Assessment, Exercise, and Modeling and Simulation Support (AEMSS)
Active Master IDIQ Awarded
- Federal agency
-
Defense Threat Reduction Agency
- Awardees
- 5
- Task orders
- 10
- Obligated
- $266,050,701
Vehicle facts
- Opportunity
-
- DTRA - Assessment, Exercise, and Modeling & Simulation Support Pre-Solicitation · HDTRA120R0006 · Posted Oct 28, 2019
- Agency
-
- Defense Threat Reduction Agency Department of Defense
- Combined task order value
-
- $367,139,873 Current, with exercised options
- $686,093,118 Potential, with all options
- Last date to order 86% complete
- Shared ceiling 31% used
- $850,000,000.00
IDV award and task order details come from SAM.gov/FPDS.
About this vehicle
The Defense Threat Reduction Agency established a multiple-award Master IDIQ for Assessment, Exercise, and Modeling and Simulation Support on July 13, 2022, with a shared ceiling of $850 million across two contractor pools (large business and small business, up to three awards each). Orders may be placed through July 12, 2027, leaving approximately eleven months of ordering authority remaining.
The vehicle structure reserves capacity for small-business primes with annual requirements under $4 million, yet all ten task orders awarded to date carry no set-aside designation and flow to four large primes: Parsons Government Services Inc., Applied Research Associates Inc., Valiant Global Defense Services Inc., and Black & Veatch Special Projects Corp. Parsons dominates by potential value at $343.1 million across three orders; Applied Research Associates holds the second-largest share at $187.4 million across two orders. The remaining two primes split $159.3 million combined. DTRA is the sole customer agency across the portfolio.
Awarded task orders span vulnerability assessments, red cyber operations and tools development, blue cyber assessment, red team assessments, exercise planning, special operations forces training support, and counterproliferation program coordination. Work is priced under cost-plus-fixed-fee and firm-fixed-price models. Task-order potential values range from $315,621 to $137.6 million, with durations extending to 2030. Combined task-order potential value stands at $689.8 million, with $254.7 million obligated to date—37 percent of the vehicle's shared ceiling.
Ordering velocity has declined: five orders in 2023, two in 2024, three in 2025. The most recent award (June 23, 2025) was a $26.7 million military exercise planning order with a June 2030 completion date. Three task orders awarded in early 2025 collectively carry potential value exceeding $230 million and reflect DTRA's continued reliance on contractor support for cyber assessment, red operations planning, and training services. With roughly twelve months remaining in the ordering window and $160.2 million of ceiling still unobligated, the vehicle remains active but approaching closure.
IDV awards
Latest task orders
Top awardees by obligations
| Rank | Awardee | Obligated | Share |
|---|---|---|---|
| 1 | Parsons Government Services Inc. | $134,631,385 | 51% |
| 2 | Applied Research Associates, Inc. | $90,655,900 | 34% |
| 3 | Valiant Global Defense Services Inc. | $40,446,794 | 15% |
| 4 | Black & Veatch Special Projects Corp. | $316,622 | <1% |
Top funding agencies by obligations
| Rank | Funding agency | Obligated | Share |
|---|---|---|---|
| 1 | Defense Threat Reduction Agency | $266,050,701 | 100% |
Obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2026 | $67,309,115 |
| FY2025 | $77,510,360 |
| FY2024 | $68,359,056 |
| FY2023 | $49,400,094 |
Quick answers
What is the AEMSS contract vehicle?
Assessment, Exercise, and Modeling and Simulation Support (AEMSS) is an indefinite delivery, indefinite quantity (IDIQ) contract vehicle run by Defense Threat Reduction Agency (Department of Defense), awarded on July 13, 2022.
Which companies hold AEMSS?
5 companies hold AEMSS's IDV awards, one each. The latest went to Valiant Global Defense Services Inc. on July 13, 2022. The awardees whose task orders obligated the most are Parsons Government Services Inc., Applied Research Associates, Inc. and Valiant Global Defense Services Inc.
How much has been spent through AEMSS?
10 task orders have been placed under AEMSS, obligating $266,050,701. Their combined current value, with exercised options, is $367,139,873.
What is the shared ceiling of AEMSS?
AEMSS's shared ceiling is $850,000,000; its task orders have used 31% of it.
Which agencies use AEMSS the most?
The departments whose task orders under AEMSS obligated the most are Defense Threat Reduction Agency ($266,050,701).
How much was obligated through AEMSS in fiscal year 2025?
Task orders under AEMSS obligated $77,510,360 in fiscal year 2025.
On GovTribe
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