards
- Funding analysis by agency, NAICS and set-aside
- Similar vendors