Our vision is to use the highest standards of professional engineering to satisfy the needs of property owners, general contractors, industrial clients, and transportation agencies. All our engineering projects include global stability calculations, something that is seldom done in the U.S., and we strictly conform to all appropriate codes and standards in our industry. Our vision encompasses being a friendly, easy company to do business with, with our customer’s satisfaction always directing us.


Our mission is simple: we strive to be the #1 consulting engineering company in North America that specializes in earth retention projects such as retaining walls, reinforced steep slopes, and similar applications. Additionally, the second division of Earth Retention offers the products used in these projects, such as geogrids, geotextiles, and wire facing systems, at competitive prices – all Made in America.  Our products are all fully tested in U.S. laboratories and have the highest material properties available.



The Culture of Excellence

  • Offer our clients common-sense designs, always looking for value-engineering opportunities while adhering to all standard factors-of-safety.

Mutually Beneficial Partnerships

  • Treat our clients as if they are our partners and team members.
  • Consider our employees as part of our corporate family.
  • Develop strong, long-term relationships with our suppliers.

Positive and Rewarding Work Environment

  • Share all information with our employees related to company performance, long and short-term goals, our strategic business plan, and give them full opportunity to share their ideas, problems, and personal goals with senior management.
  • Implement on a regular basis a recognition program for employees who attain excellence in measurable categories.
  • Practice a culture of employee diversity, safe working conditions, anti-discrimination and zero tolerance (immediate termination) for sexual harassment or abuse.

 Continuous Quality Improvement

  • Offer each of our employees the opportunity to receive more education related to their job function.
  • Identify opportunities for improvement in design turnaround time, workflow procedures, handling project changes and design revisions, product shipping logistics, and other functions throughout our company.

Always question: “How can we be better?”



  Chad is the founder of Earth Retention Systems (ERS) and Clark Geotechnical. He has 22 years of experience in the design and construction of earth retention structures and geotechnical engineering. Chad is currently licensed in 25 states and has extensive experience throughout the U.S. He has supervised the design and construction of over 10 million square feet of earth retention systems consisting of segmental block, reinforced slope, MSE precast concrete panel, cast in place concrete, soldier pile, tie-back, soil nail, and sheet pile walls. Prior to forming ERS & Clark Geotechnical, Chad held several prominent positions at geotechnical engineering firms, geosynthetic manufacturing companies and design build retaining wall construction firms. Chad is a 1994 graduate of Georgia Institute of Technology with a Bachelor’s in Civil Engineering.

Chad Clark, P.E. – Founder​​

Lance has a B.S. in Civil Engineering from Virginia Polytechnic Institute and State University (Virginia Tech), and is a registered Professional Engineer. He has more than 25 years of experience in the design, specification, and application of earth retention structures, with emphasis on segmental retaining wall and geosynthetic reinforced soil technology. Lance is an active member within ASTM International and the National Concrete Masonry Association (NCMA) focusing on the development of standards and design methodologies beneficial to the advancement of geosynthetic materials and earth retention structures. Lance is former NCMA SRW Technical Subcommittee Chair, and current NCMA Limit Equilibrium Design Method Task Group Chair.

Lance Carter, P.E. – Chief Engineer

Matt has over 20 years of experience in the design and construction of earth retention structures and sound barrier wall systems in the heavy highway, commercial, government, and private sectors. His knowledge has an emphasis on sound barrier walls used primarily for state DOT applications, and earth retention systems consisting of MSE precast panel with steel soil reinforcement, segmental block with geogrid reinforcement, and soldier pile and lagging. Prior to joining ERS, Matt worked for a design-build contractor specializing in the design and construction of rammed aggregate piers, rigid inclusions, helical anchors, steel piles, and drilled shaft foundation systems used for settlement control and slope stability. Matt is a graduate of Virginia Polytechnic Institute and State University (Virginia Tech) with a B.S. in Civil and Environmental Engineering and is a licensed professional engineer in 9 states across the Mid-Atlantic and Northeast.

Matt Thompson, P.E. – Mid-Atlantic Director of Engineering

Kyle graduated from the University of Minnesota Duluth in 2013 with a Bachelor of Science in Civil Engineering, and is a registered Professional Engineer. Before joining ERS, he worked at Allan Block for six years as a Design Engineer. Kyle has a wealth of knowledge in the design and application of earth retention systems and specializes in segmental retaining walls. He is highly skilled in AutoCAD, ReSSA+, and industry leading technology. Kyle is an active member of the American Society for Testing and Materials (ASTM), has language proficiency in Spanish and Arabic, and is the owner of GeoWall Designs. Kyle is a decorated Army veteran having served six years as an Infantryman. Kyle is a licensed professional engineer in eleven states to include Colorado, Iowa, Kentucky, Michigan, Minnesota, Nebraska, South Dakota, Tennessee, Wisconsin, and Wyoming.

