Our Team

SAGE is headquartered in Portland, Oregon, and led by an executive director and eight volunteer board members. Our team is also supported by other volunteers and pro bono advisors. 

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SAGE's Staff and Board of Directors


Steve Higgs, Steve_Higgs.jpgExecutive Director

Steve Higgs leads SAGE’s efforts to engage people over fifty in causes and initiatives that are vital to the needs of children, youth, and future generations. He is responsible for implementing SAGE’s programs, and managing its communications and financial operations. He lives in Portland with his wife and two young children, who remind him that the well-being of future generations depends on the choices each of us makes today.

Steve can be reached at shiggs@wearesage.org and (971) 717-6570. You can also connect with Steve on LinkedIn at www.linkedin.com/in/stephenhiggs. For more information about Steve’s background, please click here.


Michelle Castano Garcia

Michelle Garcia is a Principal and Relationship Manager with Northwest Investment Counselors, LLC, specializing in trust and estate planning, financial planning, and investment management. She has over 30 years of volunteer experience with a variety of nonprofits, and currently serves on the Board and Executive Committee of the Sisters of St. Mary of Oregon Ministries, as a member of the Metropolitan Leadership Council of the Oregon Community Foundation, and on the Planned Giving Committee of the Ronald McDonald House of Charities. She holds a Bachelor’s degree in Rhetoric and Communications from the University of Oregon, and graduated from Cannon Personal Trust School at Boston University. 


Ward Greene, President and Chair

Ward Greene is the Managing Partner of the commercial law firm of Greene & Markley P.C. He has practiced law for forty years, served as President of the Multnomah Bar Association and Vice President of the Oregon State Bar. In addition to serving on SAGE’s Board, Ward currently serves on the Board of Albina Opportunities Corporation. Ward has a B.S. in business from Florida State University, followed by a J.D. from Duke University.


Bill Hallmark, Board Member

Bill Hallmark practiced law for thirty years before retiring. He has forty years of volunteer experience focusing on nonprofits that tackle global challenges related to war and the environment. Bill has a B.A. in political science from Stanford, followed by a J.D. from the University of Oregon.


Mary Markley, Board Member

Mary Markley has worked as the Alumni Director for Lewis & Clark Law School, and as an Account Manager for First Data Corporation. Mary has over 30 years of volunteer experience focusing on nonprofits that advance civic engagement.  She is a former Board Member of the Multnomah Athletic Club, the Multnomah Athletic Club Foundation, Folktime (an organization for adults with mental illness), the University Club Foundation (served as President) and is a past member of the Junior League of Portland. She has a B.S. in Communications from Portland State University.


Diane Ponti, Board Member

Diane Ponti is a writer, editor, and storyteller, and has worked as a public school teacher and bond broker. She has 20 years of volunteer experience focusing on nonprofits that promote writing and literature, including as Board Chair for Literary Arts. Currently, Diane also serves on the Board of Portland Story Theater. She has a B.S from Oregon State University and an M.S. from Portland State University.


Dick Roy, Board Member

Dick Roy is the co-founder and Managing Director of the Center for Earth Leadership, which trains and empowers Northwest citizens to assume a leadership role in forging a sustainable culture. He left his law practice at Stoel Rives in 1993 and has served as a full-time volunteer for 20 years to advance the Northwest sustainability movement. He is the co-founder of numerous nonprofit organizations including Chess for Success, the Oregon Natural Step Network, and the Northwest Earth Institute.  He has a B.S. from Oregon State University, an M.S. from Stanford in engineering, followed by a J.D. from Harvard Law School.


Jeanne Roy, Board Member

Jeanne Roy is the co-founder and Education Director of the Center for Earth Leadership. She is a recognized leader of Oregon’s environmental movement and has served as a full-time volunteer for 35 years. She is the co-founder of numerous organizations including Recycling Advocates, Portland’s Master Recycler Program, the Oregon Natural Step Network, and the Northwest Earth Institute. Jeanne serves as a continual advisor to public agencies on environmental policy matters. She has a B.S. in Humanities and Social Science from Oregon State University.


Elizabeth Schellberg, Secretary

 Elizabeth (Liz) Schellberg is the Controller of Yule Tree Farms, LLC and a retired Certified Public Accountant. She has also worked for nonprofit and religious institutions. She has 20 years of work and volunteer experience with a variety of nonprofits – both in operations and board membership – involved in the environment, peace and justice, the arts, healthcare, and crisis intervention. She has a B.A. in philosophy from Washington State University and a Masters of Divinity from San Francisco Theological Seminary.


Randy Sell, Treasurer

Randy Sell is an experienced banker and, most recently, served as Senior Vice President & Private Banking Manager at Northwest Bank. He has over 25 years of volunteer experience focusing on nonprofits that help children, including serving as Board Chair of the Portland Parks Foundation, Trillium Family Services and Waverly Children’s Home.  Randy has also served with the Oregon Ethics in Business, YMCA of Columbia-Willamette, St. Andrew Legal Clinic, University Club, and Loaves & Fishes. He has a B.S in Business from Oregon State University.