# Patrick Callahan

> Patrick Callahan is the CEO of Alquist 3D, a Greeley, Colorado company at the front of the 3D concrete printing industry. A West Point-era Army infantry officer turned defense-industry executive, he took the helm in October 2023 and steered the startup from emerging-technology curiosity into a commercial force, landing a landmark partnership with Walmart to 3D print store expansions across the country. He pairs two decades of defense business development - where he captured hundreds of millions in contracts at Critical Solutions International and AirBoss Defense Group - with a mission to make building faster, cheaper, and safer.

- **Role:** Chief Executive Officer at Alquist 3D
- **Organizations:** Alquist 3D, AirBoss Defense Group, Critical Solutions International, QinetiQ North America, United States Army
- **Nationality:** American
- **Education:** BA; Distinguished Honor graduate, Army ROTC (2002), Cornell University, MA and MS, Simmons University, MBA, Babson College
- **Known for:** Took Alquist 3D from emerging technology to commercial deployment with national retailers, Secured landmark 3D concrete printing partnership with Walmart for store expansions, Completed an 8,000-square-foot Walmart expansion in Owens Cross Roads, Alabama, printing 16-foot walls in roughly 75 hours with a five-person crew

## Career timeline

- **2002-2011** — Infantry officer, United States Army; multiple deployments in the Global War on Terror
- **Pre-2012** — Director of Business Development, Survivability Division at QinetiQ North America; closed contracts exceeding $800 million
- **2012-2014** — Chief Strategic Officer at Critical Solutions International, directing international growth, business development and R&D
- **2014-2020** — CEO of Critical Solutions International; captured $500M in contracted business and established CSI as prime contractor for U.S. Foreign Military sales
- **2020-2023** — CEO of AirBoss Defense Group; led COVID-19 task force working with the White House, HHS, CDC and FEMA, generating $780M in new contracts
- **2023-10** — Appointed CEO of Alquist 3D as founder Zachary Mannheimer moved to chairman
- **2025** — Led 3D concrete printing partnership with Walmart, completing Alabama Supercenter expansion
- **2025-2026** — Launched A1 and A1X concrete printer brands and scaled Walmart projects nationwide

## Achievements

- Took Alquist 3D from emerging technology to commercial deployment with national retailers
- Secured landmark 3D concrete printing partnership with Walmart for store expansions
- Completed an 8,000-square-foot Walmart expansion in Owens Cross Roads, Alabama, printing 16-foot walls in roughly 75 hours with a five-person crew
- Launched the A1 (education/entry-level) and A1X (on-site construction) concrete printers
- Captured $500M in contracted business as CEO of Critical Solutions International
- Drove $780M in new contracts at AirBoss Defense Group during the COVID-19 response
- Distinguished Honor graduate of Cornell University Army ROTC (2002)

## Latest updates

- **2025-05** — Alquist completed a 3D concrete printed expansion of a Walmart Supercenter in Owens Cross Roads, Alabama.
- **2025-12** — Walmart and Alquist deepened their partnership; first of a dozen-plus 2026 projects scheduled to begin in Lamar, Missouri.
- **2026-02** — Greeley-based Alquist profiled as a leading 3D construction printing company.

## Links

- Website: https://alquist3d.com
- LinkedIn: http://www.linkedin.com/in/patrick-t-callahan-1589a644
- Twitter/X: https://twitter.com/Alquist3D
- Facebook: https://facebook.com/Alquist3D/

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Profile page: https://yespress.io/patrick-callahan
Published by YesPress — https://yespress.io
Last updated: 2026-06-21