Established in 1983

We are a highly motivated Team of Sales Professionals.  With over 75 years of combined experience, we can help customers with product development from concept to final production..  Our knowledge extends to all market segments, Medical, Industrial, Military, Consumer, Automotive, Lighting, & RF.


We take pride in accurate and timely responses to all inquiries.

Tom McGuire


Tom founded ESA Technical Marketing in 1983.  Tom had been the National Sales Manager for Chicago Miniature and is responsible for customers in IL. Tom has a BA in marketing from Lewis University.

Diana Nawrocki

Diana is responsible for customers in IL. Diana has a BA in business from Lake Forest University


Cell: 630.660.3596.

Cliff Gustafson

Cliff is responsible for customers in IL. 

Cliff' has a Bachelor of Science Degree in Electrical Engineering.


Cell: 630.776.7652

Email: cliffg@esareps.com

Sales Engineer

Sales Engineer

Sales Engineer


John Stromski

Sales Engineer

Diane McGuire

Inside Sales

John is responsible for customers in WI and far northeast IL.

John has extensive experience in electronic and electro-mechanical sales.


Cell: 262.893.4436

Email: johns@esareps.com. 


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Diane is responsible for inside sales and office management. Diane has a BA from Lewis University.


Office Phone: 630.428.5662

Email: info@esareps.com




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Cell: 630 248.1454

Office: 630.428.5662

Email: Tomm@esareps.com

Email: dianam@esareps.com