News - September 2025
- Lionel Lemay
- Aug 28, 2025
- 2 min read
Updated: Dec 30, 2025
Welcome to ConcreteNexus News
Greetings everyone and welcome to the inaugural issue of ConcreteNexus News. My name is Lionel Lemay, founder and CEO of ConcreteNexus LLC, a consulting firm specializing in educational and certification programs for the concrete industry and design professionals, with a focus on green building and sustainability. ConcreteNexus also represents building product companies in building codes and standards.
Many of you know me from my 20 years at National Ready Mixed Concrete Association (NRMCA) and 10 years at the American Cement Association (ACA). My expertise spans engineering, education, certifications, business development, and research, all centered on advancing sustainability. I hope to be able to work with you on your journey to sustainable manufacturing and construction.
Read on to learn what's new at ConcreteNexus.
Best Regards,
Lionel Lemay, PE, SE, LEED AP
847-922-7995
ConcreteNexus to Coordinate CSC Roll-out in North America
The Concrete Sustainability Council (CSC) has chosen ConcreteNexus LLC to coordinate the roll-out of its certification program in North America. This partnership will broaden CSC’s sustainability certification for concrete, cement, and aggregates across the U.S. and Canada—a region where the program is just emerging.
“This is a big step forward for the global responsible sourcing certification program, which has a stronghold in Europe and other parts of the world, but is just taking hold in the U.S. and Canada,” says Christian Artelt, Senior Manager Sustainable Construction & Public Affairs at Heidelberg Materials and Chairman of CSC.
Lionel Lemay, CEO of ConcreteNexus, brings extensive green building expertise and was involved in CSC's initial development while he was at the National Ready Mixed Concrete Association (NRMCA). NRMCA is the CSC Regional System Operator for North America. The CSC certification is recognized by major rating systems like LEED and Envision and offers concrete companies a way to showcase sustainable practices.
“I’m excited to be an integral part of the growth of the CSC certification here in the United States and Canada,” says Lemay. “The CSC responsible sourcing certification is a great opportunity for concrete and cement companies to demonstrate their excellence in sustainable manufacturing.”
The expansion of CSC certification in North America reinforces the Council’s mission to promote responsible sourcing, social accountability, and environmental performance throughout the concrete value chain.
For more information about ConcreteNexus visit www.concretenexus.com.
About the CSC
Founded in 2016, the CSC is the global responsible sourcing certification system for the concrete sector, covering the entire value chain (including the supply chain with cement and aggregates, ready-mix and precast producers). The certification evaluates concrete value chain companies across four key areas: environmental stewardship (reducing CO2 emissions, resource efficiency, biodiversity, circular economy), social responsibility (health & safety, human rights), governance (business ethics, transparency, legal compliance), and economic resilience. By meeting these criteria, certified companies can demonstrate their commitment to responsible sourcing and contribute to more sustainable construction.
For more information about the CSC certification visit www.csc.eco.
Get in Touch
ConcreteNexus LLC is an international consulting firm specializing in education, certifications, building codes and standards advocacy, as well as business development services for the concrete industry.
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