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Mary DeMarco is a seasoned sales executive with extensive experience in the energy sector. Currently serving as a Sales Executive at ILLCO, Inc. since July 2016, Mary previously held positions as a Business Development Manager at OpTerra Energy Services from January 2014 to 2016 and as an Account Executive at ConEdison Solutions from June 2012 to December 2014. At ConEdison Solutions, Mary focused on the development of energy performance contracting for both private and public end users in Illinois. Mary began their career at Honeywell, where Mary worked as an Account Executive from April 1986 to January 2012. Mary holds a Bachelor of Science degree in Business/Corporate Communications/Public Relations from Illinois State University.