The Advanced Green Technologies Team

In the solar construction industry, it’s not only how the job’s performed, it’s who the people are, doing it. Their skills, their involvement, their professional demeanor. Hundreds of dedicated individuals make up the team at Advanced Green Technologies, and not only do they want your respect, they want you to like them. “Nice” is important to us. As is “courteous, efficient, exacting, honest, ethical, flexible, accommodating, logistical, knowledgeable.” There’s not an “it’s-not-my-job” attitude in the bunch. In fact, every job is everyone’s job. So there’s always someone there with an answer or who knows how to get something resolved. We work smart and safe. We train and train some more. With our team, anything and everything is humanly possible.

Meet the Team

Rob Kornahrens CEO
Founder & CEO

Rob Kornahrens

Rob Kornahrens is the Founder and Chairman of Advanced Green Technologies. A leader in the construction industry for four decades, Rob has grown his company to over 500 employees with seven offices in the state of Florida; and annual revenues between $110-$130 million.


Degree in Business Administration from the University of Arizona

Clint Sockman VP
Vice President

Meet Clint Sockman

Clint Sockman oversees all sales and operations for Advanced Green Technologies in Florida and the Caribbean. He has more than two decades of experience in Field Operations and Construction Management of Commercial, Industrial, and Institutional roofing and solar energy projects. Additionally, Mr. Sockman has successfully lead teams to the completion of over 350 Megawatts of solar installations.


The University of Cincinnati, Information Systems minor in International Business. Member of the American Society of Professional Estimators (ASPE). Constructions Specifications Institute (CSI). The state of Florida licensed solar contractor. North American Board of Certified Energy Practitioners (NABCEP).

Michael Kornahrens VP

Michael Kornahrens

As Co-Founder and President of Advanced Green Technologies, Michael Kornahrens develops and implements the strategies, relationships, and standards for the company. Born into the Construction Industry, Michael has successfully completed over 500 solar installations throughout North America, as well, as earning the top commercial solar contractor ranking in the state of Florida 2011-21.


Degree in Management from Florida Atlantic University

Brian Cardona Safety Director
Safety Director

Bryan Cardona

With a decade of experience in the areas of occupational safety and health management, Bryan Cardona leads the Safety Division at Advanced Green Technologies. Bryan’s goal for Advanced Green Technologies is to continue being an industry leader in safety while promoting a safety culture and growing OSHA partnerships.


Bryan is an OSHA Authorized Construction Trainer which allows him to implement the OSHA 10 and 30-hour training courses for our field staff.

2016 Construction Association of South Florida (CASF) Safety Professional of the Year Award.

matt jefferies
Director of Sales

Matt Jefferies

After spending 17 years with General Electric and servicing material needs for the construction industry, Matt entered the contracting world with Advanced Roofing and Advanced Green Technologies in 2018. As Director of Sales & Strategic Accounts, Matt holds responsibility for end-to-end client satisfaction. He serves as a single point of contact for select strategic accounts from project discovery through proposal development and project delivery.


B.S. in Marketing from the University of Indianapolis, possesses Six Sigma Green Belt Certification, and has received several awards from GE including but not limited to: CEO Round Table Advisor 2006-2012; All-Star Award 2002-2003; Wired to Inspire Award 2013.

Tom Griffith
Sales Executive

Tom Griffith

Tom Griffith is a Sales Executive for Advanced Green Technologies. He is responsible for crafting proposals and financial models that align with customer goals and priorities. Having worked in the renewable energy industry since 2016, he has successfully completed and sold over 90 million dollars of solar projects.


Undergraduate studies in Finance with a minor in Environmental Sciences at Alma College. NABCEP PV Technical Sales Certified.

Darrin Lindsay
Director of Pre-Const.

Darrin Lindsay, LEED AP BD+C

Darrin oversees the design & estimating process for solar projects. He has over 12 years of experience as an estimator and project engineer. Mr. Lindsay has successfully managed over 70 million dollars in heavy civil and commercial construction, as well as over 25 million dollars in solar projects.


Bachelor of Science in Building Construction, University of North Florida

Julia Barton
Key Account Executive

Julia Barton

With experience in commercial solar in the European market, Julia joined Advanced Green Technologies in 2021. She has consulted large-scale C&I companies and Fortune 500 companies in reaching their sustainability goals. For AGT, she is responsible for new construction projects and serves as the single point of contact for General Contractors, Architects, and Developers.


BBA in International Business & Management from the University of Amsterdam

Tim Ding
Project Engineer

Tim Ding

Tim Ding joined Advanced Green Technologies in 2013, bringing more than 10 years of solar PV system design experience to the team.  He is a NABCEP Certified PV system Inspector, and through his studies at the Memorial University of Newfoundland, he possesses a B.S. in Engineering Physics and an M.S. in Organic Solar Cell/Organic LED. As Sr. Process Manager at AGT, Tim designs solar PV packages and Energy Storage Systems (ESS).

Greg Bates
Solar Service Manager

Greg Bates

With more than 20 years of experience in the electrical construction and facility maintenance industries, Greg joined Advanced Green Technologies in 2020. He is a Licensed Electrician (FL) and attended electrical trade school in Atlanta, GA through the National Joint Apprenticeship and Training Committee 5-year apprenticeship program.  As the Solar Service Manager for AGT, Greg leads a department that strives to maintain, troubleshoot, and upgrade all Solar, EV, and networking systems while providing superior service that results in 100% customer satisfaction. Greg takes a personal approach to his work and treats each client’s solar assets as if they were his own. With a solution-minded approach, his team performs routine maintenance inspections, resolves issues, maintains systematic documentation, and remains on top of the latest technologies in the DG and EV Industries.  A fun fact about Greg is that he is a published author with a passion for research and enjoys studying and applying what he learns.

Chief Financial Officer

Advanced Roofing welcomed Diane Craig to the team in 2022.  Diane has worked with large public manufacturing companies and has many years of experience in various industries, including electronics, oil and gas, aerospace, and commercial lighting. As Chief Financial Officer, she provides financial leadership to drive growth and efficiency and values positively impacting customers, employees, and the local community. Diane studied accounting and is a graduate of Glasgow Caledonian University and a Fellow member of the Association of Chartered Certified Accountants (FCCA). You can find Diane on the green enjoying a round or two of golf when not in the office.

Bob Bruno
Business Development

Robert (Bob) Bruno has been advising commercial customers on the benefits of Solar for over 16 years. He delivered consulting engagements for large commercial and public sector businesses, supporting their sustainability objectives. Bob represents AGT on the Saint Petersburg Chamber Sustainability Committee. He enjoys educating clients on solar, establishing strong relationships, and delivering win-win solutions. At AGT, Bob develops new commercial opportunities for Solar
and Roofing projects.


Undergraduate studies in Environmental Science at Kean University, New Jersey

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