Prime · United States
Day & Zimmermann
HQ Philadelphia
Day & Zimmermann is a privately held engineering, operations, maintenance, staffing, security, and defense contractor.
- SubsidiaryAmerican Ordnance
About Day & Zimmermann
Day & Zimmermann's Government Services division includes Mason & Hanger and SOC, which provide engineering, security, facilities operations, logistics, and staffing to government and commercial customers. Its munitions business includes American Ordnance, which the company identifies as the operating contractor at the government-owned Iowa Army Ammunition Plant and storage facilities at Milan Army Ammunition Plant. In June 2026, Day & Zimmermann announced a U.S. Army award for operations, maintenance, and modernization at government-owned Hawthorne Army Depot. The company’s Philadelphia headquarters and contracted government sites are distinct; the depot facilities are not company-owned.
Federal Prime Contracts$3.15B obligated · FY2008–FY2026
- Obligated
- $3.15B
- FY2008–FY2026
- Contract actions
- 3,818
- 969 awards
- Peak year
- FY2023
- $695M
- Top buyer
- U.S. Army
- 100% of obligations
Show as table
| Fiscal year | Obligated | Actions | Awards |
|---|---|---|---|
| FY2026 (to date) | $217M | 90 | 63 |
| FY2025 | $233M | 177 | 113 |
| FY2024 | $345M | 160 | 94 |
| FY2023 | $695M | 391 | 212 |
| FY2022 | $116M | 192 | 118 |
| FY2021 | $114M | 200 | 122 |
| FY2020 | $259M | 269 | 165 |
| FY2019 | $282M | 306 | 189 |
| FY2018 | $315M | 251 | 135 |
| FY2017 | $169M | 243 | 125 |
| FY2016 | $97.1M | 397 | 258 |
| FY2015 | $77.7M | 244 | 144 |
| FY2014 | $53.4M | 197 | 118 |
| FY2013 | $35.9M | 89 | 60 |
| FY2012 | $36.2M | 57 | 34 |
| FY2011 | $19.7M | 51 | 33 |
| FY2010 | $44.2M | 117 | 66 |
| FY2009 | $24.6M | 165 | 98 |
| FY2008 | $16.9M | 222 | 153 |
Top buyers
- U.S. Army$3.14B 100%
- U.S. Navy$7.9M 0.3%
- U.S. Air Force$33K 0.0%
Defense programs
- 40MM AMMUNITION ALL TYPES$123K 0.0%
- 1000$44K 0.0%
- F-14D$42K 0.0%
- 1AIA$4K 0.0%
- 1FCN$1K 0.0%
- 1AHA$0 0.0%
- 1FVI−$6K -0.0%
- 1FVA−$198K -0.0%
Only actions coded to a DoD acquisition program.
What they sell (PSC)
- Ammunition, Over 125MM$1.70B 54%
- Operation of Ammunition Facilities$610M 19%
- Ammunition, 75MM Through 125MM$285M 9.1%
- Ammunition, Over 30MM Up to 75MM$237M 7.5%
- Demolition Materials$161M 5.1%
- Launchers, Rocket and Pyrotechnic$110M 3.5%
- Housekeeping- Facilities Operations Support$41.2M 1.3%
- Pyrotechnics$3.5M 0.1%
- Housekeeping- Warehousing/Storage$2.2M 0.1%
- Maint/Repair/Rebuild of Equipment- Ammunition and Explosives$1.8M 0.1%
- R&D- Defense System: Weapons (Engineering Development)$1.5M 0.0%
- R&D- Defense Other: Ammunition (Applied Research/Exploratory Development)$1.0M 0.0%
- Guided Missile Warheads and Explosive Components$794K 0.0%
- Housekeeping- Guard$686K 0.0%
- Hardware, Weapon System$579K 0.0%
- All other−$7.3M -0.2%
Industry (NAICS)
- Ammunition (Except Small Arms) Manufacturing$2.49B 79%
- Facilities Support Services$644M 20%
- Explosives Manufacturing$15.3M 0.5%
- Small Arms Ammunition Manufacturing$1.3M 0.0%
- Other Ordnance and Accessories Manufacturing$1.1M 0.0%
- Dog and Cat Food Manufacturing$40K 0.0%
- Engineering Services$7K 0.0%
Where the work is done
- Iowa$3.12B 99%
- Tennessee$35.8M 1.1%
- Maryland$40K 0.0%
- Oklahoma$38K 0.0%
- California$15K 0.0%
- Kansas$0 0.0%
Contract pricing
- Firm Fixed Price$2.02B 64%
- Fixed Price with Economic Price Adjustment$571M 18%
- Cost Plus Fixed Fee$513M 16%
- Cost No Fee$44.9M 1.4%
- Fixed Price Redetermination−$416K -0.0%
Competition
