About Us

Our Management Team


Mariellen Donohue
Mariellen Donohue   President     

Mariellen is a graduate of Villa Maria Academy in Malvern, PA and Villanova University in Villanova, PA with a Bachelor of Science degree in Accountancy.  Mariellen has been with Avalon Energy since 2009 and specializes in LED Lighting Design, Rebates, & Project Management in addition to electric rate and energy usage savings and works with many owners & facility managers of Data Centers, Office Buildings, Hotels, Hospitals, Car Dealerships, School Districts & Government Buildings.


Tony Biggins
Tony Biggins         Vice President

Tony is a graduate of Malvern Preparatory in Malvern, PA and studied Business Administration at Villanova University in Villanova, PA.  Tony heads our Agent Partner Channel and has been with Avalon Energy since 2010.  In addition to electric and gas rate savings, he specializes in Commercial Electric Generator Installations and Rentals, LED Lighting and Electric Retrofits and works with many Golf & Country Clubs, Restaurants, School Districts, Medical Facilities and Manufacturing Plants.

To Contact Us:

Business Hours

Monday - Friday 8 a.m. - 5 p.m.

Other times by appointment


Avalon Energy is a Certified Woman Owned Business and member of the Women's Business Enterprise National Council

Woman Owned Business

and are proud supporters of the following:

Forgotten Cats - A non-profit cat rescue organization helping abused, abandoned and feral cats in Pennsylvania, Delaware and New Jersey.

Second Chance Rescue - A non-profit dog and cat rescue helping abused and abandoned animals up and down the Eastern Seaboard from NY to South Carolina.