Leadership Team | WGI

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Leadership Team

We’re looking forward to working with you on your next project. Our team of professional engineers, land surveyors, land planners, landscape architects, environmental scientists, architects, and land use consultants have market-leading experience throughout the United States.



Nancy Clements

Senior Vice President, Transportation

Robert Hanson

Vice President, Geospatial

Matthew Stewart

Vice President, Texas

Jeff Brophy

Vice President, P.L.A.C.E.

Jacob Gonzalez

Vice President, Parking Solutions

Brian Rheault

Vice President, Structural Solutions

Walter Kloss

Vice President, Transportation Alternative Delivery

Joel Wantman

Board Honorarium

David Wantman

David Wantman

Chief Executive Officer

Mario Echagarrua

Executive Vice President, Chief Operating Officer

David Kent

Chief Financial Officer

Michael Davis

Senior Vice President, Chief Strategy Office

Brian LaMotte

Senior Vice President, Chief Business Development Officer

Kate Fontaine

Vice President, Administration

Cindy Sachnoff

Vice President, Human Resources

Ira Wolf

Vice President, Chief Information Officer

Will Schnier

Vice President, Chief Marketing Officer

John Abbott

Director, Environmental Services

Erik Brueningsen

Director, Utility Services

Gary Cudney

Senior Vice President, Parking Solutions

Kelly Daacon

Marketing Director

Kimberlee DeBosier

Director, Project Excellence

Lee Dowden

Vice President, Central Florida Regional Manager

Jon Forster

Manager, Parking Solutions

Douglas Gannon

Chief Engineer, Parking Solutions

Andy Garganta

Vice President, Transportation

Greg Griffith

Manager, Environmental Services

Sam Hall

Vice President, Strategic Development Manager

Daniel Hennessey

Director, Transportation Engineering

Arnie Hernandez

Director, Architecture

Michael Jaroch

Director, Drainage

Keegan Larson

South Florida Transportation Regional Manager

Lindsay Libes

Director, Planning

Robert McConnell

Vice President, Parking Solutions

Jason Mihalovits

Director, Landscape Architecture

Lisa Nisenson

Vice President, New Mobility & Connected Communities

Brett Oldford

Director, Civil Engineering

Mike Ortlieb

Vice President, Parking Solutions

Bryan Peterson

Director, Creative Services

Chris Presnell

North Florida Transportation Regional Manager

Richard Reace

Regional Director, Land Design Services

Marc Remmert

Director, MEP Engineering

Mark Sampson

Manager, Restoration

Fabio Serrato

Manager, Parking Solutions

Adam Schildmeier

Director, Private Land Development Engineering

Jeremiah Slaymaker

Regional Geospatial Manager, North Florida

Raymond Smith

Vice President, Parking Solutions

Barbara Stiles

Vice President, Business Planning

Arnaud Thibonnier

Director, Structural Engineering

Joel Wantman

Board Honorarium

Joel Wantman is board honorarium of WGI, the firm he founded after moving to South

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David Wantman

Chief Executive Officer

David Wantman, PE, is chief executive officer of WGI, the firm his father founded in 1972..

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Gregory Sauter


Gregory Sauter, PE, president of WGI, was formerly a Founder of Smart City Works..

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Mario Echagarrua

Chief Operating Officer

Mario Echagarrua, a highly regarded 37-year transportation engineering veteran..

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Eric Flicker

Outside Director

Eric Flicker brings 50 years of increasingly high-level civil engineering experience..

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Charlie Geer

Outside Director

Charlie Geer is a client executive and a senior vice president with..

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Jennifer Vail

Director, Private Planning

Russell Yeager

Director, Civil Engineering

Clayton Wolfe

Director, Structures

Lynn Zolezzi

Manager, Transportation Planning

Joel Wantman

Board Honorarium


Joel Wantman is board honorarium of WGI, the firm he founded after moving to South Florida in the late 1960s. Essentially working alone, he took on a few select land development and surveying projects, all the while gaining a reputation for doing extraordinary work on time and within budget.
Through careful and strategic growth, by the 1980s WGI had offices throughout Florida and more than 150 employees, including his son, David. With the economy and business booming, it seemed like the perfect time for Joel to retire. Yet, in early 1990s, he decided to return to work, re-establishing connections with past friends, clients, and business partners, and once again started from the ground floor to build a business that delivers exemplary infrastructure.
Joel recruited David back to the business with a goal to build the new WGI, and to solidify its position once again as a leader in the design consultant arena. They were awarded the first public infrastructure project they competed for. Then the second. Soon, the floodgates opened and there was no looking back.
Today, as board honorariumn, Joel Wantman’s leads corporate initiatives related to company growth and stability. He also stays actively involved on a project-level basis by ensuring clients’ needs are being met. His experience over the years includes roadways, municipal projects such as recreational facilities and water and sewer systems, and major residential and commercial projects for private developers.

