Our Company

An interdisciplinary team for an
ever-changing world.

We are engineers, scientists, planners, and landscape architects committed to sustainable environmental solutions. The success of our practice is rooted in responsiveness, innovation, and strong relationships — and in our belief that people and nature thrive best when they thrive together.

Our mission

To address environmental and social challenges with sustainable solutions.

Jonathan Reiner

Jonathan Reiner

Planning Director

“I have been working with Horsley Witten for 15+ years on numerous projects in multiple states and municipalities, and they are second to none.”

“We have worked together on projects ranging from simple to incredibly complex, including land use and open space planning; water resource use, protection, and planning; long range and comprehensive planning; and consensus building.”

Different perspectives, deeper work.

We recognize that our differences in identities, perspectives, and lived experiences give us a more profound outlook on our work.

Horsley Witten Group is committed to building an equitable and inclusive community within our offices and in our communities.

Our DEI committee's goals align with our Mission, Vision, and Values, and a multi-year action plan keeps us moving toward those goals — not just naming them.

Our vision

We envision a world where people and nature thrive together.

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Our values

10 principles that guide our work.

We aim to build trust through our passion, determination, and high-quality work. We strive to be a firm where individuals grow, contribute, and belong.

  • 01. Nature

    Respect for healthy ecosystems is the foundation. We seek work that protects or restores natural systems — "water is life."

  • 02. Commitment

    Our work requires a commitment to our clients, communities, and mission to not only bring projects to successful completion but to affect positive change.

  • 03. Integrity

    We only take on work that clearly benefits people or the environment. This can require difficult conversations, and we bring an honest, professional perspective to these discussions.

  • 04. Sustainability

    Every project, office, and decision is weighed against a long horizon and a changing climate.

  • 05. Education

    We build the capacity of clients and communities to keep going after our work is done. We also continue our own education to evolve with changing issues and technology.

  • 06. Innovation

    New problems need new approaches. We're patient with the time good ideas take to land.

  • 07. Inclusion

    Elevating the voices of historically harmed communities is central to creating sustainable ones.

  • 08. Collaboration

    Working in teams across disciplines and sharing ideas, stories, and insights is at the core of our practice internally as well as with our clients and partners.

  • 09. Giving Back

    Donating time, services, and support to the places we live and work is part of who we are.

  • 10. Communication

    Thoughtful, open, honest, and clear communication is fundamental to our daily project management approach and our long-term relationship building with our clients, partners, and staff.

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Our history

Thirty-five years of partnerships.

From two small New England offices to a five-office firm with Caribbean reach, our work has scaled but we remain true to our core values.

  • Organization Founded

    Organization Founded

    Horsley Witten Hegemann Inc. opens its first offices in Barnstable and Cambridge, MA. Early projects in Hyannis, Nantucket, and Walpole.

  • Our Company

    Test 1992

    Horsley Witten Hegemann Inc. opens its first offices in Barnstable and Cambridge, MA. Early projects in Hyannis, Nantucket, and Walpole.

  • Collaboration

    Test 2007

    Horsley Witten Hegemann Inc. opens its first offices in Barnstable and Cambridge, MA. Early projects in Hyannis, Nantucket, and Walpole.

  • Education

    Test 2020

    Horsley Witten Hegemann Inc. opens its first offices in Barnstable and Cambridge, MA. Early projects in Hyannis, Nantucket, and Walpole.

  • Climate Cover

    Test 2026

    Horsley Witten Hegemann Inc. opens its first offices in Barnstable and Cambridge, MA. Early projects in Hyannis, Nantucket, and Walpole.

Awards

Notable Achievements

We’re honored for recognition for our work across a range of markets.

See All Awards

Work With Us

Have a unique challenge that needs a sustainable solution?

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