Our Team

Our Executive Team


John Stensland
President and Owner 

 John Stensland has been in the office equipment industry his entire professional life, starting out selling fax machines and analog copiers in the 1980s. He joined Martin Business Group in 1999 as vice president and partner and became sole owner, CEO, and president in 2007. He is a familiar face in the community through his involvement in the Lake Geneva Rotary Club, where he has served as President and as Assistant District Governor for southern Wisconsin District 6270. He also serves as board member of the Lake Geneva Chamber of Commerce. John also is a noted amateur photographer. 

Rebecca Turk
General Manager

Rebecca Turk joined the Martin Group team in 2010 and became the General Manager in 2012. As our GM she oversees our finances, human resources, and our day to day operations. Rebecca graduated Lambda Pi Eta from UW-Milwaukee with a BA in Communications and she also gained 9 years of experience in the financial industry. In the rare times that Rebecca isn’t crunching numbers, setting goals, or working on spreadsheets – she enjoys theatre, traveling, and photography.

Ross Gruenwald

Ross Gruenwald
Field Service Manager

Ross is a 12 year veteran of the office and production equipment industry. He joined the Martin Group team in 2008. Ross started in the industry when a copier was just a copier and has evolved with the industry to the current multi-function devices. He is the recipient of multiple industry manufacturer awards from Konica Minolta, Toshiba, Ricoh, Riso, and Oki Data.

In his off time, Ross is a 1st Lieutenant in the Civil Air Patrol Civilian Auxiliary to the United States Air Force, where he is an aerospace education officer and leadership officer. He also enjoys breathing new life into vintage Oldsmobiles with his family.


Brian Willis
Field Service Supervisor

An 8-year Martin Group veteran, Brain Willis got his start in the copier repair business in 1985. As one of our Senior Service Technicians, he has fixed it all – from old analog copiers to today’s complex production printing systems. Brian holds two Gold Seal awards with Konica Minolta. The Gold Seal award is the highest recognition Konica Minolta presents to students that attend a certified training course. The awards are extremely difficult to achieve and require special recognition from the course director regarding the specified technician. 

In Brian’s off time he enjoys camping, target shooting and traveling.