About
Leadership
John Stevens
Chief Executive Officer
Mr. Stevens was named Chief Executive Officer in April 2021. Before taking his current position, he was Chief Operations Officer, beginning in August 2017. Prior to joining SES, Mr. Stevens was Senior Vice President of Technical Services and Regional Vice President at Clean Harbors Environmental Services from November 1991 to August 2017. He spent four years in the military as a captain in the U.S. Army. Mr. Stevens holds a Bachelor of Science degree from Marshall University.
Jeff Sweren
Chief Financial Officer
Mr. Sweren joined SES as Chief Financial Officer in August 2019. Prior to SES, Mr. Sweren spent 29 years in the environmental services industry in a variety of senior financial positions. Most recently, he was Controller at Liquid Environmental Solutions. From 2011 to 2016, Mr. Sweren held roles of increasing responsibility, including Chief Financial Officer of SWS Environmental Services. Prior, he served as Vice President of Finance and Group Controller at Clean Harbors Environmental Services. Mr. Sweren holds a Bachelor of Economics degree from Saint Mary’s College of Maryland.
Blake Brown II
Chief Operating Officer
Mr. Brown was named Chief Operating Officer in March 2024 after serving as Vice President of Industrial Services since 2021. Mr. Brown joined SES in 2019 in the role of Regional Operations Manager. Prior to joining SES, Mr. Brown spent nearly 16 years at HydroChemPSC, in roles of increasing responsibility, including Location Manager and Area Manager. Mr. Brown holds a Bachelor’s Degree in Business Administration and Management from Malone University.
Todd Hormann
Vice President of Product Destruction
Mr. Hormann was named Vice President of Product Destruction in January 2020 after SES acquired Resource One. Before taking his current position, he was Chief Operating Officer of Resource One from March 2001 to January 2020. Prior to joining Resource One, Mr. Hormann worked for Honda of America Manufacturing for ten years as their Corporate Assistant Manager with environmental compliance responsibility for four Honda manufacturing locations in Ohio. Mr. Hormann holds a Bachelor of Science Degree in Hazardous Materials Management from the University of Findlay.
Jim Kuehn
Vice President of Sales and Marketing
Mr. Kuehn joined SES as Vice President of Sales and Marketing in June 2022. Mr. Kuehn has more than 35 years of experience in the environmental and industrial services industries. Most recently, he was Vice President Operations of the Midwest region for ACV Enviro. Throughout his career, Mr. Kuehn has held roles with increasing responsibly in such noted companies as National Response Corporation and Hydrochem Corporation. Mr. Kuehn holds a Bachelor of Science Degree in water science with a concentration in chemistry and biology from Northern Michigan University. He also holds a Masters of Business Administration from Detroit College of Business.
Mike James
Vice President of Environmental Services
Mr. James was named Vice President of Environmental Services in April 2021. Before taking his current position, he was Waste and Recycling Division Manager from November 2019 to April 2021. Prior to joining SES, Mr. James spent nearly 16 years in sales at Clean Harbors Environmental Services. Mr. James holds a Bachelor's Degree in Environmental Studies from the University of Evansville.
Lona Pregon
Vice President of Human Resources
Mrs. Pregon joined SES in April 2024 as VP Human Resources. Mrs. Pregon has over 20 years of Human Resource Leadership experience. Prior to joining SES, Mrs. Pregon was HR and Talent Development Director at Carvana and has held various HR leadership positions in mining, manufacturing and B2B service sectors. Mrs. Pregon holds a Bachelor of Science in Industrial Organizational Psychology from Middle Tennessee State University and an MBA from Augusta State University.
Floyd Keller, CSP, CIHM
Director of Environmental, Health and Safety
Mr. Keller joined SES in July 2018 as Director of Environmental, Health and Safety. Prior to joining SES, he spent more than 18 years at Clean Harbors Environmental Services as Vice President of Health and Safety, Director of Health and Safety, and Regional Health and Safety Manager. Mr. Keller began his career in safety as a Safety, Security and Environmental Technician for the Toyota Technical Center. Mr. Keller is a Certified Safety Professional (CSP) and Certified Industrial Hygiene Manager (CIHM) and holds a Bachelor of Arts degree in Chemistry from DePauw University.
