Longenecker & Associates Joins Geosyntec

Natick, MA (December 17, 2025) – Longenecker & Associates (L&A), a solutions provider supporting the important missions of the U.S. Department of Energy (DOE) joins Geosyntec, a global leader in environmental engineering and consulting.

This strategic acquisition accelerates Geosyntec’s growth in the federal sector, broadens service capabilities, and expands global market access for the combined organizations.

L&A is a woman-owned small business recognized for its extensive expertise in supporting DOE’s national security, environmental remediation, nuclear power and scientific discovery missions. L&A brings a strong set of core capabilities in areas like project delivery, mission and regulatory assurance, and operations support that complement Geosyntec’s rich history in environmental management and remediation across federal, industrial and international markets.

Majdi Othman, PhD, PE, President and CEO of Geosyntec, said, “L&A has built an exceptional reputation as a trusted partner to the U.S. Federal government and the private sector, particularly in areas of national security, environmental remediation and clean energy. This acquisition strengthens our ability to support complex energy and environmental challenges across the United States and internationally. I’m excited about what we can pursue together.”

“When we began in the commercial nuclear power business 36 years ago, we offered solutions to regulatory and operating issues. Since that time, L&A has evolved to become one of the premier businesses supporting the vital national security, environmental, and energy missions of our clients,” L&A CEO John Longenecker said. “Throughout our history, the core focus has remained on our values, maintaining a team of outstanding people, and our dedication to solving some of the nation’s most significant challenges. Combining our team with the outstanding strengths and capabilities of Geosyntec will allow us to expand and strengthen our ability to address the challenges of today and the future.”

Closing is anticipated later this year. Together, the firms will deliver integrated expertise to federal clients, advancing critical missions in energy, environment, and national security.

For more details about this transaction click here.

Morrissey Goodale, a specialized management consulting and research firm exclusively serving the architecture, engineering, and environmental consulting industries, initiated and advised Longenecker & Associates in the transaction.

Source: Geosyntec