Willdan Group is a provider of professional technical and consulting services, primarily serving utilities, private industry, and public agencies across various levels of government. The company operates mainly within the Energy and Engineering and Consulting segments, generating most of its revenue from the Energy sector. Its services encompass a wide range of offerings, including audits, surveys, program design, master planning, benchmarking analysis, design engineering, construction management, and performance contracting. Willdan Group also focuses on advancements in software and data analytics to enhance its service delivery. The company is dedicated to key markets such as energy, infrastructure, municipal engineering, economic analysis, and homeland security, with all revenue generated from domestic sources.
Alternative Power Generation is a specialized engineering, procurement, and construction company. It focuses on designing, consulting, and building clean energy infrastructure, including solar and wind power plants, electric vehicle charging stations, and energy storage systems. The company primarily serves cooperative utilities, independent system operators, and other clients seeking reliable and resilient energy alternatives.
Alpha Inspections
Acquisition in 2025
Alpha Inspections, based in Clermont, Florida, specializes in professional building inspection services. The company works with municipalities, offering building department solutions and planning reviews to ensure construction projects adhere to relevant codes and regulations. Their services prioritize efficiency and regulatory expertise, aiming to provide the highest level of service to their clients.
Enica Engineering
Acquisition in 2024
Enica Engineering is a firm that specializes in providing a variety of engineering services, including automation system design, metering system design, and life-cycle analysis. The company aims to connect current project delivery methods with advanced engineered systems. Its comprehensive offerings encompass specialty services, project development, project execution, and field engineering, along with consulting. Enica Engineering serves a diverse clientele, including medical campuses, universities, pharmaceutical companies, hospitals, telecom organizations, and industrial manufacturers, helping them successfully navigate the complexities of construction projects.
Onsite Energy
Acquisition in 2019
Onsite Energy Corp. is a firm focused on energy efficiency services and project implementation, primarily serving industrial facilities and utilities. The company specializes in conducting energy efficiency audits, feasibility studies, and project scoping and specification. Additionally, Onsite Energy manages the implementation of energy projects and assists with the procurement and administration of energy efficiency incentives. The firm is dedicated to enhancing profitability for its clients by identifying and executing economically viable energy efficiency and generation initiatives.
The Weidt Group
Acquisition in 2019
The Weidt Group, Inc. is a provider of energy consulting and software development services, focusing on analysis and consulting for utility companies, manufacturers, architects, engineers, evaluators, and policymakers. The firm develops software tools and virtual products that help model and manage the complexities of the built environment. Their offerings support improved decision-making throughout various stages, including pre-design, product selection, and post-occupancy evaluations. By leveraging data and advanced software solutions, The Weidt Group aims to enhance energy efficiency and optimize resource use across multiple sectors.
Lime Energy
Acquisition in 2018
Lime Energy Co. specializes in designing and implementing energy efficiency programs for utilities across the United States. Founded in 1997 and headquartered in Newark, New Jersey, the company is recognized as the largest direct install firm in the country. Lime Energy provides a comprehensive range of services aimed at enhancing energy efficiency for small and mid-sized commercial and industrial clients. Its offerings include energy-efficient lighting upgrades, mechanical upgrades, and various utility program management services such as program design, customer recruitment, and project implementation. The company focuses on delivering predictable energy-saving products and services, thereby helping businesses reduce energy-related expenses and minimize their environmental impact. Lime Energy Co. operates as a subsidiary of Willdan Energy Solutions, Inc. since 2018.
Newcomb Anderson McCormick
Acquisition in 2018
Newcomb Anderson McCormick, Inc. is an energy engineering and management consulting firm based in San Francisco, California, founded in 1983. As a subsidiary of Willdan Group, Inc., the company focuses exclusively on addressing energy and sustainability challenges for both public and private sector clients. Newcomb Anderson McCormick offers a wide range of services, including energy program development and management, energy engineering and due diligence, renewable energy solutions, energy storage, distributed generation, and strategic energy planning. With a strong foundation in technical expertise, the firm aims to assist utilities, government agencies, and private sector organizations in navigating and resolving critical energy-related issues.
Integral Analytics
Acquisition in 2017
Integral Analytics, Inc. is an analytical software and consulting firm based in Cincinnati, Ohio, founded in 2005. The company specializes in providing data analytics and software solutions for the energy industry, focusing on engineering, statistics, and operations research. Integral Analytics offers a range of products, including LoadSEER, which helps allocate land-use growth control totals, and IDROP, a tool for optimizing resource dispatch at a systems level. Other notable offerings include the Demand Side Management Option Risk Evaluator for financial analysis of demand-side management programs, and DRPricer, which assists in determining the fair value of program participation options. The company also provides grid-scale battery valuation software and WindStore, which manages uncertainties between supply and demand systems. Integral Analytics supports utility customers in assessing greenhouse gas reductions from energy efficiency and renewable energy programs. As of July 2017, Integral Analytics operates as a subsidiary of Willdan Energy Solutions, Inc.
Intergy
Acquisition in 2009
Energy is a critical necessity to the modern world. What used to be taken for granted is now a precious resource, and California has embarked on the largest energy efficiency effort in world history. Planning to spend billions of dollars to conserve energy and maintain the state's role as the world's leader in technology and science, the governor and the California Public Utility Commission, along with the investor-owned utilities are directing enormous resources towards energy efficiency, conservation and sustainability. Founded in 2003 by two Northern California entrepreneurs, Intergy is ideally suited to play a critical role in the state's energy efficiency efforts. The company brings together over two decades of experience in the energy and information technology fields, offering innovative solutions to challenging resource problems.
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