Baykeeper Staff

Sejal Choksi-Chugh, Executive Director and Baykeeper
(510) 735-9700 x 107
Sejal provides strategic direction and leadership for our high-impact programs and operations to protect San Francisco Bay. Since joining the team in 2002 as an Equal Justice Works legal fellow, Sejal served in several capacities including Program Director, spearheading the charge to reduce pesticides pollution, industrial runoff, mercury contamination, and sewage and oil spills in the Bay. As the Baykeeper, she provides water policy advice to the Waterkeeper Alliance, the world's fastest-growing movement of grassroots organizations protecting clean water. In 2015 Sejal was honored with the UC Berkeley Ecology Law Quarterly's Environmental Leadership Award. And in 2020 she was recognized as a Local Conservation Action Hero by Bay Nature magazine. Sejal holds a J.D. with a specialization in Environmental Law from UC Berkeley. She graduated summa cum laude as a Robert W. Woodruff Scholar from Emory University with a B.S. in Anthropology and Human Biology.

Eric Buescher

Eric Buescher, Senior Staff Attorney
(510) 735-9700 x106
Eric is Baykeeper's senior attorney responsible for implementing our cutting-edge litigation strategy and supervising our team of legal experts. He joined Baykeeper with over ten years of experience as an attorney at the law firm of Cotchett, Pitre, and McCarthy, where he focused on plaintiff-side fraud and elder abuse litigation, as well as key environmental matters involving land use, water, and the public trust. Eric was the lead attorney on the groundbreaking Martin's Beach public access case representing Surfrider Foundation, and also a lead attorney representing our environmental partners on San Francisco Baykeeper vs. U.S. EPA to protect the Redwood City Salt ponds from development. He received his J.D. from Georgetown University after graduating from Duke University with a B.A. in Political Science.

Ben Eichenberg, Staff Attorney
510-735-9700 x 105
Ben is one of Baykeeper’s primary enforcement attorneys, responsible for prosecuting our active docket of high-impact water quality cases through research, litigation, and settlement negotiations. He joined Baykeeper in 2016 after several years in private practice at the Environmental Law Offices of Stephan C. Volker, representing environmental and community groups in civil litigation to protect endangered environmental resources. Ben received his J.D. from University of California Hastings College of the Law in 2009. While at Hastings, he also gained experience at the San Francisco City Attorney’s Office and the Stanford Environmental Law Clinic. After law school, Ben was a Fulbright Scholar in Oslo, Norway, where he studied climate change regulation and received a master’s degree in Public International Law from the University of Oslo. Ben obtained his BA from Lewis & Clark College in Portland, Oregon, where he double majored in philosophy and psychology.


Nicole Sasaki, Staff Attorney
(510) 735-9700 x 110
Nicole is one of Baykeeper's primary enforcement attorneys, responsible for prosecuting citizen suits through legal research, analysis and field investigation of pollution sources.  She also monitors polluter compliance with Baykeeper’s active Clean Water Act enforcement program. She joined Baykeeper in 2014 after graduating magna cum laude from Pace University School of Law. While in law school, Nicole gained practical experience at the Pace Environmental Litigation Clinic where she represented Hudson Riverkeeper, New York/New Jersey Baykeeper, and Waterkeeper Alliance. She also served as a law clerk for Hudson Riverkeeper and Earthjustice. Her work focused on protecting water quality in the New York City watershed and defending New York City public parkland under the Public Trust Doctrine. Nicole holds a B.A. in History and Political Science from UC Berkeley and a J.D. from Pace University School of Law with a Certificate in Environmental Law.

Jon Rosenfield, Senior Scientist
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Jon serves as Baykeeper's lead scientist responsible for integrating the best available science into Baykeeper policy positions and legal arguments to protect San Francisco Bay. Prior to joining Baykeeper, Jon worked for over 10 years protecting the Bay's endangered fishes and commercial fisheries as a conservation biologist with The Bay Institute. Jon has conducted scientific research and translated science for attorneys, policymakers, and the public since the early 1990s, when he first encountered San Francisco Bay and its watershed as a research associate for the Sierra Club Legal Defense Fund (now Earthjustice). Jon earned his Ph.D. in biology from the University of New Mexico. He also holds a B.S. in Natural Resource Ecology from Cornell University and an M.S. in Resource Management and Conservation Biology from the University of Michigan.


