Providing innovative solutions for a better future

You can rely on our team of consultants to address your environmental challenges
in every market that we serve, worldwide.

Technical excellence, true collaboration, and innovation are the foundation
of every project we complete.

Our Markets

Additional Markets

HMMH is a trusted leader in the study, assessment, and mitigation of the impacts of new and existing transportation projects on communities.


Recent Blog Posts What We’ve Learned About Hosting Virtual Public Meetings During COVID-19

In this COVID-19 era, virtual meetings have become the new norm. Like most companies, HMMH quickly learned to adapt to virtual…

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Recent News Mary Ellen Eagan Named Recipient of 2020 ACC Board of Directors Chair Award

Congratulations to our President and CEO, Mary Ellen Eagan, on receiving the 2020 Airport Consultants Council (ACC) Board of Directors Chair…

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Recent Presentations & Papers White Paper – Building Back Sustainably From COVID-19

There is no question that the COVID-19 pandemic has devastated the aviation industry. Reduced flights, closed borders, and the public’s hesitancy…

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HMMH has supported Massport for over 30 years providing technical analyses for a wide variety of projects at our airports. I confidently recommend HMMH to provide high quality environmental services in a timely and efficient manner. They are truly experts in their field.

- Senior Project Manager, Massachusetts Port Authority

HMMH did a first-rate job. The results of the study were exactly what we were looking for to help strike a balance between the rights of residents and the need for a local business to thrive and foster the area’s tourism industry. HMMH would be my first call when faced with a similar problem in the future.

- Page County Administrator, Shenandoah, VA

HMMH’s efforts were instrumental in the Authority’s ultimate success in providing an outstanding project that exceeded FAA requirements, met our noise-impacted community’s expectations and stayed within our budget. I would highly recommend HMMH to any airport that demands a successful, transparent and quality project.

- Former (Retired) Director, Airport Noise Mitigation, San Diego Regional Airport Authority

HMMH's understanding of state and federal requirements along with their responsiveness to project needs make HMMH the gold standard in their field.

- Project Manager, Stantec

HMMH is an extremely professional firm with excellent response time. Work is always of the highest caliber. The firm is trusted and respected by our citizens, staff and the Board of County Commissioners.

- Airport Director, Martin County Airport

HMMH consistently provided high quality products and their advice was invaluable in guiding the JPDO's effort to frame important policy issues to key government decision makers.

- Project Manager, JPDO

There is no other firm, in my opinion, that ranks as high as HMMH in their knowledge and expertise in all noise matters both nationally and internationally.

- Former (Retired) Director, Office of Environmental Services, Maryland Aviation Administration