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Founded more than a century ago on ground-breaking engineering and design services, we continue that legacy of innovation offering a comprehensive range of services, from concept through to the commissioning of grassroots facilities, retrofits, and upgrades.

  • Conceptual engineering
  • Front-end loading
  • Process simulation
  • Digital asset and project management
  • Piping design and specification
  • 3D design and laser scanning capabilities
  • Process Hazards Analysis (PHA/HAZOP) and facilitation
  • Detailed design
  • Commissioning, start-up, and operator training
  • Balance of plant (BOP) projects/utilities/infrastructure
  • Capital project/program management
  • Equipment, bulk material, and subcontract procurement
  • Safety controls
  • LOPA and safety integrated level (SIL) analysis
  • Relief device analysis, sizing, and validation

Flexible execution strategies include site-based teams, in-plant staff augmentation and seconded personnel, and office-based project execution.

Proven Engineering Alliance Contracts

An alliance contract with the right engineering partner is a proven method of controlling costs, improving productivity, and maximizing ROI. Day & Zimmermann has long-term alliance contracts with industry leaders who recognize the value of an engineering partner who delivers innovative solutions and sustainable value.