A small Governing Board holds responsibility for strategic oversight and fiscal responsibility of ISSP, through three Standing Committees—Strategic Oversight, Budget & Finance, and Governance.


Fabian Sack, President

Fabian Sack, ISSP-CSP, PhD

Board President

Fabian Sack, ISSP-CSP, PhD, has been an Australian thought leader in sustainability over 25 years. He has held senior private and public sector roles in the water, infrastructure and energy sectors. His company Sustainably now works collaboratively with governments, NGOs, higher education and businesses. Fabian’s areas of special interest are skills for sustainability, social and environmental impact reporting methodologies and our society’s resilience in the face of global climate, social and economic change. Fabian holds a PhD in corporate environmental ethics and is an associate of the University of Sydney. Fabian is a Fellow of the Environment Institute of Australia and New Zealand and is also one of the first ISSP-CSPs in Australia. Fabian currently sits on the Total Environment Centre Management Committee and is a member of the Australian National Climate Change Adaptation Research Facility Project Review Committee.

Sarah Lewis, Vice President

Sarah Lewis, ISSP-SA, PhD

Board Vice President

Dr. Sarah E. Lewis, ISSP-SA, is passionate about identifying and working through challenges at the interface of humans and the environment. A leader in the field of sustainability, Sarah is on the Board of Directors of the International Society of Sustainability Professionals, an author on articles related to perceptions of ecological integrity and improving supply chain sustainability, and the Managing Director of Members and Implementation with The Sustainability Consortium (TSC). In her role at TSC she oversees working group and research integration strategy across consumer goods industry sectors. Her work with TSC focuses on directing research projects, developing implementation programs, and managing member relationships in order to drive the development and use of TSC Product Sustainability Toolkits. Sarah holds a Ph.D. in Environmental Dynamics, a Master of Arts in French, and a Bachelor of Science in Biology and French Secondary Education. An award-winning educator, Sarah is an Adjunct Professor of Environmental Sociology and serves on a number of graduate student committees. She is also an active and recognized sustainability leader in her community, having served as an elected official on the Fayetteville, Arkansas City Council, and currently serves as a board member of the Illinois River Watershed Partnership and the Walton Arts Center Council.

Lucinda Brown, Treasurer

Lucinda F. Brown, ISSP-CSP, MBA

Board Treasurer

Lucinda F. Brown, ISSP-CSP, has a special gift for turning broad conceptual strategies into detailed, step-by-step processes that provide a clear roadmap toward sustainability. She brings nearly two decades of experience as a business owner and project manager to her current work. For the past 10 years, her talent for organizing, analyzing, and synthesizing quantitative and qualitative data, has helped executives effectively communicate material information to targeted stakeholders. Serving a broad range of nonprofit and for-profit clients—from SMEs to international conglomerates—her passion lies in bringing top-notch assistance to small start-ups. Trained in The Natural Step framework through the Blekinge Institute of Technology in Sweden, Lucinda is an ISSP-CSP with an MBA from Georgetown, and a BFA in visual communications from Syracuse.

Marsha Willard, Secretary

Marsha Willard, ISSP-CSP, PhD

Board Secretary

Marsha Willard, ISSP-CSP, Ph.D., is founder and CEO of AXIS, a consulting firm founded in 1990. Marsha applies her management consulting, training and facilitation skills to help organizations find responsible solutions that meet all stakeholder needs: owners, customers, employees, the community and the environment. AXIS is recognized for its expertise in the implementation of sustainability. Marsha and her partner have co-authored six popular business books including, The Business Guide to Sustainability and A Step by Step Guide to Sustainability Planning. She is a member of the faculty for the Bainbridge Graduate Institute where she teaches sustainability in business as part of the first year of the MBA program. Marsha is also co-founder and former Executive Director of the International Society of Sustainability Professionals, a professional association serving the practitioners in the fast-growing sustainability arena.

Harry Gordon

Harry Gordon, FAIA, LEED Fellow


Harry Gordon, FAIA, LEED Fellow, is the Vice Chair of GBCI and Chair of the GBCI Finance and Audit Committee. He is also Vice Chair of the USGBC NY Upstate Community Board. He was a member of the inaugural Board of USGBC and was Co-Chair of the USGBC Finance and Audit Committee. He received a Leadership Award from USGBC and was Vice Chair of the LEED Fellows Selection Committee in 2011. He is a LEED AP BD+C and served on the LEED NC Core Committee. He was a founding member of the National AIA Committee On The Environment (COTE) and was Chair in 1995. While a COTE leader, he led the Heating and Cooling Team of the Greening of the White House and his work was commended by President Clinton. He is the inaugural winner of the Greg Franta Memorial Award for High Performance Sustainable Design selected by SBIC (now NIBS). For four decades he has been an innovator in high performance architectural design and research and his projects have won numerous awards including two AIA COTE Top Ten and two Progressive Architecture Research Awards. He has testified before the US Congress on sustainable issues, presented at national conferences of USGBC, AIA, NAHB, ASES, ISES, and ASHRAE, and has lectured at numerous universities.

Sarah Alexander

Sarah Alexander


Sarah Alexander, As senior vice president of Credentialing and Certification at Green Business Certification Inc. (GBCI), Sarah is responsible for the professional credential and certification activities for GBCI’s suite of green business and sustainability products worldwide. GBCI administers credentials and certifications for the U.S. Green Building Council’s LEED certification, the world’s most widely used green building rating system, as well as PEER, the WELL building standard, the Sustainable Sites Initiative (SITES), Parksmart, EDGE, TRUE, City Climate Planner, Investor Confidence Project (ICP) and the GRESB benchmark. Through implementing rigorous credentialing and certification standards, Sarah and her team are dedicated to upholding GBCI’s mission to drive the adoption of green business practices, which fosters global competitiveness and enhances environmental performance and human health benefits.

Jeffrey Yorzyk

Jeffrey Yorzyck, ISSP-CSP


Jeff Yorzyk, ISSP-CSP, specializes in strategic environmental management and stewardship, with a focus on risk and opportunity management across the enterprise and into the supply chain. He has more than 20 years of experience in sustainability across a broad range of sectors, and has held leadership roles in both commercial and consulting companies spanning program development, software solutions, product sustainability and LCA, enterprise asset management and strategic management systems. Jeff believes that "pro bono" service is critical to both the profession and his personal mission to fuse sustainability into organizations. Prior to joining ISSP, he served on the Board of CORE Colorado as Vice President, President and Chair of the Board; and with P3 Colorado as Program Chair, Vice President and President of the Board. Currently the Director of Sustainability for Green Chef, the first USDA-certified organic meal kit delivery service, Jeff is avidly building a world-class sustainability program from the initial leadership position Green Chef has developed in a rapidly growing market. Jeff also spent ten years at Five Winds International, now thinkstep following acquisition in 2010. Jeff appears regularly as a guest lecturer on sustainability, and has delivered courses and workshops on life cycle assessment, management systems, and other sustainability topics. A founding member of the University of Colorado at Boulder Net Impact club, Jeff also founded the CU-Net Impact Case Competition in 2002.