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What We Do We Serve So Our Communities Thrive.

At MacKay Sposito, we understand that successful projects require more than technical skills—they demand strategic thinking, regulatory knowledge, and the willingness to look beyond the horizon to deliver a future we can all be proud of.

 Curving paved path through a landscaped park with boulders and a rock cairn labeled “Sticks N’ Stones,” surrounded by evergreen trees under a clear blue sky, with a snow-capped mountain in the distance.
  • MacKay Sposito team members relax and chat in a casual office lounge during a social, with one person smiling and holding a plate of snacks.

    Connection

    At the heart of what we do is our people and the relationships they’ve built over hundreds of projects and multiple decades.

  • MacKay Sposito field crew surveying a construction site, with three workers in high-visibility vests—one kneeling to mark the ground, one holding a GPS survey rod, and one recording measurements—amid dirt mounds under a clear sky.

    Cohesion

    Experts in each of our chosen fields, we rely on honest communication, spirited collaboration, and total trust in each other’s abilities to multiply our strengths and elevate our performance as an integrated team.

  • Aerial view of a sprawling suburban neighborhood with curving streets and rows of dark-roofed houses, centered around a large grassy park and small ponds, surrounded by forested hills under a cloudy sky.

    Community

    Whether we’re designing a major arterial, surveying on a mountain pass, or navigating complex entitlement processes, we never lose sight of the ultimate goal: enhancing the communities of our people, our clients, and our neighbors.

Our Services

Riparia Environmental

Operating as an integrated partner and subsidiary of MacKay Sposito, Riparia Environmental performs expert installation, monitoring, and maintenance of MacKay Sposito’s environmental designs. Riparia is dedicated to building resilient ecosystems through an extensive suite of natural resource-based environmental services.

Learn More at Riparia

Four MacKay Sposito team members review site plans beside a Riparia Environmental pickup during a roadside field visit.
Four MacKay Sposito team members review site plans beside a Riparia Environmental pickup during a roadside field visit.

Riparia Environmental

Operating as an integrated partner and subsidiary of MacKay Sposito, Riparia Environmental performs expert installation, monitoring, and maintenance of MacKay Sposito’s environmental designs. Riparia is dedicated to building resilient ecosystems through an extensive suite of natural resource-based environmental services.

Learn More at Riparia

Signature Projects