who we are

O'Shea Environmental Associates, Inc. (OEA) is a full-service environmental engineering firm offering expert consultation to industrial, commercial and institutional clients in various areas of environmental concern. 

With offices centrally located in the Chicagoland area, OEA excels at customizing solutions and services to meet the unique needs of each client.


For more than 20 years, OEA has focused on providing responsive and professional services that minimize the burden of environmental regulatory requirements for our clients.


            • Who’s Who in Environmental Engineering
            • American Academy of Environmental Engineers
            • National Society of Professional Engineers
            • Illinois Society of Professional Engineers
            • Air & Waste Management Association
            • Midwest Cogeneration Association



news & events

EPA Issues Proposed NESHAP Amendments to Include Ethylene Oxide. (Read More)

USEPA-Reported Greenhouse Gas (GHG) from Large Facilities Drop Approximately 5% between 2018 and 2019. (See Interactive Fact Sheets)

USEPA Announces Most Recent Biden Administration Appointees (See Biographical Summaries).