Engineering Services during Construction

Tetra Tech’s engineering services during construction promote sustainable operations and maintenance (O&M) for defense agencies through effective construction oversight, commissioning, and handover.

Tetra Tech provides engineering services during construction for the full range of military project requirements, from simple repair projects at domestic sites to complex rehabilitation and construction projects at challenging and remote installations.

We work closely with our clients during construction, providing program management, design during construction, construction oversight, and commissioning. Through these activities, we help to drive on-schedule, on-budget, and high-quality performance by closely monitoring construction activities and holding contractors accountable for following design plans and specifications. Our solution-focused oversight teams respond quickly to resolve issues to reduce the risk of performance delays and cost overruns.

Program Management

We work as an extension of our clients’ staff to ensure successful project delivery by providing:

  • Owner’s representative services
  • Program controls
  • Risk register maintenance
  • Financial and schedule management, disbursement tracking
  • In-progress design reviews
  • Bid document and procurement support
  • Program closeout support

Design during Construction

We revise and enhance designs to accommodate changing conditions in the field by providing:

  • Shop drawing review approval for extension of design
  • Technical evaluation of requests for information (RFIs)
  • Coordination of design changes
  • Validation of field changes

Construction Oversight

We provide approval monitoring, reviewing, and processing to keep projects on budget and on schedule. We routinely mobilize teams from across our global network to provide responsive construction phase services no matter the project location. These services include:

  • Quality assurance/quality control
  • Document control and progress reporting
  • Construction surveillance, witnessing, and inspection testing
  • Construction submittal review
  • RFI and change request processing and review
  • Progress payment recommendations preparation
  • Substantial completion observation and documentation
  • As-built plan and O&M manual approval
  • Defects liability period monitoring
  • Handoff after warranty period


We verify that facilities and infrastructure yield optimum results and achieve desired outcomes. Tetra Tech’s commissioning experts provide full management services for testing, maintenance instruction, design review, and environmentally sustainable design for various project types. These services include:

  • Whole building commissioning
  • Continuous, ongoing, and monitor-based commissioning
  • Re-commissioning and retro-commissioning
  • Critical facilities commissioning
  • Commissioning to meet environmental design standards, including LEED, BREEAM, and Green Star
  • Operations review and planning
  • Measurement and verification