About ReCon


ReCon Retaining Wall Systems was formed in 2000 by a group of six Twin Cities individuals that had a vision of capturing “returned concrete” (thus the name “ReCon”) from ready mix trucks to make a large retaining wall block. Five of the founders had a “construction” background, including expertise in the concrete finishing business and in the hardscape construction business.

It did not take long for the marketplace to provide to ReCon two very important messages. First, the marketplace embraced the concept of a large retaining wall block that could be machine set, that could be utilized to build tall gravity walls, and that had a natural stone texture. Second, the use of returned concrete created a perception of lower or inconsistent quality concrete. Thus, in early 2002 ReCon made a course correction and began working directly with precast concrete companies to manufacture ReCon with a high quality mix design.

With the help of ReCon’s licensed producers, ReCon has built an international “big block” retaining wall company. We currently have 50 producers in eight countries. More than 3.5 million sq. ft. of ReCon retaining walls have been built around the world.


Our Staff


Big Block Retaining Walls - President Stan Hamilton

Stan Hamilton, CEO – 17 years with ReCon and a background as an accountant that brings a financial discipline to ReCon and to the business model that we provide to our licensees, a model that is profitable!


Al Pfannenstein

Al Pfannenstein, President & Chief Operating Officer – joined the ReCon team in 2018 with 32 years of experience in the retaining wall industry. Al began his career with a national retaining wall licensing organization and then more recently with a national block producer. Al has trained wall contractors; led sales, marketing and R&D programs; and served on multiple NCMA retaining wall committees.


Big Block Retaining Walls - Sales Director, Erik Nelson

Erik Nelson, AIA, RIBA, Director of Licensee Services – 11 years with ReCon and 23 years in the retaining wall industry. Erik is an architect and brings that unique perspective to ReCon and its product development activities. Erik is a member of the American Institute of Architects and the Royal Institute of British Architects.



Michael Klotthor, PE, Director of Engineering  – 2 years with ReCon, Mike is a professional structural engineer with over 8 years of experience designing and assessing buildings, structures and retaining walls. Prior to joining ReCon, Mike worked for a structural engineering consulting firm as well as with CSG, a firm that specializes in the design of retaining walls and earth retention systems.


Big Block Retaining Wall Office Administrator, Kristen Ruder

Kristen Ruder, Office Manager – 12 years with ReCon, Kristen keeps our office running smoothly for the benefit of the ReCon staff and the ReCon licensees. Kristen also administers our software registrations.


Bill Henzler, Licensee Support Manager – 4 years with ReCon and has 6 years in the retaining wall industry. Bill has hands on experience installing ReCon blocks which gives him an added advantage in helping our Licensees work through unique wall installations.