Originally operating out of a single facility in downtown Sioux Falls, ESI began as a small startup with big ambitions.
Electronic Systems, Inc. Original Building
Founded by Leo Reynolds in 1980, ESI was made possible by the generous investments of three members of the Stewart family: David, Roger, and Gordon.
Leo Reynolds
1990
As customer demand grows, ESI relocates production to a larger facility and subsequently built an extension for additional space.
ESI commemorates 10 years in business, celebrating expanded capabilities and a growing reputation for quality and reliability.
2000
ESI celebrates two decades of success! The next decade brings more growth and the addition of a third building to ESI’s expanding facilities.
ESI hosts the inaugural Supplier Day, further strengthening supply chain relationships and demonstrating a commitment to collaboration and customer success.
2010
Over the next decade, ESI’s legacy of continuous improvement in customer service is backed by strategic investments in technology and talent to enhance capabilities.
2020
ESI celebrates 40 years!
Over the past four decades, ESI has experienced growth and innovation, while remaining rooted in the values that have built a reputation of legendary service.
ESI broke ground on a major expansion, connecting two existing buildings and adding 18,000 square feet of production space, increasing capacity by 60%.
With every milestone, we continue to innovate, adapt, and grow.