Leadership Team

Erik S. Sonju, P.E.


sonjue@powersystem.org | 608-268-3501 | Madison, WI

Erik joined our team in 2006 as a Leader of System Planning and eventually became responsible for leading the firm’s efforts in transmission and distribution line design. Prior to joining PSE, he worked as a system engineer for a Michigan electric utility and as a planning engineer for a utility consulting firm in Minnesota. His areas of expertise are distribution and transmission planning, system protection and sectionalizing, distribution and transmission line design, power quality investigations, connection of large loads, facility agreements and project management. Erik received his BS in Electrical Engineering from North Dakota State University with an emphasis in power systems and is a registered Professional Engineer in multiple states.


Richard J. Macke

Vice President, Economics, Rates, and Business Planning

macker@powersystem.org | 763-783-5349 | Minneapolis, MN

Rich leads the Economics, Rates, and Business Planning practice area at PSE where he serves on both the Board of Directors and the Executive Committee. He and his staff provide services to utilities and the utility industry in areas concerning business strategy, cost of service studies, rate design studies, demand-side management programs, resource planning, performance benchmarking, mergers and acquisitions, regulatory support, and expert testimony. He is frequently called upon to speak to utility management, directors, commissioners, and industry associations on a broad range of topics related to utility economics, finance, rates, and business strategy. In addition, Rich is currently serving on a Customer-Owned Distributed Generation Committee for a G&T cooperative and on a Net Metering Rate Subcommittee with the Minnesota Rural Electric Association. He holds an MBA from the Carlson School of Management at the University of Minnesota and has nearly 20 years of experience consulting with electric utilities.


Josh L. Mulder, P.E.

Vice President, Energy Resources and Industrial Engineering

mulderj@powersystem.org | 320-978-8022 | Prinsburg, MN

Josh is responsible for power distribution, motor controls and automation, system coordination and arc flash studies, power quality analysis, and energy efficiency audits. Prior to joining PSE, he worked for various Midwest consulting firms in the areas of engineering design, heavy industrial projects, and management of engineering operations. Josh received his BS in Electrical Engineering from Dordt College in Sioux Center, IA. He is a registered Professional Engineer in multiple states.


Jim Weikert

Vice President of Utility Automation & Communications

weikertj@powersystem.org | 608-268-3556 | Madison, WI

Jim leads the SCADA, substation modernization, distribution automation, and outage management systems focus areas. He assists utilities in long-term strategies such as smart grid roadmaps, business cases and modernization plans. Jim leads design and deployment of SCADA/DMS/OMS systems for cooperative and municipal utilities. He received a BS in Electrical Engineering from the Milwaukee School of Engineering in Milwaukee, WI and an MBA from Edgewood College in Madison, WI. Jim has over 20 years of engineering experience in wireless communications, hardware and software development, utility SCADA systems, utility automation, operation technology and strategic planning of technical applications.


Regional Team Leaders