- Full and Open Competition After Exclusion of Sources$1.76B 56%
- Full and Open Competition$876M 28%
- Not Competed$514M 16%
- Not Competed Under SAP$1.5M 0.0%
- Competed Under SAP$467K 0.0%
Largest awards10
- M795 Tnt - Award of FY16 Requirements.American Ordnance · U.S. Army · USAspending ↗$270MSep 27, 2016
- Award of FY20 Requirements for the M795 Tnt 155MM Projectile.American Ordnance · U.S. Army · USAspending ↗$229MSep 28, 2020
- Order W519TC25F0357 Is for the Contractor to Load, Assemble, and Pack A Quantity of 388,436 155MM M795 Tnt Loaded Projectiles.American Ordnance · U.S. Army · USAspending ↗$197MSep 18, 2025
- Ukraine: Multi-year, UCA Delivery Order for M1128 Lap ProjectilesAmerican Ordnance · U.S. Army · USAspending ↗$193MSep 27, 2023
- Order W519TC24F0399 Is for the Contractor to Load, Assemble, and Pack A Quantity of 346,478 155MM M795 Tnt Loaded Projectiles.American Ordnance · U.S. Army · USAspending ↗$158MSep 24, 2024
- Order W519YTC26F0141 Is for the Contractor to Load, Assemble, and Pack A Quantity of 225,862 155MM M795 Tnt Loaded Projectiles.American Ordnance · U.S. Army · USAspending ↗$125MJun 30, 2026
- Ukraine: (FMS Funding) the Purpose of This Delivery Order Is for the Purchase of M231 and M232A2 Propelling Charges.American Ordnance · U.S. Army · USAspending ↗$121MSep 9, 2024
- 40MM High Velocity Day Night Thermal Training CartridgesAmerican Ordnance · U.S. Army · USAspending ↗$102MJun 25, 2015
- Minimum Guarantee for the Contractor to Set Up A 155MM Projectile Load, Assemble, Pack Line at the Day and Zimmerman - Kansas Facility.American Ordnance · U.S. Army · USAspending ↗$91.0MFeb 15, 2023
- This Contracts Awards A Firm Fixed Price, Base Plus Four Option Periods Contract to American Ordnance, LLC for the Production of Various 81MM/120MM Prop Charges.American Ordnance · U.S. Army · USAspending ↗$80.2MJul 10, 2009
Signed obligations on federal prime contracts (award types A–D) from USAspending, FY2008 through Oct 9, 2026. Obligations are money the government committed, not company revenue, and include de-obligations. Subcontracts and grants are excluded. Matching is by registered UEI.
Supply Chain2 facilities
Facilities2
| Facility | Kind | Location | Status | Confidence |
|---|---|---|---|---|
| Day & Zimmermann corporate headquarters | Headquarters | Philadelphia, Pennsylvania, United States | Operating | Confirmed |
| Hawthorne Army Depot (U.S. Army site; D&Z contract awarded 2026) | Other | Hawthorne, Nevada, United States | Operating | Confirmed |
- Day & Zimmermann corporate headquartersHeadquarters · Philadelphia, Pennsylvania, United StatesOperatingConfirmed
- Hawthorne Army Depot (U.S. Army site; D&Z contract awarded 2026)Other · Hawthorne, Nevada, United StatesOperatingConfirmed
Hiring Observations
Use the official careers site for current openings and application requirements.
Sources5
Profile3
- 1
Day & Zimmermann · Supports Organization
“is an integrated provider of mission support solutions through our architecture and engineering, global security, operations and maintenance, and staffing”
- 2
Day & Zimmermann · Supports Organization
“American Ordnance LLC (AO) is a premier manufacturer of ammunition to the United States Military. AO is the operating contractor”
- 3
Supply chain2
- 4
- 5CompanyDay & Zimmermann Awarded Contract for Hawthorne Army Depot Operations, Maintenance and Modernization
Day & Zimmermann · Supports Facility, Organization
“The award marks a return to Hawthorne for Day & Zimmermann”
Government identifiers1
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