Our Team

 Stacey Gallagher Tully, Executive Director

stacey@healthy-waltham.orgSGT Headshot

Stacey joins Healthy Waltham with decades of experience in health, human resources, sales/administration and business operations. She is well known as a dance and fitness instructor of students ages 2-92, at a multitude of venues to include; Waltham YMCA, Senior Citizen Center, schools and various gyms, as well as her work as President of the Friends of Waltham Senior Citizens, for which she received the honor of the 2014 Waltham Unsung Hero Award.

Last year, she ran for 9th Middlesex District Massachusetts State Representative against a long-term incumbent. She is well known as a community activist, with a hand on approach and known to work hard and get the job done. A Boston College graduate with a degree in Education, Stacey worked and traveled worldwide before returning to her home to raise her family with her husband Shawn. She is passionate about Waltham and very excited and energized to expand Healthy Waltham’s reach in our community.

Maria DiMaggio, Communications & Development Director


Maria DiMaggio is a Waltham resident with two children in the Waltham Public schools. An enthusiastic cook, gardener, and community volunteer, she worked previously in Corporate Communications and Marketing in the financial services industry for over 15 years. Maria was a founding member of “I to I” Waltham, a cooperative playgroup and parent support group. Maria earned a B.A. from Wesleyan University (CT) with a major in German, and received a Fulbright award for a year of study in Germany.  In addition to her work at Healthy Waltham, she also serves on the board of the Friends of the Waltham Public Library.

Reva Haselkorn, Program Coordinator & Chef Instructor

Chef Reva


Chef Reva Haselkorn’s love of cooking began at an early age helping her mother in the kitchen. She continued to expand her passion for food at Drumlin Farm camp by working in the garden and learning to gather eggs, milk cows and walk goats. Prior to joining Healthy Waltham, Reva worked as the Community Cook at Bethany House, a subsidized housing facility for single women, preparing healthy and comforting dinners for the community five nights a week. She graduated from Le Cordon Bleu College of Culinary Arts as the Valedictorian of her class in the Spring of 2012. Before studying at Le Cordon Bleu she earned a Bachelor’s degree at Princeton University from the School of Architecture and spent time teaching English and backpacking in South America. When not leading food demonstrations, cooking classes and healthy eating workshops through Healthy Waltham, Reva teaches cooking classes privately as well as through Jewish Family & Children’s Services, Share Our Strength’s Cooking Matters and Haley House’s Take Back the Kitchen program.