Part of the Clean Production Action team since 2004, Mark has the unique ability to bring together diverse groups and achieve innovative outcomes. In 2006, he founded BizNGO, a collaboration of organizations who work together to advance safer chemicals and sustainable materials. BizNGO's listserv now reaches over 1,300 business, health care, government, university, and environmental leaders. Innovative products of BizNGO include the Alternatives Assessment Protocol, Guide to Safer Chemicals, and Plastics Scorecard. Mark is also the co-author of the GreenScreen. Launched in 2007, the GreenScreen is now the gold standard in hazard assessment tools. In 2014, he co-founded Clean Production Action, the first initiative of its kind to benchmark corporations on their overall chemical management performance.

Mark is the author and co-author of numerous articles, reports, and blogs on advancing safer alternatives to toxic chemicals. Most recently, he authored the United Nations Environment Program's report, The Business Case for Knowing Chemicals in Products and Supply Chains. Mark is a member of the Massachusetts Toxics Use Reduction Act Advisory Committee and is a Research Fellow at the Lowell Center for Sustainable Production. He received an Environmental Merit Award from the U.S. Environmental Protection Agency Region 1 on behalf of BizNGO's leadership work on Green Chemistry. Mark's career includes stints at Tellus Institute, the Toxics Use Reduction Institute, and Health Care Without Harm. His doctorate is in Environmental Policy from the Massachusetts Institute of Technology.