Senior Staff

Charles R. Nelson

Co-founder and Principal Engineer

​Charles holds a Master’s and Ph.D. in Civil Engineering from MIT. He is currently a registered Professional Engineer in Minnesota and Ohio. Charles oversees project planning, conceptualization, design, analysis and review of CNA’s engineering projects.

Marlys Nelson

Co-founder and President

​Marlys sets strategy and vision for the firm, planning, management of resources and the oversight of all of the finance and accounting.

Brent Nelson

Project Manager

​Brent specializes in underground construction, tunnels and deep cavern design and construction from project planning to design and construction administration. He is a registered Professional Engineer in Minnesota, Iowa, and Wisconsin.

​Bruce Wagener

Project Manager

​Bruce specializes in civil project design, planning and managing geotechnical investigations, site assessment, and baseline reports. He also has extensive experience in rock engineering support design, hydraulics and hydrology, groundwater analysis, vibration and damage potential analysis. He is a registered Professional Engineer in Minnesota, Illinois, and South Dakota and Professional Geologist in Minnesota.

​Leonard Krumm

Project Manager

​Leonard specializes in tunnel inspection and tunnel rehabilitation projects. Prior to coming to CNA Engineers he worked for the City of Minneapolis for 31 years where he managed the following divisions within the Public Works Department: Sewer and Tunnel Construction, Solid Waste/Recycling, Environmental Engineering, Rights-of-Way Management, and Engineering Operations. He is a registered Professional Engineer in Minnesota.