Kyle Huerd, P.E. – ERS-MidWest – GeoWall Designs President

Chip Fuller has been involved in the civil engineering products industry for 42 years, in a wide variety of positions and experiences. He has a degree in Ocean Engineering and MBA from Florida Atlantic University and completed an executive education program at Stanford University. He also claims to have a PhD in the School of Hard Knocks, having done significant business in over 30 countries on 6 continents. Chip was co-founder and President of Strata Systems, Inc., a manufacturer of geogrids used for soil reinforcement,. He has founded several companies since 1979 including Geodynamics, Inc., Waterway Technologies Co., Strata Systems, Inc., and Abaco Technologies. He has also been employed by Naue GmbH, Nicolon/TenCate, Conwed Plastics and Tensar. Additionally, he has been a key participant in seven mergers/acquisitions since 1984. After retiring for three years, he joined Earth Retention as a partner in 2020, and is based in Asheville, NC.

Chip Fuller – Business Development Director

Jim is a 1993 graduate of Florida State University with a BS degree in Psychology. He has a 26-year history in the civil engineering products industry as a sales manager for companies including Cast Crete Corp. in Tampa, RMC Allied Materials, CEMEX, Block USA, and now Earth Retention for the past four years. Jim enjoys spending time outdoors with his kids, hunting, salt-water fishing, and anywhere on a beach.

Jim Kelley – Regional Sales Manager

Erik is a 1994 graduate of Potsdam College in upstate NY and has a degree in geology. He is a seasoned sales manager with 22+ years in the hardscapes/retaining wall industry. Prior to coming to Earth Retention, he worked for Oldcastle APG and EP Henry, expanding both new commercial segmental retaining wall markets and developing top-producing sales teams. Erik resides in Bethesda, MD with his three children, wife of 17 years & their golden doodle.

Erik Pedersen – Mid-Atlantic Sales Representative

Jeremy had an extensive career in architecture before switching fields and joining Earth Retention when the company was formed. He joined the company as an engineer, and now has ten years of experience in designing earth retention structures. During the ten years, he played a major role in hiring, training, and managing most of the engineers with us today. He is now the Design Operations Manager. He enjoys rock climbing, mountain biking and scuba diving, plus being outdoors with his wife and three young daughters.

Jeremy Davidson – Design Operations Manager

Yulin joined Earth Retention in 2016 after graduating from Georgia Tech with an M.S. degree in Civil Engineering. She gained experience and knowledge in designing earth retention systems as developing her career at Earth Retention. She is working remotely in Seattle Metropolitan area. Yulin is a registered professional engineer in Washington State and is pursuing a PE license in California.

Yulin Luan, P.E. – Senior Engineer

Nick Thiel
Nick is a Licensed Professional Engineer in the Commonwealth of Virginia, and has been with Earth Retention since 2017. He graduated from James Madison University with a major in Engineering and a minor in Mathematics, and has prior experience in site civil engineering, environmental engineering, and construction. He was raised and currently resides in the Northern Shenandoah Valley of Virginia, and enjoys spending time outdoors and with his family in his free time.

Nick Thiel, P.E. – Project Engineer

Erika, E.I.T. is an engineering star performer at Earth Retention. She is a graduate of Ohio State University with a B.S. in Civil & Environmental Engineering, and minors in Construction Engineering and Mathematics. In college she was very active in the Alpha Omega Epsilon sorority. Erika is currently a Volunteer Archivist for National Archives and Records Administration. She resides in the metro area of Atlanta, Georgia with her husband and English bulldog.

Ericka Williams, E.I.T. – Project Engineer

Thao Truong is a staff engineer specializing in the design of geogrid-reinforced retaining walls and over-steeped slopes. She received her engineering degree from Georgia Institute of Technology in 2019. Having passed her FE exam in 2020, she is now an E.I.T. Engineer, on her path to achieving PE status in a few years. Thao is from Vietnam and has been on the Earth Retention team since 2019. In her spare time, she enjoys hiking, chess and traveling.

Thao Truong, E.I.T. – Project Engineer

Omkar graduated from University of Texas at Arlington in 2019 with Masters in Construction Engineering and Management. His educational background includes civil engineering, design of earth structures, concrete design and project management. Omkar has also achieved full certification in Oracle’s Primavera P6 enterprise project management software. As an Engineer in Training (EIT) aiming to achieve his P.E. License, he has 2 years of experience at ERS and is now applying his university education in solving real world engineering problems.

Omkar Shirke, E.I.T. – Project Engineer

Robert graduated from Ashworth University’s Computer Aided Design Technician Program. He has been a senior CAD operator at Earth Retention for 3.5 years and supports the engineering team. In his spare time he enjoys hiking, traveling and cooking (he was a former chef for 10 years).

Robert Cupp – CAD Operator

Alpana is an expert at manipulating construction project search platforms for the generation of sales leads for Earth Retention’s sales team and our clients. She is based in her Indian office and communicates with our management team in the U.S. daily. She has a MBA in Marketing from Indian Institute for Technology & Management (ITM) and Bachelor of Technology in Electronics and Telecommunication from Jagannath Institute for Technology & Management (CUTM) India. Her previous professional background includes significant positions at Bennett Coleman and Co. Ltd. (Times Group), Reliance Securities and Fugro Survey India Ltd. Alpana has two children, a husband who is a Naval Submarine Officer, and lives on the coast of northeast India.

Alpana Gantayet – Market Research Analyst