About Us

Our Mission

Manatus Development Partners, led by Justin Stern, is committed to transforming communities through strategic, mission-driven development. We specialize in projects that create long-term social and economic value across New York City’s five boroughs, with a focus on critical community infrastructure such as schools, healthcare centers and administrative offices for not-for-profits.

Through adaptive reuse and ground-up development, we embrace a sustainable, thoughtful, and impact-driven approach that fosters inclusion, resilience, and long-term neighborhood growth. At Manatus, we believe real estate is more than just physical structures—it is a catalyst for social change and economic empowerment.

We are actively seeking collaborations with like-minded organizations, institutional investors, and public-private partners who share our vision for equitable, community-focused development. Whether you are a nonprofit seeking expansion, a public entity with an urgent infrastructure need, or an investor looking to make a measurable impact, we welcome the opportunity to co-create transformative projects that leave a lasting legacy.

Let’s build stronger communities together—one impactful project at a time.

Meet Our Team

Justin Stern

Founder, Managing Member

Matt Greely

Associate, Acquisitions and Development

Steven Dobbs

Sr. Vice President of Construction

Alexander Sanchez, P.E.

Project Manager, Construction

Gary Spindler

Gary Spindler

Partner

Mission-Driven Development. Impact-Focused Investing