Day & Zimmermann

Legal name, DBA and former names

• The firm is named Day & Zimmermann.Source: dayzim.com/about · As of 2026-10-11

Identifiers (UEI, state registrations)

• SAM UEI JV1NFDGGB4S4 (as shown on the USAspending recipient record) and Texas TBPELS firm no. 4236.Source: usaspending.gov/recipient/871d3c2e-a65c-bb19-06… · As of 2026-10-11

Ownership type

• Family-owned, as described on the firm's own website.Source: dayzim.com/about · As of 2026-10-11

Employee count or band

• The firm states it has 32,000 employees, per the firm's site.Source: dayzim.com/about · As of 2026-10-11

Services and markets

• The firm provides construction and engineering, operations and maintenance, staffing, security, and defense services to corporations and governments.Source: dayzim.com · As of 2026-10-11

Leaders

• Harold Yoh, III, Chair and CEO.Source: dayzim.com/about/leadership · As of 2026-10-11
• Kathleen King, Senior VP Finance and CFO.Source: dayzim.com/about/leadership · As of 2026-10-11
• Lisa Ann Cooney, SVP, Chief Legal Officer and Corporate Secretary.Source: dayzim.com/about/leadership · As of 2026-10-11
• Sankara 'Vishi' Viswanathan, Senior VP and CIO.Source: dayzim.com/about/leadership · As of 2026-10-11

Licences (board records)

• Texas TBPELS roster lists DAY & ZIMMERMANN INTERNATIONAL INC (firm no. 4236, type NS, expires 2028-01-31)Source: tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip · As of 2026-10-04

Federal awards (contracts)

• USAspending recipient record THE DAY & ZIMMERMANN GROUP, INC (Philadelphia, PA), contract award obligations: FY2021 $270,994,279, FY2022 $247,557,043, FY2023 $555,147,017, FY2024 $206,066,647, FY2025 $-94,909,483 (award types A to D; obligations as published, including modifications and negative adjustments)Source: usaspending.gov/recipient/871d3c2e-a65c-bb19-06… · As of 2026-10-11

Rankings and awards

• Listed in the ENR 2026 Top 500 Design Firms.Source: enr.com/toplists/2026-top-500-design-fi… · As of 2026-10-05

News timeline

• 2026-09-29: Jason Dunaway was appointed to the National Safety Council Board of Directors.Source: dayzim.com/news · As of 2026-10-11
• 2026-09-21: Josh Walsh was named to lead American Ordnance & Operations at Iowa Army Ammunition and Milan Army Ammunition Plants.Source: dayzim.com/news · As of 2026-10-11

Sources of record

1. https://www.dayzim.com/about
2. https://www.usaspending.gov/recipient/871d3c2e-a65c-bb19-0637-ee1feb016a8b-P/latest
3. https://www.enr.com/toplists/2026-top-500-design-firms-4
4. https://www.dayzim.com/
5. https://www.dayzim.com/about/leadership
6. https://tbpedownloads.s3-us-west-2.amazonaws.com/roster_firm.zip
7. https://www.dayzim.com/news