MAINSTREAM ENGINEERING CORP — United States · Federal contract register · Supplier record: 563 contracts, all years ($231,669,885 · Dec 1999 – Jun 2026); $57.5M since January 2024 (67 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 in the USAspending register”, https://assay-systems.com/register/us/mainstream-engineering-corp/
563
contracts, all years
$231,669,885 · Dec 1999 – Jun 2026
$57.5M
since January 2024
67 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
$22.3M
$16.8M
20192020202120222023202420252026
Who buys from MAINSTREAM ENGINEERING CORP
since January 2024
4agencies
$57.5Mpaid
60.2%top buyer
General Services Administration60.2%
$34,592,245
Department of Defense39.2%
$22,513,452
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.
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
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.