Ian Wren, Staff Scientist
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Ian provides technical hydrology services on Baykeeper's enforcement actions and regularly represents Baykeeper before regulators, municipalities, and technical committees. He serves as the Environmental Representative on the Technical Review Committee of the San Francisco Estuary Institute. Prior to joining Baykeeper in 2010, Ian spent six years in environmental consultancy as a Habitat Restoration Specialist in Southern California and a Hydrologist in London, UK. Ian has worked with a range of public, private and non-profit organizations in California, Europe and the Middle East and is experienced in issues surrounding urban water quality, coastal diffuse pollution, endangered species, wetland restoration and the use of low impact technologies to mitigate water quality impacts and flood risk. He studied biology and ecology at UC Berkeley, holds an M.S. in Hydrology and Sustainable Development from Imperial College, London and is a Certified Professional in Stormwater Quality (CPSWQ)/Qualified SWPPP Developer (QSD).

Cole Burchiel, Field Investigator and Science Associate
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Cole supports our science team and leads Baykeeper’s pollution investigations by coordinating our boat and drone patrols, responding to Pollution Hotline reports, and strategic water quality testing. He manages our Baykeeper boat program and our volunteer skippers to investigate Bay pollution. He also serves as Baykeeper's point on vessel pollution advocacy, acting as our liaison to the Bay Area recreational and boater community, oil spill response agencies, and community activists. He works directly with Bay Area communities leading shoreline cleanups and coordinating volunteers to inspire stewardship around the Bay. Prior to joining Baykeeper, Cole conducted scientific research in a variety of fields, including agricultural watershed runoff and explosive silicic volcanism. He is NREMT certified and holds degrees in Geology and Environmental Studies from Oberlin College.


Eliet Henderson, Development Director
(510) 735-9700 x 101
Eliet Henderson directs Baykeeper's development and communication efforts, managing supporter outreach, funder relationships, online communications, publications, and events. She first joined Baykeeper in 2007. She previously worked in communications on a statewide initiative campaign and as an events coordinator and program assistant at Equal Justice Works in Washington, D.C. She graduated from The University of Texas at Austin with a B.S. in sociology.


Mark Westlund, Communications Director
(510) 735-9700 x 111
Mark oversees Baykeeper’s communications work, from campaign updates to information strategy. He joined Baykeeper in 2020 after being part of teams at the Sierra Club, Rainforest Action Network, and San Francisco’s Department of the Environment that helped convince President Obama to say no to the Keystone XL pipeline, Home Depot to stop selling old growth wood, and made the nation’s first ban on plastic shopping bags a reality. A California native and longtime Bay Area resident, Mark graduated from UC Berkeley with honors in English. When he’s not here protecting the Bay, you can find Mark looking for clapper rails at Arrowhead Marsh, or up in the Sierra foothills hunting mushrooms and splitting wood.


Fiona BakerFiona Baker, Communications Manager
(510) 735-9700 x 104
Fiona creates content for Baykeeper’s website, e-newsletter, social media, print materials, and other communications to showcase Baykeeper’s achievements protecting San Francisco Bay. She joined Baykeeper after working as an information officer for the US Agency for International Development’s humanitarian and disaster response office in Washington, D.C. Fiona holds a B.A. in Literature from UC Berkeley and an M.A. in International Policy from Middlebury College.


Lea PfefferLéa Pfeffer, Development Manager
(510) 735-9700 x 112
Léa supports Baykeeper's development efforts, coordinates event production, and manages the organization's database. Prior to joining Baykeeper, Léa worked for non-profits both in Grand-Bois, Haiti and in Quito, Ecuador. Her interest in environmental work guided her master’s thesis where she analyzed the spheres of decision making within climate change negotiations. She conducted her field work by participating at the COP 21 (Conference of the Parties) in Paris and was published for a policy paper that evaluated the participation of the Gulf Cooperation Council at the COP 21. She holds a B.A. in Political Science from UCLA and an M.A. in International Relations from the Paris Institute of Political Studies.