David Wantman head shot

David Wantman

Chief Executive Officer

David Wantman, PE, is president of WGI, the firm his father founded in 1972. He easily stepped into the role, having a lifetime of understanding the intricacies of running a multi-discipline engineering and consulting firm built on a strong set of values that call for spearheading the balance between exceeding the expectations of clients while cultivating the talents of WGI’s associates.
At 13, David was copying blueprints for WGI, and just a year later joined one of its survey crews. He went on to earn his Bachelor of Engineering degree at University of Florida – still a proud Gator to this day with a strong dedication to the school and, in particular, his support of its Engineering program.
Knowing he needed to gain knowledge in an environment outside the family business, he answered a classified ad and went to work for a decade at a large national engineering firm in Tampa. He returned to WGI in 1999 tempered by a wide variety of experiences, and took the helm of WGI in 2009, ready to aggressively lead the firm into the future, with a blueprint for success that includes both organic growth and strategic acquisitions. David Wantman is at the center of delivering every quality project on budget and on time, if not before. These are values he is passionate about and strives to instill in every one of the firm’s 300+ associates.
David has been providing design and management services throughout Florida in the transportation industry for nearly three decades. He has delivered a variety of projects including expansions, widenings, and interchanges. His vast experience includes design, value engineering, PD&E studies, and construction management.

Gregory Sauter



Gregory Sauter, PE, president of WGI, was formerly a Founder of Smart City Works, the world’s first infrastructure actuator accelerating infrastructure innovation and commercialization that bring to life promising business ideas and companies to catalyze and rethink civil infrastructure innovation and help meet the needs of 21st century communities and their growing populations. President and chief executive of Crossroads Advisory, servicing infrastructure and technology companies, where he and his team are committed to business success by advancing leadership and outcomes through executive and organizational transformation, a focus on culture, innovation, ethics, integrity, and authentic leadership.
Greg has 30 years in the engineering and construction industry and is a professional engineer with a Bachelor of Science degree in Mechanical Engineering from the University of Massachusetts, a Master’s degree in Civil/Environmental Engineering from the University of Alabama, and a Master of Business Administration degree from Rutgers University.
Prior to founding Smart City Works, he enjoyed a 15-year career with engineering and construction giant AECOM as their executive vice president and chief corporate officer. Greg was instrumental in AECOM’s growth to be the 100,000 person, $19.5B company it is today. Greg’s commitment to excellence has garnered national and international awards, including Ethisphere’s 100 most ethical companies list, the Gold American Business Awards, multiple international business awards, and Newsweek’s Top 500 Greenest Companies.
Greg is an adjunct professor at Columbia University in the Global Leaders in Construction Management, Department of Civil Engineering and Engineering Mechanics; teaching graduate students innovation and entrepreneurship in civil engineering. Greg is a past president and board chairman of Engineers Without Borders-USA, a global humanitarian non-profit organization of 17,000 members currently delivering over 600 global development projects in 40 countries, while providing transformational life experiences to students and professionals. Greg is a board director of OmniEarth, Inc. which uses advanced geo-analytics to quantify the changing world and provide business actionable information to industries globally.
Greg currently shares his executive insights and leadership with several non-profits with a focus on the next generation of leaders and professionals including: Network for Teaching Entrepreneurship, New York Board Member/Derek Jeter Turn-2 Foundation, Resource Board Member/New Jersey Institute of Technology, Board of Overseers/Rutgers University Institute for Ethical Leadership.
Greg has held leadership roles in some of the world’s most challenging and exciting infrastructure projects on six of the seven continents. With a career that includes transportation, energy, environment, infrastructure, technology, and legacy defense challenges, he has helped achieve excellence on some of the most complex infrastructure challenges of our times.

