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


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



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

Office Phone: 630.428.5662



Cell: 630 248.1454

Office: 630.428.5662