Mission & Values
The SJE-Rhombus Story
Stephen P. Johnston registers Electro Systems as a business and begins production of the Tank Alert alarm system in his garage.
The business is incorporated and renamed S.J. Electro Systems, Inc.
SJE's first employee is hired.
An addition is built that doubles the size of the facility.
Five employees are active at S.J. Electro Systems, Inc. An addition of 44' x 74' is added to the existing building.
S.J. Electro Systems, Inc. makes INC magazine's list of the "500 fastest growing privately held companies in the nation" three years running.
S.J. Electro Systems Board of Directors adopts an Employee Stock Ownership Plan (ESOP).
A new building! S.J. Electro Systems, Inc. completes and occupies a new 30,000 square foot pre-cast concrete manufacturing building.
S.J. Electro Systems, Inc. adds a new product line and establishes expertise in designing and manufacturing control panels (Rhombus Technology).
Founder Stephen P. Johnston retires as CEO of SJE.
Lois Solheim is named the new CEO.
S.J. Electro Systems, Inc. begins doing business as SJE-Rhombus.
SJE-Rhombus becomes 100% employee-owned and 33,000 sq. ft. was added to the existing manufacturing building.
Lois Solheim retires as CEO.
Laurie Lewandowski is named the new CEO.
SJE-Rhombus acquires Tamarack Engineering, an embedded controls engineering firm located near Minneapolis, MN.
Printed Circuit Board production moves from C&D Electronics to SJE-Rhombus in Detroit Lakes, MN. Surface mount PCB equipment is installed and production for the Embedded Controls Group begins.
SJE-Rhombus acquires Control Works, Inc., a custom control panel facility located in Milford, Ohio.
SJE-Rhombus increases engineering and PCB capabilities with the addition of Compucon Co., located in New Hope, MN.
SJE-Rhombus opens a facility in Suzhou, China to better serve pump OEMs currently producing products in China.
SJE-Rhombus is named one of the '50 Best Small to Medium Companies to Work for in America'.
SJE-Rhombus acquires CSI Controls in Ashland, Ohio - a manufacturer of custom panels and on-site controls.
SJE-Rhombus acquires Best Controls Co. in Clearwater, FL - a manufacturer of custom panels and pump controllers.
SJE-Rhombus develops new line of innovative products using "floatless" technology.
SJE-Rhombus Suzhou receives TUV certification on the SJE Quest™ pump switch.
SJE-Rhombus creates facebook page.
SJE-Rhombus is recognized by American Heart Association for employee wellness initiatives.
Compucon Co. begins doing business as SJE-Rhombus.
Dave Thomas is named President.
Corporate website is redesigned.
SJE-Rhombus unifies the Engineered Control Solutions businesses (Best Controls, Co., CSI Controls, Control Works, Inc.) under the new master brand PRIMEX™.
PRIMEX™ website developed.
Laurie Lewandowski retires as CEO.
Dave Thomas is named CEO.
SJE-Rhombus expands from a three-year to a five-year limited warranty on most wholesale catalog products.
SJE-Rhombus acquires ICS Healy-Ruff™ in Plymouth, MN - a manufacturer and integrator of municipal control systems - and positions them within the PRIMEX engineered brand.
SJE-Rhombus celebrates 40th Anniversary (1975-2015) with a company picnic.
SJE-Rhombus acquires MCC Control Systems in Vacaville, CA - a systems integrator and automation solutions provider for municipal water, wastewater and industrial applications - and positions them within the PRIMEX engineered brand.
Steve Johnston 1976
SJ Electro Building 1980
Tank Alert® Alarm 1983
New Building Started 1988
Rhombus Technology 1992
Embedded Controls 2004
Suzhou Facility 2007
40th Anniversary 2015
Vacaville, CA 2016