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Our Company

Learn more about GreenLogic and the people that make it great.

Long Island Solar Power Pioneers

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About Us

GreenLogic was founded in 2005, making us one of the longest standing solar power providers on Long Island. Since then, we’ve helped our customers save millions in energy bills. Our quality, reliability and high level of performance have made us one of the most referred solar panel companies on the Island. The longevity we’ve enjoyed is thanks to our talented team of energy consultants, designers, installers and customer service representatives, all of whom are some of the most educated and experienced solar power professionals in the area.

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Here are just a few of the things that make us unique: 

  • GreenLogic approaches each customer as a lifetime engagement, starting with our commitment to system output, reliable performance, and return on investment. Whether your system is 20 days old or 20 years old, we’ll provide the support you need.

  • We developed proprietary tools and methodologies to accurately predict and track system performance. These tools ensure our custom-designed systems produce the most power and savings at the lowest cost.

  • GreenLogic has won numerous industry awards for leadership, quality, and customer service including several utility Trade Ally Awards and SunPower's Residential Dealer of the Year Award.

  • GreenLogic is an active supporter of the Long Island communities that we live and work in. Each year we donate a solar power system and sponsor fundraisers as a way to give back.

Meet Our Founders

Marc, Nick and John joined forces to build a company that would help make the world (and especially Long Island) a better place.

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Marc Cléjan


Marc Cléjan has a proven track record of building successful and profitable businesses gleaned from more than 30 years of management expertise.  He left the corporate sector to found GreenLogic, a for-profit company aligned with his growing desire to help make the world a better place. In preparation for this new focus, he earned a Masters Degree in Environmental Management from New York University, and received his solar, wind, and geothermal certifications.

Previously, Marc was president of Odyssey Capital Corp., a Manhattan real estate investment and management firm specializing in corporate temporary housing. Prior to establishing Odyssey Capital, Mr. Cléjan was a corporate vice president at Health Management Systems, Inc. (HMSY) in New York City for 12 years, when he helped sales grow from $17 to $110 million, and the company issued a very successful IPO.  Mr. Cléjan earned a Bachelor of Science in Business from Cornell University.

He lives in East Hampton, N.Y., with his wife and two children.

Meet Our Team

Working around the clock to provide the best service from the beginning of the conversation until long after the solar installation. Our talented team makes going solar stress-free for homes and businesses.

Andrew Smith
Anne Mariconda
Brian Dorgan
Danny Volkomer
Jean Pierre (JP)
John Murphy
Kyle Guerra
Mark Allen
Matthew Burmeister
Michael Panzarino
Paul Kessler
Tamara Gajewski
Julie Sullivan
Cynthia Lewis
Morgen Hand
Robert Skypala 
Michael Kovar
Barbara Casciotta

Employee Testimonials

"GreenLogic is more than just a job; it's a family, and they have given me the tools and flexibility to succeed at both."
Tamara Gajewski
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Join Our Award-Winning Team

We're Hiring!


Roslyn Heights

200 S Service Rd

Suite 106

Roslyn Heights, NY 11577


40 Woodland Ave

Manorville, NY 11949

Southampton (HQ)

97 N Sea Rd #3

Southampton, NY 11968


Get in Touch

Get Started Today!

Give us a call or fill out the form to schedule your free consultation and start putting the sun to work for you.


You can always call us at 631.771.5152