Mario Echagarrua

Executive Vice President, Chief Operating Officer


Mario Echagarrua, a highly regarded 37-year transportation engineering veteran, joined WGI in 2015 as the firm's executive vice president, chief operating officer. Mario has extensive experience in the overall management and administration of engineering operations, as well as a strong background in surface transportation engineering. His unique experience covers transportation projects from PD&E, conceptual studies, RFP development, final design, and CE&I. His projects include interstate corridors, complex interchange highway design, HOV/managed lanes, and signature bridge replacement projects.

As WGI’s COO, Mario works with its senior management team, accounting and human resources, and IT professionals to improve operational efficiency and accountability across WGI’s 15 divisions and 18 offices.

Mario earned his Bachelor of Science from the University of Miami, then began his career in 1978 as an engineer working for the Florida Department of Transportation District Four, Design Section in Ft. Lauderdale, Florida. Since entering the private sector in the 1980s as a design engineer, Mr. Echagarrua moved up the ranks to manage projects statewide as the president and owner of EC Driver, a multi-disciplined firm nationally recognized for its movable bridge design expertise. Following a sale to URS Corporation in the mid-1990s, Mario continued as president of EC Driver, operating as a wholly owned subsidiary of URS. In 2013, he assumed the role of vice president and office manager of URS’s Boca Raton office, providing general civil engineering, transportation, and environmental services.

Eric Flicker

Outside Director


Eric Flicker brings 50 years of increasingly high-level civil engineering experience, with specific on-the-ground skills in civil/sanitary, municipal, and environmental engineering, as well as land surveying, for government, industry, commercial, and land development.
Though the course of a career that began in 1977 after earning both his Bachelor of Science in Civil Engineering and then his MBA from Pennsylvania’s Lehigh University, Eric’s roster of professional affiliations is impressive. He is past president, past national chair, and/or past director of the American Council of Engineering Companies (ACEC); Pennsylvania Society of Professional Engineers; HWAC/National Association of Engineering/Science Firms Practicing in Hazardous Waste Management; Engineers Club of Philadelphia; Philadelphia Engineering Foundation; American Society of Civil Engineers (ASCE, Philadelphia section); American Council of Engineering Companies; Habitat for Humanity, Delaware Valley; and Philadelphia Education Fund.
Eric was honored by the American Council of Engineering Companies, Pennsylvania, with the Distinguished Order of Merit; the American Society of Civil Engineers (ASCE Philadelphia section) Civil Engineer of the Year; Delaware Valley Engineer of the Year; and Engineering New Record’s Marksman.
His lengthy list of representative experience includes the areas of sewage collection and treatment; municipal roads, bridges, and parking; landfills; environmental engineering; site and civil engineering; and project financing and funding support, running the gamut from project design to project management, from serving as a principal engineer to a position as CFO, and now Senior Consultant, of Pennoni Associates Inc., Eric is a true engineering, "Jack of all trades." While his involvement in the day-to-day practice of engineering provided him years of satisfaction, it is his continued work promoting the profession that is his proudest accomplishment.

Charlie Geer

Outside Director


Charlie Geer is a client executive and a senior vice president with Greyling Risk Consulting and Insurance Brokerage. Charlie has 40 years of experience working for engineering and construction firms in various roles related to managing risk, and is a frequent speaker and author on a variety of engineering and risk management topics.
Prior to joining Greyling, Charlie was a senior vice president/principal owner of Kimley-Horn and Associates, Inc. Among his many roles at Kimley-Horn, Charlie served as quality, liability, and risk manager. Before becoming risk manager, Charlie served as the civil engineering division manager for Kimley-Horn. Prior to joining Kimley-Horn, Charlie was a project manager for major design-build, engineering, and construction companies completing major projects nationwide and internationally.
Charlie is a Fellow of the Florida Engineering Society, a Fellow in the American Council of Engineering Companies (ACEC), past state president of ACEC-Florida (FICE), past chair of both the ACEC National Transportation Committee and Risk Management Committee. He is a member of the Board of Directors of the Florida Engineering Society. He also serves on the Dean’s Advisory Board and the Civil Engineering Advisory Board for the University of Florida College of Engineering.
Charlie received a Bachelor of Science in Civil Engineering from the University of Florida in 1976 and an MBA from the University of Houston in 1980. He is a registered professional engineer in Florida, Georgia, and Texas.