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.


Douglas R. Joens, P.E.

Senior Consultant and President Emeritus

joensd@powersystem.org | 763-755-5122 | Minneapolis, MN

Doug provides guidance in the areas of system planning and line design for both transmission and distribution. This guidance includes long range plans, construction work plans, and system protection and sectionalizing studies in addition to work order inspection and electric utility operations. Doug’s experience also includes power supply analysis and large power contract drafting and negotiation on behalf of our clients. He received his BS in Electrical Engineering with an emphasis in power systems from South Dakota State University at Brookings. He 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.


Jeffrey M. Triplett, P.E.

Vice President, Distribution Studies and Substation Design

triplettj@powersystem.org | 740-568-9220 | Marietta, OH

Jeff provides expertise in the areas of system planning, system protection, power quality investigations, and distributed generation interconnections. Prior to joining PSE, Jeff worked as the Engineering Manager for two Ohio distribution cooperatives, and as a Power Delivery Engineer for a G&T cooperative. Jeff received his BS in Electrical Engineering from Ohio University and is a registered Professional Engineer in multiple states.


Charles Plummer

Director, Communications Infrastructure

plummerc@powersystem.org | 608-268-3533 | Madison, WI

Charles leads a team of communication experts facilitating the strategic planning, evaluation, procurement, and deployment of mission critical communications infrastructure for our utility clients following smart grid technology roadmaps. He received his BS in Electrical Engineering from the University of Wisconsin at Madison. Charles has been working in the electrical utility industry for almost 20 years in various communications and application technologies.


Jim Weikert

Director, Utility Automation and Technology

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