Day & Zimmermann

Founded in 1901, Day & Zimmermann is a prominent family-owned enterprise operating within the architecture, engineering, design, and construction sectors. The company provides comprehensive lifecycle solutions, including defense contracting, nuclear facility maintenance, and specialized engineering services. By integrating technical expertise with robust project management, Day & Zimmermann supports critical infrastructure and government operations globally. Their long-standing presence in the industry underscores a commitment to delivering value-driven, full-service security and facility management solutions for diverse corporate and public sector clients.

With a workforce of Over 10,000 employees, the organization maintains a significant operational footprint across 22 locations. Day & Zimmermann leverages its extensive scale to provide specialized engineering staffing, decontamination services, and radiological support. Their operational model emphasizes turnkey project execution, ensuring that complex technical requirements—ranging from demolition and scaffolding to installation and security management—are met with high-caliber precision. This operational capacity allows the firm to serve as a primary contractor for large-scale utility and government projects, maintaining high standards of safety and technical compliance across all service lines.

Day & Zimmermann competes with major industry players such as HII, BrandSafway, and Akima, positioning itself as a versatile provider in the competitive engineering and defense landscape. The firm’s ability to adapt to evolving market demands, such as nuclear support and facility management, remains a core differentiator. Meet Day & Zimmermann's team to explore the leadership driving these strategic initiatives. By focusing on long-term client partnerships and technical excellence, the company continues to solidify its reputation as a foundational entity in global infrastructure andView more...