Our History

In 1984, our founder Larry O'Brien set out to serve energy customers in the Midwest.
With an objective of providing a more cost-effective sales alternative for manufacturers of electrical power equipment, Larry built a team dedicated to energy customers through sales, engineering support, and application knowledge of our manufacturers’ products. Larry and his team had built a deep portfolio of major and local energy suppliers through honesty, integrity, and service.
In 2022, after decades of building a company, family, and legacy, Larry passed away. To carry on the level of service and trust, long-time sales manager and trusted leader Erin Vinci is leading M.J. Fein & Co MidAmerica into its next era of customer care, industry expertise, and serving as one of the Midwest's premier energy equipment suppliers.
We take great pride in working directly with our customers to share product knowledge, specifications, and costs for their projects' requirements. Let us take care of your energy needs as your partner in the power business.
With an objective of providing a more cost-effective sales alternative for manufacturers of electrical power equipment, Larry built a team dedicated to energy customers through sales, engineering support, and application knowledge of our manufacturers’ products. Larry and his team had built a deep portfolio of major and local energy suppliers through honesty, integrity, and service.
In 2022, after decades of building a company, family, and legacy, Larry passed away. To carry on the level of service and trust, long-time sales manager and trusted leader Erin Vinci is leading M.J. Fein & Co MidAmerica into its next era of customer care, industry expertise, and serving as one of the Midwest's premier energy equipment suppliers.
We take great pride in working directly with our customers to share product knowledge, specifications, and costs for their projects' requirements. Let us take care of your energy needs as your partner in the power business.
Our Mission
To provide deep product expertise, unrelenting customer service, and technical sales and advising to high-voltage energy providers in the Midwest.