Leadership Team

Douglas R. Joens, P.E.


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

As President of PSE and Manager of System Planning and Line Design, 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 the client. Doug graduated from South Dakota State University at Brookings, South Dakota with a BSEE with a power emphasis. Doug 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.


Erik S. Sonju, P.E.

Executive Vice President

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

As Executive Vice President, Erik is responsible for overseeing the firm’s activities related to transmission and distribution studies, line and substation design, and O&M guidance. Erik joined PSE 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 Bachelor of Science degree in Electrical Engineering from North Dakota State University with an emphasis in power systems and is a registered Professional Engineer in multiple states.


Jeffrey M. Triplett, P.E.

Vice President, Power Delivery Planning and Design

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

As Vice President at PSE, Jeff Triplett 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 Bachelor of Science degree in Electrical Engineering from Ohio University and is a registered Professional Engineer in multiple states.


Charles Plummer

Director of 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 PSE utility clients following smart grid technology roadmaps. He has been working in the electrical utility industry for almost 20 years in various communications and application technologies. Charles earned a Bachelor of Science degree in Electrical Engineering from the University of Wisconsin at Madison.


Josh L. Mulder, P.E.

Vice President, Energy Resources and Industrial Engineering

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

Josh leads PSE's energy resources and industrial engineering areas. His design responsibilities include power distribution, motor controls and automation, system coordination and arc flash studies, power quality analysis and energy efficiency audits. Prior to joining PSE, Josh worked for various consulting firms in the Midwest in the areas of engineering design, heavy industrial projects, and management of engineering operations. Josh has his B.S. in electrical engineering from Dordt College, a private liberal arts college in Sioux Center, IA. Josh is registered in multiple states.


Regional Team Leaders