United States · Federal contract register · Supplier record

MAINSTREAM ENGINEERING CORP

Line: Refrigeration and air conditioning components (4130)Register loaded to September 2026Compiled 17 October 2026

MAINSTREAM ENGINEERING CORP — United States · Federal contract register · Supplier record: 564 contracts, all years ($232,313,576 · Dec 1999 – Jul 2026); $58.1M since January 2024 (68 contracts · 4 agencies); 3rd rank in the line (of 614 suppliers · 8.26%); 11 agencies never served ($17.0M on the line without MAINSTREAM ENGINEERING CORP).

Assay record ASY-US-1L82ULO110 · Cite as: Assay Systems, “MAINSTREAM ENGINEERING CORP: 68 government contracts in the United States since 2024”, https://assay-systems.com/register/us/mainstream-engineering-corp/

564
contracts, all years
$232,313,576 · Dec 1999 – Jul 2026
$58.1M
since January 2024
68 contracts · 4 agencies
3rd
rank in the line
of 614 suppliers · 8.26%
11
agencies never served
$17.0M on the line without MAINSTREAM ENGINEERING CORP

Own record by year

2019 onward
$13.5M
$15.4M
$8.5M
$11.6M
$10.4M
$18.4M
$23.0M
$16.8M
20192020202120222023202420252026

Who buys from MAINSTREAM ENGINEERING CORP

since January 2024
4agencies
$58.1Mpaid
59.5%top buyer
General Services Administration59.5%
$34,592,245
Department of Defense39.8%
$23,157,143
National Aeronautics and Space Administration0.5%
$299,089
Environmental Protection Agency0.2%
$100,000

Before 2024 only: Department of Homeland Security, Department of Transportation, Department of the Interior.

Won without a rival

2023-10-11 – 2026-07-09
44uncontested awards
42%of its awards
1without a competition
43single bid

MAINSTREAM ENGINEERING CORP won 44 of its 104 public contract awards in United States without a rival from 2023-10-11 to 2026-07-09, worth $15.5M: 1 without a competition and 43 after a competition that drew a single bid. 6 buyers awarded it without a rival, the largest Defense Logistics Agency with 26.

Buyers: Defense Logistics Agency (26) · Department of the Air Force (6) · Missile Defense Agency (5) · Department of the Navy (4) · Department of the Army (2) · Defense Microelectronics Activity (1)

Every uncontested award of MAINSTREAM ENGINEERING CORP · United States: all uncontested awards

The line

since January 2024
$423Mline value
5,605contracts
17agencies
614suppliers
72.6%held by top ten

Refrigeration and air conditioning components (4130)

$104M
$240M
$78.5M
202420252026Jan–Sep
3rdof 614 suppliers
$34,923,044MAINSTREAM ENGINEERING CORP in the line
8.26%share of the line
96.4%of $35,879,823 spent by General Services Administration
0.1%of $363,703,117 spent by Department of Defense

Agencies that buy the line and never bought from MAINSTREAM ENGINEERING CORP

11agencies
245contracts
$16,956,589since January 2024
Department of Veterans Affairs48 contracts
$6,157,634
Department of Justice52 contracts
$4,363,581
Department of State89 contracts
$2,468,812
Department of Health and Human Services16 contracts
$1,958,108
Department of Agriculture18 contracts
$805,437
U.S. Agency for Global Media2 contracts
$376,036
Department of Commerce5 contracts
$360,710
Social Security Administration3 contracts
$254,332
Department of the Treasury10 contracts
$168,875
Department of Energy1 contract
$21,555
Smithsonian Institution1 contract
$21,509

How the line is bought

by value, since 2024
41%no competition
15%one applicant
0of these to MAINSTREAM ENGINEERING CORP
Competed, several suppliers applied3,549 contracts
$182,536,646 · 43.2%
Awarded directly, no competition741 contracts
$175,146,536 · 41.4%
Competed, one supplier applied1,315 contracts
$65,104,698 · 15.4%

Contracts reaching their end dates

Oct 2026 – October 2027
325contracts
$76,000,851end by October 2027
81end in November 2026 · $7.3M
21in agencies never served · $3.9M
$2.2M
$7.3M
$7.7M
$4.6M
$3.6M
$5.9M
$3.1M
$9.0M
$29.4M
$2.0M
$830K
$277K
Oct 2650 contractsNov 2681 contractsDec 2660 contractsJan 2738 contractsFeb 2727 contractsMar 2718 contractsApr 2712 contractsMay 2713 contractsJun 2715 contractsJul 276 contractsSep 274 contractsOct 271 contract

Fastest-growing supplier in the line

same line
+392%growth

Supplier UEI SLD5KEGGLLZ3

2024 to Sep 2026
$151,094,493
2022–2023
$30,696,840

The extract

Every buying office, every contract holder, value, number and end date behind the figures above.

Request extractSee a sample extract

Source: USAspending.gov, U.S. Department of the Treasury, Bureau of the Fiscal Service, usaspending.gov, accessed 30 September 2026.The data is available to copy, adapt, redistribute, or otherwise use for non-commercial or for commercial purposes (USAspending.gov, Licensing); no Dun & Bradstreet data is shown.