Salas O’Brien welcomes Rock Brook

Salas O’Brien is expanding integrated design services by welcoming Rock Brook, an award-winning firm recognized for its client-driven approach to complex projects. With more than two decades of experience serving healthcare, higher education, life sciences, manufacturing/industrial, and corporate clients, the team strengthens Salas O’Brien’s ability to support mission-critical facilities with highly responsive, integrated design services.

Rock Brook is recognized for delivering principal-level involvement on every project and providing integrated solutions across mechanical, electrical, fire protection, security, and sustainable design. The firm has built a strong reputation for quality, responsiveness, and long-standing client relationships on high-profile projects throughout New Jersey, New York, and Pennsylvania.

Rock Brook’s depth of technical expertise, combined with their award-winning portfolio and strong market presence, makes them an outstanding addition to Salas O’Brien. Our shared commitment to innovation, collaboration, and client success enhances how we solve complex challenges and create measurable value.

Darin AndersonSalas O’Brien Chairman & CEO

Rock Brook will continue to operate in the same offices with the same leadership and project delivery team, leveraging Salas O’Brien’s resources and technical expertise to expand reach and provide more value for clients.

This merger with Salas O’Brien represents an exciting evolution for our team. Our award-winning experience in critical markets like healthcare and life sciences underscores the value we bring. Joining with Salas O’Brien allows us to preserve what has earned trust for generations while gaining new strength to drive innovation and opportunity for our clients and team.

Gregory J. DeMarcoRock Brook CEO

Morrissey Goodale, a specialized management consulting and research firm exclusively serving the architecture, engineering, and environmental consulting industries, initiated the transaction and advised Rock Brook.

Learn more about Salas O’Brien’s approach to mergers.

Projects

Sustainable design reduces operating costs for Barclays

Salas O’Brien partnered with Barclays to strategically transform its Whippany “Campus of the Future”, renovating multiple office buildings and designing two new parking garages. While the project is nearing completion, the biggest challenge was performing construction while employees were still on-site and occupying the buildings. Our team proactively addressed these complexities by engineering customized solutions that upgraded HVAC and electrical systems to support increased occupancy.
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Interior view of Natirar Resort showcasing the restaurant area

Adaptive reuse strategy minimizes new construction needs

Salas O’Brien has been providing integrated engineering design services for Pendry Natirar’s historic project for nearly two decades. This multi-phased project required our team to modernize historic structures into high-end, tech-enabled spaces while minimizing new construction, preserving the landscape, and controlling long‑term operating costs. Our team carefully adapted existing buildings with high-efficiency mechanical and electrical systems, advanced controls, and resilient infrastructure, reducing energy use by up to 75%.
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Exterior of Celularity New Pharmaceutical Manufacturing Plant

Sustainable retrofit creates worldclass manufacturing space

Salas O’Brien partnered with Celularity, a biotechnology leader in cellular-based therapies, to deliver integrated design solutions, including mechanical, electrical, plumbing, fire protection, IT, audiovisual, and security systems. Our work enabled Celularity to transform a 150,000-square-foot Class A office building into an FDA-validated, world class pharmaceutical manufacturing facility. By optimizing infrastructure, preserving green space, and minimizing construction waste, we saved Celularity significant time and cost.
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Topics

Mergers