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Julie Rosenbach, Sustainability Director

As the Sustainability Director for the City of South Portland, Julie's role is to develop and adopt programs to address climate change, transition to clean, efficient, and renewable energy, facilitate waste reduction programs, improve alternative transportation options, minimize the use of toxics in the community, and educate people about sustainability.

She received her bachelor's degree in Russian History from the University of New Hampshire and a master's degree in International Environmental Policy from the Monterey Institute of International Studies. Prior to joining the City of South Portland, Julie worked as an Environmental Protection Specialist at the US EPA in Washington D.C. and as the Sustainability Manager at Bates College. 

Email: jrosenbach@southportland.org
Tele: (207) 347-4148


Cashel Stewart, Sustainable Transportation Coordinator

Cashel joined the Sustainability Office in January 2020 as the department’s first transportation-focused employee. He leads the Sustainability Office’s work in reducing greenhouse gas emissions associated with transportation and land use through the development and implementation of programs, projects, and policies identified in One Climate Future. Some of these projects include research and outreach related to electric vehicle/charging, designing complete streets and facilitating mode shift away from single-occupancy vehicles, and developing long-range plans that support sustainable, equitable transportation system growth.

He received his bachelor’s degree in Environmental Studies from the University of Vermont. Prior to joining the City, he worked for the City of Portland as a Transportation Planner. Cashel commutes to South Portland from Portland by walking, biking or telecommuting.

Email: cstewart@southportland.org
Tele: (207) 767-7611 x7546



Casey Zorn, Sustainability Program Manager

Casey joined the Sustainability Office in October 2020 and will be the interim Program Manager until the end of August 2022.  She assists in the development of campaigns and outreach materials that educate the community about current sustainability initiatives and garner support for new policies and programs. Her efforts largely focus on the Energy and Water Use Benchmarking Ordinance; waste reduction outreach and education; and communications related to One Climate Future, the City’s joint climate action and adaptation plan with Portland.

She earned a bachelor’s degree in Environmental Engineering and English from Tufts University. Prior to joining the City, she served with the GPCOG Resilience Corps where she was placed in the City of Portland Sustainability Office and worked alongside the One Climate Future team. A resident of Portland, Casey is excited to explore South Portland’s trails and conservation land.

Email: czorn@southportland.org
Tele: (207) 347-4147



Mia Ambroiggio, Resilience Corps Sustainability Fellow

Mia joined the GPCOG Resilience Corps and began serving with the South Portland Sustainability Office in November 2021. Her main focus is improving the reach and effectiveness of the Office's outreach and communications. You can read some of her work in the South Portland Sentry and Amjambo Africa!
She earned a bachelor’s degree in Environmental Studies and Communication Theory from Loyola University Chicago in May of 2021. During her undergraduate degree, Mia was heavily involved in advocacy and education through an intersectional feminist organization on campus and wrote on climate and justice as an opinion columnist for the Loyola Phoenix. Off campus, Mia interned with neighborhood environmental nonprofits and large cultural institutions in Chicago, creating climate and conservation communication and outreach materials, publishing environmental writing, and assisting in the development of sustainability programming. As a new resident of Portland, Mia is excited to be living (and working!) on the coast and can't wait to watch South Portland bloom in the spring.