Our Team

Lee Wasserman

Founder & Strategic Advisor

Mr. Wasserman is a 30-year nationally recognized environmental industry leader who specializes in property-oriented issues. Few in the industry have more years of environmental field and management experience than Mr. Wasserman. He is the founder and Strategic Advisor of LEW Environmental, which was established in 1991. During his two decades of environmental experience, Mr. Wasserman… Read More

Greg Krueger

Senior Vice President

Greg Krueger is Senior Vice President of Operations for LEW Environmental. In this position, Mr. Krueger oversees all day-to-day corporate operations for above ground remediation, below ground remediation, consulting and administration divisions. He joined LEW Environmental in 2003 as a Project Manager specializing in indoor air quality investigations. Over the years, Mr. Krueger has progressed… Read More

Melissa Guagenti

Vice President of Customer Success

Melissa Guagenti is the Vice President of Customer Success at LEW Environmental with experience in management, customer service, and marketing. Before her employment with LEW Environmental, Melissa studied Business Management and Marketing at Montclair State University and graduated with a B.S. in Business Administration in 2008. During her time at MSU, she was enrolled in… Read More

Ken Apen

Sales Manager

Kenneth Apen is an accomplished and highly experienced Business Development and Sales Professional with deep expertise in full-service Environmental Consulting, Training, and Remediation. He partners with clients across complex environmental challenges and develops tailored solutions to achieve safe and reliable outcomes. He skillfully guides clients across local, state, and federal environmental laws and regulations to… Read More

Michael Mosier

Senior Project Manager

Mike Mosier is an accomplished Senior Project Manager and Housing Authority Partner with over 10 years of experience partnering with clients to unpack complex environmental challenges. He brings deep expertise with environmental hazards and issues such as lead, mold, asbestos, radon, and indoor air quality. He brings order where there is chaos to provide critical… Read More

Jelena Ristic

Jelena Ristic is the Office Manager for LEW Environmental. In this position, Ms. Ristic oversees all day-to-day office operations for LEW’s consulting and administration divisions. She joined LEW Environmental in 2022 and has spearheaded our New Jersey Lead Law compliance programs.