Office of Sustainability staff and students

Ellen Dux

Office of Sustainability Associate Director

Throughout her career in sustainability, Ellen Dux has garnered significant experience working on a broad range of renewable energy, clean power, and cleantech initiatives. Her primary focus is stakeholder engagement and communications, grant fundraising, and program development.

Most recently, Ellen worked closely with the Los Angeles County Chief Sustainability Office to help launch the Clean Power Alliance, Southern California’s new clean energy utility. She also has partnered with the Los Angeles Cleantech Incubator to develop and source funding for a large-scale energy efficiency buildings retrofit program. From 2014 – 2016, Ellen worked extensively with the Viterbi School of Engineering’s Information Sciences Institute on the Department of Energy’s Los Angeles Department of Water and Power Smart Grid Regional Demonstration Project. She began her sustainability career working in utility-scale PV.

Prior to transitioning to sustainability, Ellen held a number of senior positions in the entertainment industry, including Executive Director of 20th Century Fox’s mobile content division. She also co-founded a filmed entertainment production company with musician Peter Gabriel.

Ellen holds a B.A. in Foreign Affairs from the University of Virginia, and an M.B.A from the University of Southern California Marshall School of Business.


Joshua Sierra

USC Office of Sustainability Program Specialist, Zero Waste Coliseum and Campus Initiatives

Josh recently joined USC’s Office of Sustainability as the Zero Waste Diversion Coordinator, working to ensure the continued success of the University’s Zero Waste initiatives at the Memorial Coliseum for Trojans and Rams games, in addition to helping to develop waste diversion strategies and programs across campus. Josh is a staunch advocate for environmental sustainability with a broad range of experience in the field, from local and state policy research and development, to the assessment and monitoring of corporate social responsibility benchmarks for private enterprise.

Most recently, Josh worked at the Walt Disney Company’s Environmental Assessment division, evaluating companywide environmental impacts and mitigation measures, and assisting in the management of Disney’s Climate Solution Fund and the company’s carbon offset investments. Prior to Disney, Josh worked for The Association of California Cities-Orange County, where he was tasked with researching, tracking, analyzing, and briefing local policy makers on emerging environmental issues and related legislation.

Josh holds an M.S. in Environmental Studies with a specialization in Sustainability from California State University Fullerton. His Master’s thesis examined waste diversion practices and strategies at large-scale venues and high attendance events.


Elias Platte-Bermeo

Sustainability Program Assistant

Elias joined the Office of Sustainability in July, 2019. As a recent college graduate, he brings an understanding of the obstacles and opportunities in advancing sustainability on a college campus. 

While in school, Elias worked for UCLA’s Housing Sustainability Manager to promote sustainability in Housing and Dining operations and to coordinate engagement efforts with residents. 

Elias served as the co-director and course instructor of UCLA’s Sustainability Action Research, a program that pairs groups of undergraduates with campus stakeholders to find innovative opportunities to further sustainability across the university. He designed and directed seven student projects working in areas like waste, transportation, food justice, and campus resilience.

Off campus, Elias has worked for the City of Palo Alto’s Community Services Department, where he analyzed city policies and programs to inform recommendations aimed at increasing the equity and efficiency of community programs. He also worked for Pacific Gas & Electric Company’s Land and Environmental Management team where he supported the Air Quality, Water Quality, and Hazardous Materials teams and tracked statewide regulations to ensure facility compliance. 

Elias holds a B.A. in Geography/Environmental Studies with a minor in Public Affairs from UCLA. 


Office of Sustainability Student Staff

Interested in joining the Office of Sustainability team as a student worker? Reach out to us at


Campus Sustainability Partners

Zelinda Welch

Energy Manager, Facilities Management Services

As the Energy Manager at USC, Zelinda directs the implementation of the City of LA Existing Building Energy and Water Efficiency Program, tracks Green House Gas (GHG) emissions from the building portfolio, and acts as the point of contact for the utilities.

Zelinda comes to the Sustainability Team with ten years of experience in energy efficiency and renewable energy.  Prior to joining USC, she worked as a Program Manager at Partner Energy, an energy efficiency and sustainability consulting firm, where she oversaw large-scale commercial and residential energy audits, retro-commissioning, and sustainability projects.  Additionally, she worked on both commercial and utility-scale solar projects and initiatives and has run utility-funded programs such as SCE, SCG, and SDG&E’s Continuous Energy Improvement Program, which helped companies building long-term strategic energy plans.

Zelinda holds a B.A. in International and Intercultural Studies from Pitzer College, a member of the Claremont Colleges, and an M.B.A from the University of Southern California Marshall School of Business.


Nichelle Mitchell-Huizar

Sustainability Administrator, Auxiliary Services

Nichelle comes to the Sustainability Operations/Programs Administrator position with a 20-year background in University Finance, Operations, and Logistics. She partners with all Auxiliary Services business units on sustainability programming, engagement, and communications. These units include the USC Bookstores, USC Hospitality, USC Transportation, USC Housing, USC Hotel, and the Los Angeles Memorial Coliseum. In this role, Nichelle’s primary focus is to assist the units with their economic, environmental, and social efficiencies regarding sustainability.


Gina Whisenant

Waste and Recycling Manager, Facilities Management Services

Gina Whisenant has considerable experience creating and implementing waste diversion and recycling programs for large commercial operations. Formerly at Republic Services, she participated in the launch of RecycLA, Los Angeles’ new municipal trash collection and recycling program aimed at reducing waste in local landfills.


Daniel Mazmanian

Chair, Presidential Working Group on Sustainable Education, Research, and Operations

Daniel A. Mazmanian is a professor at the USC Sol Price School of Public Policy. He served as the school’s Ione L. Piper Dean and Professor from 2000-2005. Before coming to USC, he served as dean of the School of Natural Resources and Environment at the University of Michigan. He has been a member of the Board of Trustees of the John Randolph Haynes and Dora Haynes Foundation since 1994.

Professor Mazmanian is a widely published scholar in the field of policy implementation and environmental policy. His current research focuses on climate change policy. He is recipient of the Aaron Wildavsky Enduring Contribution Award from the American Political Science Association and the Thomas R. Dye Service Award from the Policy Studies Organization

He now serves as the chair of USC’s Presidential Working Group on Sustainable Education, Research, and Operations, a collaborative effort to develop a comprehensive, university-wide approach to sustainability.


Nicholas Hudson

Project Specialist, Office of the President

Nicholas is a Project Specialist at USC’s Office of the President and helps oversee special projects for the President and Chief of Staff, including on topics of sustainability, campus mental health, and board-related endeavors. He began working in the Office of the President as its first and only undergraduate student and specialized in assisting the Chief of Staff. He has also worked with California State Senator Bob Hertzberg, LGBTQ advocacy nonprofit Equality California, and Gavin Newsom’s gubernatorial campaign.

Nicholas found his way to USC through QuestBridge, a merit-based college access program where he received two national-level awards. Since arriving at USC he has been a dedicated Trojan, having worked for three presidents of the university and is a Political Science graduate from the Dornsife College of Letters, Arts, and Sciences.


Zero Waste Team, Los Angeles Memorial Coliseum

The Los Angeles Memorial Coliseum is the two-time winner of the Pac-12 Sustainability award for a zero waste sports venue (2016 and 2017), and was honored with the Los Angeles County Board of Supervisors Green Leadership award in 2019. The Coliseum operations team partners with the USC Office of Sustainability, Republic Services, Legends Concessions, Marsden Custodial Services, Athens Waste Management, BASF, and Fox Sports to run USC’s first zero waste program, and has diverted almost 800 tons of waste from local landfill since 2015.