About Us

Innovative solutions. Immediate response. In-house expertise.

Simmons & White, Inc. has been the leader in due diligence & entitlement services, civil engineering & land development consulting, and traffic engineering & transportation planning services throughout Florida and the southeastern United States since 1982.

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Focus and History

With complete client focus, unparalleled professionalism, and a commitment to delivering quality projects on time and on budget, we have cultivated strong working relationships within the design, construction, and infrastructure industries.

Our vast project history in both the public and private sectors 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.

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.

Due Diligence & Entitlement Services

Moving projects efficiently from concept to construction.

We have guided clients through the project development process for over four decades, initiating our efforts well before the groundbreaking. Upon site selection, we obtain historical property documents, analyze existing conditions and characteristics, complete a risk assessment, and clearly define the development criteria for a successful project.

Our comprehensive due diligence and entitlement reports may include, but are not limited to:

General Site Data

Size, existing structures, soil conditions, civil drawings, topographical surveys, surrounding streets and developments, topographical layouts for potential building locations, ingress/egress, easements, setbacks, Right-of-Way requirements, deed restrictions and restrictive covenants.


Existing services available such as water, sewer, drainage, stormwater systems, electric, phone, cable, and natural gas.

Development Requirements

Applicable codes for general building and fire regulations, zoning and permitting approval processes including timeframes and costs for submissions, drainage and grading considerations, parking calculations to ensure proper spaces are provided, and permitted signage and landscaping.

Engineer’s Estimates

Time requirements to complete the site plan, architectural and engineering review, and the design and production of construction documents.

Partnering with the development team, we bring our unique local insight, industry network, skilled perspective, and inherent knowledge of the latest procedures to expedite the regulatory approval process. In addition, our established relationships with municipal, county and state governing agencies allow us to quickly and effectively problem solve as challenges arise throughout the life of a project.

Civil Engineering & Land Development

Protecting the project return on investment from concept to ribbon cutting.

Our firm’s history is directly connected to the growth and development of the sunshine state, and we recognize the demand for construction and infrastructure improvements is at an all-time high. Our combined experience and valuable industry partnerships allow us to fast track commercial and residential construction projects and quickly accommodate any requests.

As the trusted source for civil engineering and land development services, we have established long lasting working relationships with clients, governmental agencies, and project partners, while expanding our team and portfolio each year.

For each project, whether public, private, large, or small, we tailor a specific approach from start to finish to best suit our client’s individual needs.

Design Services

Utility system and roadway designs, site development, master planning, shop drawing review, civil construction plan preparation including conceptual paving, drainage, water, and sewer plans for submittal to governmental agencies, permitting process schedule and preliminary estimate of fees and approval timeframes to avoid delays, and preliminary cost estimates of site development including earthwork, grading, paving, drainage, water and sewer.

Construction Coordination

Contract administration, value engineering, comprehensive plan review and revisions, coordination of platting and surveying, site observations, project certifications, managing permit approvals including water, sewer, drainage, and on- and off-site paving, and scheduling/attending team meetings with governmental agencies and public officials.

Our dynamic engineering team is ready to bring your next concept to reality utilizing our effective and efficient project coordination experience, derived from thousands of successful projects.

Traffic Engineering & Transportation Planning

Minimizing impacts while maximizing the safety and mobility of all modes of transit.

Through our comprehensive studies, creative approach, and modern designs, our transportation management solutions allow rapidly expanding communities to meet the demands of development. From identifying and addressing challenges on existing roadways to designing traffic layouts for new developments, our proven methodologies create cost effective options for any project.

While a common goal is to reduce travel time and congestion, we know it’s even more important to arrive safely at your destination. Encompassing all users from motorist to pedestrian, our corridor and feasibility studies provide a 360-degree view of current conditions and future demands. This includes key factors such as intersection efficiency, Right-of-Way conditions, property access and egress, and traffic volumes at peak and off-peak timeframes.


Intersection improvements and street cross-sections for optimal mobility and safety, signalization to optimize timing and improve traffic flow, garage layouts to increase capacity, signing, pavement marking, delineation, lighting, utilities, and streetscape enhancement programs.


Impacts from new developments, operational and capacity analysis for increasing traffic volumes and modified traffic and pedestrian patterns, traffic management, and the developments of regional impact (DRI) that reduce the infrastructure improvement.

Whether working directly with transportation agencies and stakeholders or partnering with our civil engineering division, we’ll identify areas for improvement, design the solutions, and support the construction team to make a positive impact and safer environment for our communities.

Our Mission

With complete client focus, unparalleled professionalism, and a commitment to delivering quality projects on time and on budget, we have cultivated strong working relationships within the design, construction, and infrastructure industries.

Our vast project history in both the public and private sectors 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.


Years In Business


Combined Years of Professional Engineer Experience


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


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Robert F. Rennebaum, P.E.


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Phillip W. Rowe Jr., P.E.

Vice President

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J. Kyle Duncan

Vice President

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What Our Clients Say About Us


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

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

“I would recommend Simmons & White, Inc. and encourage you to give them the utmost consideration when seeking quality traffic and civil engineering services.”

Ray Liggins, P.E.
Village Manager | The Village of Royal Palm Beach
Juno Beach

“I've worked with Mr. Rennebaum and his staff for the past 13 years and they have always been very professional. They complete the assigned tasks on time and on budget.”

Joseph F. Lo Bello, CPA
Town Manager | Town of Juno Beach

“I can provide a positive reference for every aspect of their partnership and involvement with the Town of Loxahatchee Groves.”

James S. Titcomb
Town Manager | Town of Loxahatchee Groves
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“Rovert F. Rennebaum and his firm were instrumental in assisting the Town analyze several serious street drainage/flooding issues and mapping out a very successful solution, which now is in place and working exactly as planned.”

Alan D. Fiers
Mayor | Town of Palm Beach Shores
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“I was very pleased with their performance, level of professionalism and technical knowledge. I was very appreciative of Mr. Rennebaum's understanding and experience with some of the non-technical aspects of our project and the advice he provided me.”

Daniel P. Clark, P.E.
Town Administrator | Town of Lake Clarke Shores
North Palm Beach

“Simmons & White's staff is consistently competent and cooperative. Their work is performed on schedule with grat attention to detail. They display a professional attitude and provide a timely response to each request by the Village.”

Chuck Huff
Village Manager | Village of North Palm Beach
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“They are responsive, knowledgeable and dedicated to developing long term relationships and satisfied clients.”

Edward M. Eissey, PhD
President Emeritus | Palm Beach State College
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“I have personally coordinated with Simmons & White for close to 15 years on water and sewer system designs and have found them to be consistently professional, very responsive, and committed to technically sound design.”

Manuel J. Conzalez
Project Coordinator | City of West Palm Beach
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“In our working experiences with Simmons & White we have found their employees to be professional, responsible, corporative, reliable and ethical.”

Todd Engle
City Engineer | City of Palm Beach Gardens