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Why Hennessey

We’re industry experts with local knowledge who understand the needs of your community.

When Timothy L. Hennessey began his business more than 50 years ago, he took pride in bringing best engineering practices to each project which resulted in positive outcomes for the communities he served. We continue that tradition by setting our standards high and exceeding our clients’ expectations. Today, Hennessey Engineers is a trusted partner to dozens of Southeast Michigan communities.

Our well-rounded team of experts moves projects forward with quick decision-making, localized solutions, and the administrative staff to support every milestone. Whether you’re looking for a project partner or career opportunities, Hennessey is ready to work with you.

“Since 2013, Hennessey Engineers and the City of Taylor have partnered together to provide substantial infrastructure improvements for this community. Their dedication and project leadership have been recognized by the City of Taylor's administration, city council, and residents, and we look forward to continuing that relationship into the future."Christopher GibbCity Engineer, City of Taylor

Our values


We do the work we set out to do, as simple as that.


On a Saturday, in the field, or face-to-face—we pride ourselves on being available to our clients.


We build solutions that work for all stakeholders, from the residents to the community leaders.


Our team’s decades of experience in the industry makes for quick, informed, expert decision-making.


We treat everyone like they’re part of our family.

A team of seasoned professionals

We’re able to move fast and work efficiently thanks to our team of experienced engineers, surveyors, construction specialists, project managers, grant specialists, and robust technical support. Every employee is driven by a desire to see their hard work come to life and enjoy the communities they helped build.