Staff Bios

Mark Maassel


Mark Maassel brings a unique blend of electric utility executive leadership, engineering knowledge and a demonstrated commitment to civic engagement to the Indiana Energy Association (IEA) in his position as president. Maassel has devoted his career to help ensure that Hoosiers enjoy access to affordable and reliable energy for their homes and businesses.


“Indiana Energy Association member companies are committed to the customers they serve,” says Maassel, “just as the Indiana Energy Association is focused on securing policies that enhance our members’ ability to deliver affordable, reliable and increasingly cleaner energy to all Hoosiers.”


Maassel has served as President and CEO of the regional business membership economic development organization, Northwest Indiana Forum, and has held multiple senior level leadership positions at the Northern Indiana Public Service Company (NIPSCO), including serving as president.   His prior leadership roles in the energy industry include membership on the Gas Technology Institute Board of Directors, Edison Electric Institute Board of Directors and participation on various American Gas Association committees.  Maassel has also served as Of Counsel for the law firm of Krieg DeVault.


With a dedication to civic involvement, Maassel has held multiple community leadership positions, including chair for the 2008 United Way of Porter County Campaign, Chair of the Porter County Community Foundation, President of the Crisis Center Board of Directors, and Board president of the Valparaiso Community Schools.  In 2008 he was selected for the inaugural class of the Northwest Indiana Business Hall of Fame and received a “Sagamore of the Wabash” award from Governor Mitch Daniels.


Maassel holds a degree in Civil Engineering from the University of Minnesota, along with a juris doctorate from Chicago-Kent College of Law.

Tim Rushenberg

Tim Rushenberg

Vice President

As a veteran of the U.S. Air Force and having served in many leadership and executive positions in the private sector and state government, Tim Rushenberg has demonstrated his commitment to public service, a quality he brings to the Indiana Energy Association as vice president, working on improving the economy and quality of life in Indiana.


Prior to joining the IEA, Tim was Vice President of Governmental Affairs & Tax Policy for the Indiana Manufacturers Association where he led their lobbying efforts at the Indiana statehouse.


Before joining the IMA, Tim was president of an Indianapolis-based company that provides technology solutions for liquidating real property and collecting delinquent taxes on behalf of over county governments in four states (Indiana, Michigan, Iowa, and Florida).


Prior to his experience in the private sector, Tim was General Counsel and Commissioner of the Indiana Department of Local Government Finance under former Governor Mitch Daniels. At DLGF, Tim ensured the timeliness of the state’s property tax billing process and revised the real and personal property assessment regulations.


Tim’s early career with the U.S. Air Force included positions as Assistant Staff Judge Advocate and Area Defense Counsel. During this period, he prosecuted 25 courts-martial and administrative discharge board proceedings, served as the Chief Counsel to the Aerospace and Arizona Days airshow, and participated in the largest public integrity investigation in the history of the FBI as Chief of Military Justice at Davis-Monthan Air Force Base in Tucson, AZ. Tim is a Distinguished Graduate of the Air Force Squadron Officer School at Maxwell Air Force Base in Montgomery, Alabama.


Tim is a Six Sigma Green Belt. He has published articles for the American Bar Association, National Review Online, and other publications on topics as diverse as taxes, national politics, HIPAA, and international law.

Tim received a B.A. in Political Science from Indiana University in South Bend and a Juris Doctorate, Law degree from Valparaiso University School of Law. Tim is a native of Elkhart and currently resides in Brownsburg with his wife Kristin and their eight children.