Contact Us


Green Advantage®
326 Park Avenue

Frederick, MD 21701

Scheduling a public or private GA Commercial Training: 

Karen Vander Laan 215.310.9784  

Scheduling a public or private GA Residential Training: 

Ruth at ruths@greenadvantage.org  or 301-788-3791

Questions about becoming an authorized training organization: 

540-822-9449  

Questions about the Certification Exam:

Ruth at ruths@greenadvantage.org  or 301-788-3791

General Questions:  540-822-9449