| W900KK25FA099 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $2,732,990 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | AC35 | Jul 25, 2025 | Jul 28, 2025 | Jul 27, 2027 |
| W900KK25F0004 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $1,582,368 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | 6625 | Nov 20, 2024 | Nov 19, 2024 | Nov 8, 2027 |
| W900KK23F0143 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $1,497,161 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | H299 | Sep 27, 2023 | Sep 29, 2023 | Apr 30, 2025 |
| W900KK23F0133 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $14,298,092 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | K058 | Sep 20, 2023 | Sep 20, 2023 | Aug 20, 2026 |
| W900KK23F0119 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $1,503,691 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | R499 | Aug 24, 2023 | Aug 28, 2024 | Feb 27, 2026 |
| W900KK23F0041 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $24,446,003 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | AC12 | May 15, 2023 | May 15, 2023 | May 14, 2028 |
| W900KK22F0129 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $1,478,662 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | 6695 | Sep 26, 2022 | Sep 26, 2022 | Sep 25, 2024 |
| W900KK22F0082 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $7,188,777 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | 6695 | Sep 16, 2022 | Sep 16, 2022 | Mar 31, 2025 |
| W900KK22F0069 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $5,896,698 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 334519 | 6695 | Jun 30, 2022 | Jul 27, 2022 | Oct 29, 2025 |
| W900KK22F0001 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $17,780,630 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Jan 28, 2022 | Jan 31, 2022 | Jul 30, 2025 |
| W900KK22F0002 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $22,770,547 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Dec 21, 2021 | Dec 20, 2021 | Jul 28, 2025 |
| W900KK21F0186 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $4,429,397 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Sep 28, 2021 | Sep 30, 2021 | Sep 29, 2024 |
| W900KK21F0180 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $15,172,693 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Sep 13, 2021 | Sep 15, 2021 | Jul 10, 2025 |
| W900KK21F0155 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $33,781,716 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Aug 10, 2021 | Aug 6, 2021 | Mar 13, 2026 |
| W900KK21F0153 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $29,464,652 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Jul 29, 2021 | Aug 2, 2021 | Aug 1, 2024 |
| W900KK21F0146 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $3,449,705 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Jul 9, 2021 | Jun 30, 2022 | Jun 30, 2022 |
| W900KK21F0128 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $10,892,402 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Jun 15, 2021 | Jun 15, 2021 | Jun 14, 2024 |
| W900KK21F0135 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $1,998,881 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Jun 7, 2021 | May 28, 2021 | Dec 31, 2023 |
| W900KK21F0134 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $2,682,230 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6675 | Jun 1, 2021 | Jun 2, 2021 | Nov 24, 2023 |
| W900KK21F0121 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $2,031,601 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | May 6, 2021 | May 7, 2021 | Nov 6, 2022 |
| W900KK21F0092 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $1,281,879 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Apr 28, 2021 | Apr 28, 2021 | Dec 31, 2022 |
| W900KK21F0076 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $389,681 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Apr 6, 2021 | Apr 9, 2021 | Dec 10, 2021 |
| W900KK21F0065 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $105,675,954 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Mar 22, 2021 | Mar 16, 2020 | Mar 22, 2026 |
| W900KK21F0059 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $4,131,139 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Mar 4, 2021 | Mar 4, 2021 | Mar 1, 2024 |
| W900KK21F0004 | SUSTAINABLE SYSTEM SOLUTIONS LLC | $16,591,257 | DEPT OF THE ARMY | US SECRET SERVICE | — | 334519 | 6695 | Oct 20, 2020 | Oct 22, 2020 | Jan 26, 2026 |