Industries & Sample Projects

Markets and Clients

Industries We Serve

Willdan forms partnerships with communities to engage and challenge them to build environments that will promote opportunity, wellbeing, and sustainability.


Modernize infrastructure including administration buildings, fire and police stations, streetlighting, and wastewater

K-12 Schools

Create comfortable and efficient classroom environments, while saving energy and maintenance costs

Higher Education

Develop sustainable campuses, with central plant, buildings, athletic complexes, and residence solutions


Address humidity and indoor air quality, develop energy efficient central plants and redundancy for critical systems

Commercial & Industrial

Help property owners implement improvements for office buildings, manufacturing plants, data centers and hotels

Aquatic Centers

Modify air distribution to resolve indoor air quality deficiencies , improve occupant comfort, and save energy

Highlighted Projects

Below are examples of clients we work with to transform their facilities and address their building needs.

City of Lawrence Engineering for Sustainability

City of Lawrence, KS

Engineering for Sustainability

Willdan worked with all stakeholders to help the City of Lawrence resolve its aging infrastructure problems and reduce its maintenance backlog by several years. Willdan implemented a comprehensive scope that addressed their priorities and reduced annual energy costs by over $400,000.

Pueblo County Schools

Pueblo County School District 70

Engineering for Success

Pueblo County School District 70 (Pueblo) recently selected Willdan as the design-build lead for facility improvements totaling up to $76 million. These contracts follow a collaborative effort between Pueblo and Willdan to develop a district-wide, 15-year master plan to maintain and update 19 schools and four district buildings. This energy performance contract work was secured in partnership with the Colorado Energy Office, where Willdan installed measures that delivered 1,794,000 kWh in annual savings and improved environmental conditions. . Willdan helped Pueblo secure a BEST grant and a voter-approved bond measure to fund these design-build upgrades. A majority of the funds will go toward major mechanical, electrical, and plumbing improvements, and $6.3 million will be devoted to infection control, COVID-19 mitigation measures, and district-wide security enhancements.

Marshak Science Tower Energy Upgrades

Marshak Science Building Rehabilitation

NYC College Saves 1.3 MWh/Year

The City College of New York Marshak Science Building is located on the upper west side of Manhattan. Built in 1971, this 13-story 600,000 sq. ft. high-rise houses research and teaching labs, office space, a library, an auditorium, and a gymnasium with a pool. To address indoor air quality issues resulting from an aging infrastructure, Willdan is implementing a comprehensive multi-phase project that includes assessment, design, and construction management to renovate the facilities.

Two of the four project phases are nearly complete, including the installation of a new building management system, retrofits of low-flow fume hoods, and new make-up air systems for the building’s laboratories. This project has already saved The City College of New York $55.4 million to replace failing systems, and provided an annual energy savings of over 1,325,000 kWh. Additionally, these upgrades have improved building air quality and addressed environmental control issues.

BSA Hospital Long-Term Central Plant Solutions

BSA Hospital – Amarillo, TX

Long-Term Central Plant Solutions

Willdan worked collaboratively with BSA Hospital to develop a comprehensive master plan for the facility’s aging support systems and energy consuming assets for over 1M sq. ft. of facilities. The master plan ensures that any future facility support system solution that BSA Hospital invests in will set the facility’s long-term budget and infrastructure in a practical, cost-effective, and well-planned position. For the first phase of work, Willdan was able to fully design a solution for their failing boiler plant that fit within the context of the overall central plant master plan to ensure a long-term, sustainable solution.

Hilton San Diego Bayfront Hotel

Hilton San Diego Bayfront Hotel

Energy Efficiency Plan

Working closely together, the Hilton San Diego Bayfront Hotel and Willdan developed an implementation plan that substantially reduced the baseline energy consumption, without disrupting hotel guests. Even with increased guest occupancy, meal service, laundry processing, and ballroom and meeting space utilization, these measures have reduced the hotel’s energy use more than 15% in just nine months. San Diego Gas & Electric honored the Hilton San Diego Bayfront Hotel with its 2014 Energy Champion Award for outstanding conservation efforts in the hospitality segment—establishing the hotel as a recognized leader in the implementation of energy efficiency projects in the San Diego region.

King County Aquatic Center

King County Aquatic Center

A Pool Fit for an Olympian

The King County Aquatic Center is one of the largest indoor competitive swimming facilities on the West Coast. Willdan implemented an innovative approach to replace aging systems and reengineer and reconfigure building system operations to increase energy savings. Willdan resolved persistent chloramine and carbon dioxide build-up issues at the pool’s surface, to substantially improve indoor air quality throughout the facility. Willdan also installed a ground-breaking 103 kW solar PV system, comprised of 100% Made-in-Washington panels—the largest array of U.S.-made panels in the state at that time.

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