At Proactive Environmental Solutions, we earn trust by exceeding our clients’ expectations. We start by understanding your unique circumstances, needs, and goals. Solving your problem is our obsession, and finding opportunities for smarter environmental management is always an important consideration. Our comprehensive set of capabilities means that we can efficiently meet all of your compliance, impact assessment, modeling, monitoring, permitting, and resource management planning needs, allowing you to focus on doing what you do best.


We believe that a better, more sustainable future is possible, and that working with our clients to explore ways to improve their environmental performance will help get us there.

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Paul Eisen, CCM
CEO | Principal Scientist

Paul Eisen is a co-founder and Principal Scientist at Proactive Environmental Solutions, LLC. Paul has decades of experience in environment consulting and management, providing expert witness and litigation support in air quality and meteorology; Environmental compliance services, including environmental audits, permitting (Title V, NSR/PSD, SPDES), air quality modeling, air and meteorological monitoring, air pollution control technology reviews, Stormwater Pollution Prevention Plans, Spill Prevention, Control and Countermeasure Plans, etc.; Weather analysis and forecasting; Climatological analyses.

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Chris Geraghty, CCM
President | Lead Scientist

Chris Geraghty is a co-founder and Lead Scientist at Proactive Environmental Solutions, LLC. Chris provides environmental consulting and management services to commercial, industrial, and government clients across the U.S.  Chris has over 12 years of professional experience in the environmental consulting industry, with extensive experience across various industries, helping clients obtain the necessary environmental permits to support their operational needs, while strategically managing compliance risk and liability.  Chris serves as an active member of the American Meteorological Society and the Air & Waste Management Association, where he currently serves as the Past Chair for the South Atlantic States Section.

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Alex Eisen-Cuadra, Ph.D.
Vice President | Senior Scientist

Alex Eisen-Cuadra is a co-founder and Senior Scientist at Proactive Environmental Solutions, LLC. Alex has a B.S. in Chemistry with a specialization in Environmental Chemistry, and a Ph.D. in Chemistry with a specialization in Green Chemistry. Alex has over 10 years of professional experience as an environmental consultant, analytical chemist, and professor. Alex provides technical expertise with environmental compliance audits, air permitting (CAA, NSR, PSD, NESHAPs, Title V), environmental impact assessments, water permitting (CWA, SPDES, NPDES, Stormwater), RCRA compliance management, and instrumental analysis using USEPA methods.

Contact Information

(800) 820-0052

© 2021 by Proactive Environmental Solutions, LLC