Innovative solutions. Immediate response. In-house expertise.

Simmons & White, Inc. provides comprehensive professional engineering services to the public and private sectors throughout South Florida.

About Us

We have been the leader in due diligence & entitlement services, civil engineering & land development consulting, and traffic engineering & transportation planning services throughout South Florida since 1982.

Established and headquartered in Palm Beach County, Simmons & White delivers cost-effective, sustainable engineering solutions and uncompromised service to a wide range of clients in both the public and private sectors.

About Us Principal Pic_Filtered_7931_113023 (1) (1)

Our Portfolio

Our vast project history provides a core foundation for analytical forward thinking and effective problem solving, making us the trusted source for comprehensive engineering services for over 40 years.


Multifamily Residential

aerial view of nice south florida suburban housing community

Single Family Residential

Project 2


mixed use thumb

Life Planned Communities

Project 3

Healthcare/Medical Office

Project 1

Educational Facilities


Equestrian Facilities

commercial thumb

Industrial/Regional Distribution Centers

gov thumb

Municipal/ Governmental Services

signal thumb

Signalization &

golf thumb

Golf Course/Country Club


FEMA Flood Plain Management

What We Do

Our professional engineers and project managers work directly with developers, architects, land planners, contractors, and state and local government agencies, giving our team a unique, well-rounded perspective for critical thinking and problem-solving while staying on schedule and within budget.

Our Services

Civil Engineering & Land Development
Traffic Engineering & Transportation Planning
Due Diligence & Entitlement Services
Project Types
  • Multifamily Residential
  • Single Family Residential
  • Office/Retail
  • Life Planned Communities
  • Healthcare/Medical Office
  • Educational Facilities
  • Equestrian Facilities
  • Industrial/Regional Distribution Centers
  • Municipal/Governmental Services
  • Signalization & Intersection Design
  • Golf Course/Country Club
  • FEMA Flood Plain Management

Why Choose Us

Our team thoroughly evaluates the needs of our clients and caters an individual plan to ensure a successful outcome. We can anticipate and easily adapt to any changes throughout the life of a project, remaining accessible, responsive, and consistent in communications.

Each project is unique, with its own set of opportunities to introduce an improved sustainable solution. Our entire team of professional engineers stays apprised of the latest code and regulatory changes to fully understand the parameters in which we can proactively problem solve.

We never lose sight of our client’s goals, timeline, and budget. Through our pursuit of cutting-edge engineering solutions, we maintain financial discipline at every stage of the project, creating the utmost value for both the client and the project stakeholders.

The combined expertise of our skilled project managers, engineers, and designers, matched with experienced development teams creates an environment to deliver a successful project every time.


Years In Business


Combined Years of Professional Engineer Experience


Number of Projects
Gregory F. Bolen, P.E.


gregory headshot
Robert F. Rennebaum, P.E.


robert headshot
Phillip W. Rowe Jr., P.E.

Vice President

phillip headshot
J. Kyle Duncan

Vice President

j kyle headshot

What Our Clients Say About Us

 “GL Homes values our decades long relationship with Simmons and White, Inc. Their local knowledge and expertise in civil and traffic engineering has been an integral part of our business model over the years and has been a major contributing factor in our achievements in Palm Beach County and surrounding jurisdictions.”

Kevin Ratterree
Vice President, GL Homes

“The County has found Simmons & White, Inc. to be a well-qualified, well-managed, and thoroughly professional firm. They have performed their services with integrity, a cooperative spirit, and a positive attitude.”

Motasem Al-Turk, Ph.D., P.E.
Director, Palm Beach County Traffic Division

“We have worked directly with Simmons & White, Inc. for over 25 years on a variety of civil and traffic engineering projects. I trust their expertise and attention to detail, knowing they’ll take a modern approach to problem solving, while maintaining communication every step of the way.”

Frank Navarro
Managing Principal, Navarro Lowrey, Inc.

“We value the expertise the Simmons & White, Inc. team offers, and count on them to do a superior job.”

Ray Liggins, P.E.
Village Manager and Former Village Engineer, Village of Royal Palm Beach

“Simmons & White, Inc.’s staff is consistently competent and cooperative. Their work is performed on schedule with great attention to detail. They display a professional attitude and provide a timely response to each request, and have been particularly valuable in their ability to work with staff, residents, and elected officials, as well as with other governmental agencies.”

Chuck Huff
Village Manager, Village of North Palm Beach

“We are continuously pleased with their approach to cost efficiency and innovative design, as well as their thorough knowledge of the regulatory process and permitting requirements.”

Herb Kahlert, P.E.
Former Palm Beach County Engineer, President, Karl Corporation

“Simmons & White, Inc. has a strong understanding of the City’s design criteria and procedures. I can fully recommend their firm with regard to their abilities and knowledge of traffic engineering, civil engineering and land development services.”

Todd Engle, P.E.
City Engineer, City of Palm Beach Gardens

“I have enjoyed working with the Simmons & White team. They have proven to be dynamic team players, dedicated to providing the best possible outcomes for their clients.”

Nader Salour
Managing Partner, Cypress Realty of Fla, LLC

“I’ve had the privilege of working with the partners of Simmons & White, Inc. for nearly 20 years on projects throughout Palm Beach County. We can always count on Simmons & White to perform at the highest level with professionalism. KAST looks forward to continuing our mutually beneficial relationship for years to come.”

David DeMay
Principal/Senior Vice President, KAST Construction

“Experience from both the public and private sectors brings an ideal perspective and ability to adapt to the client’s needs.”

Ruben Cruz
Senior Planner, Town of Jupiter Island

“During the past four years, while I have been Mayor of Palm Beach Shores, Simmons & White, Inc. has provided our Town Engineering services. Our Primary contact point has been SW partner, Rob Rennebaum. He and his firm have been extraordinarily responsive and very professional in their service to our Town. The Town staff and I have a great deal of confidence in Mr. Rennebaum and highly recommend him and Simmons & White, Inc. Engineering Firm.”

Alan D. Fiers
Mayor, Town of Palm Beach Shores