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City of Milwaukee Sustainability Staff

Erick Shambarger, Director
(414) 286-8556

Erick is the Director of the City of Milwaukee Office of Environmental Sustainability. He was appointed by the Mayor in June 2015.  The Milwaukee Office of Environmental Sustainability was created by Mayor Tom Barrett to develop practical solutions that benefit Milwaukee’s environment and economy. Prior to his current role, he served as Deputy Director of OES for 5 years, and as City Economist before that. Mr. Shambarger oversees the Milwaukee Energy Efficiency (Me2) program and the Milwaukee Better Buildings Challenge, chairs the City’s Energy Reduction Team to reduce energy use across City operations, and promotes innovative storm water management practices and green infrastructure. Mr. Shambarger developed the idea of converting basements of abandoned properties into underground stormwater management structures called BaseTerns.  He contributed to the City’s ReFresh Milwaukee sustainability plan and manages the City’s PACE financing program.  He holds a Masters of Public Affairs degree from the University of Wisconsin and certificates in Water Technology and Energy Analysis and Policy.


Tim McCollow, HOME GR/OWN Project Manager
(414) 286-3748

Tim is the project manager for Milwaukee's HOME GR/OWN initiative. Tim comes to his work in community food systems through a non-traditional path. Trained as a zoologist & environmental/energy analyst, Tim spent over 2 decades managing natural gas purchasing and risk management for We Energies prior to starting in the City’s Office of Environmental Sustainability in 2010. As part of a City/CBO team, Tim helped to develop Mayor Tom Barrett’s HOME GR/OWN Initiative. Tim also serves on the Steering Committees for the Milwaukee Food Council and the Institute for Urban Agriculture & Nutrition.


Elizabeth Hittman, Environmental Sustainability Program Coordinator
(414) 286-5593

Elizabeth Hittman directs OES’s solar program, Milwaukee Shines, and is working to make it easier for home and business owners in Milwaukee to install solar. Elizabeth also works on green infrastructure and sustainable water projects with the goal of establishing Milwaukee as America’s Water-Centric City.  Elizabeth received her undergraduate degree in Natural Resource Management from UW-Stevens Point and a master's degree from UW-Milwaukee in Urban Geography. Prior to joining OES, Elizabeth served as the Executive Director for the Wisconsin chapter of the U.S. Green Building Council. In 2011 she joined the Midwest Renewable Energy Association as the Director of their Milwaukee office and worked on three U.S. Department of Energy grants expanding solar training across the Midwest and reducing the soft costs of solar.  Elizabeth serves on the Board of Directors of the Milwaukee Environmental Consortium, the Midwest Renewable Energy Association and the UW-Milwaukee School of Freshwater Sciences Professional Master’s Advisory Board.


Angela Mitchell, HOME GR/OWN & Me2 Programs Management Trainee
(414) 286-3475

Angela serves as the Management Trainee for Mayor Tom Barrett's HOME GR/OWN initiative to facilitate community outreach, engagement, and stakeholder relations management. She also works with the Milwaukee Energy Efficiency (Me2) program and the Milwaukee Better Buildings Challenge. Prior to joining the City of Milwaukee, she worked in the financial services industry for Northwestern Mutual and Robert W. Baird. She graduated from Cardinal Stritch University with a bachelor’s degree in business management. Currently, Angela is pursuing her MBA with a focus on Strategic Leadership.


Rose Buss, Energy Efficiency Program Coordinator

Rose is the program coordinator for the City’s energy efficiency programs, including the Milwaukee Energy Efficiency (Me2) program for homeowners, the PACE financing program for businesses, and the Better Buildings Challenge. Rose received her undergraduate degree in International Relations with a concentration in Environment and Development from Boston University and holds a Master’s degree in Environmental Policy and Planning from the University of Michigan. Prior to joining OES, Rose worked for the City of Ann Arbor on improving energy efficiency in rental housing and on connecting those working on sustainability across the state of Michigan through the Michigan Green Communities program. She also worked with General Motors on making the sustainability business case for an internal price on carbon and a sustainable supply chain. Rose is currently a member of the leadership committee for the Milwaukee Green Drinks group.