About Green Seal

The Green Seal Team

Green Seal’s staff work cohesively reviewing scientific research for standard development, implementing certification, fostering partnerships, and providing technical assistance to businesses and institutions. Excellent, one-on-one service and a genuine desire to help are ingrained in our culture, along with an unwavering commitment to integrity and transparency. For nearly three decades, we have worked with companies to transform the economy for a healthier, greener world, and we are proud to be seen as the gold standard for ecolabels in North America.


Doug Gatlin   Chief Executive Officer


Doug has spent 25 years in the energy efficiency and sustainability field and is highly experienced in all aspects of the design, deployment and operations of voluntary market transformation programs. Prior to joining Green Seal in 2018, he held leadership positions at the U.S. Green Building Council and EPA. Doug brings strong product management experience, non-profit leadership experience, as well as formal education in economic and policy analysis. He was one of the founding team members of US EPA’s ENERGY STAR Buildings program, and at USGBC launched LEED for Building Operations & Maintenance. Doug holds a B.S. in Political Science from Duke and a M.S. degree in Energy and Environmental Policy from Georgetown. Email: dgatlin@greenseal.org 

Mehreteab Masho  
Chief Financial Officer

Masho joined Green Seal in 1994. He is in charge of all financial and administrative aspects of the organization’s operations. He has over 30 years of experience in diversified accounting, budgeting, and financial forecasting. Prior to joining Green Seal, Masho held various accounting positions, including controller with Inter Systems Inc., a high-tech government contracting firm. Masho received his M.B.A. from the University of the District of Columbia. Email: mmasho@greenseal.org


Mark Stanland   Vice President of Client Services

Mark has over 25 years of experience in marketing and product development, and leads Green Seal’s new Client Services Program.  The Client Services Program is designed to provide tailored marketing support and strategic direction for manufacturers and service providers with, or working toward, Green Seal certifications.  Prior to joining Green Seal in January 2015, Mark led the development of Wausau Paper’s Green Seal program and green platform. He holds an M.B.A from Syracuse University and a bachelor’s degree from the University of North Carolina at Chapel Hill.
Email: mstanland@greenseal.org

Mary B. Swanson   Vice President of Certification


Mary directs Green Seal's certification program and serves as the technical lead for product certifications. She has 30 years of experience in environmental research and consulting, with a focus on evaluating the fate and effects of chemicals released to the environment, developing tools for evaluating cleaner products and cleaner technologies, and hazardous waste site remediation. Prior to joining Green Seal in 2006, Mary worked as a research scientist with the University of Tennessee’s Center for Clean Products and Clean Technologies. She has an M.S. degree in environmental engineering from the University of Minnesota and a B.S. degree in natural resources/water chemistry from the University of Wisconsin-Stevens Point. In her spare time, she enjoys gardening, artwork, and long walks in the woods. Email: mswanson@greenseal.org

Cerise Bridges  
Certification Specialist II

Cerise joined Green Seal in 2009 as an intern with an interest in combining her education and work experiences in hospitality management and environmental policy. She became a staff member in 2010. She provides assistance and expertise to clients pursuing certification of Green Seal’s service-related standards. Originally from the Chicago area, Cerise has spent her adult life in Washington, D.C., where she earned a B.B.A. from Howard University and an M.A. in environmental policy from American University.

Email: cbridges@greenseal.org

Holly Cypress
   Office Administrator

Joining Green Seal in 2015, Holly has a B.S. in Business with a marketing major from the University of Maryland.  She has over 15 years of business and marketing experience in a variety of positions from account executive to corporate advertising manager. As a member of the Green Seal team, Holly looks forward to supporting our mission to help create a more sustainable environment. Email: hcypress@greenseal.org

Kat Danaher
  Senior Executive Assistant to CEO
                          Marketing & Communications Leader

Kat, a Virginia native, graduated from the University of North Carolina at Chapel Hill with a B.A. in communication studies and proficiency in French and Italian. Her professional experience includes over fourteen years of CEO-level executive support, as well as marketing & communications management and event planning. She fosters dogs for DC-based City Dogs Rescue, and enjoys travel, the outdoors, and eating delicious things with friends & family. Kat joined Green Seal in 2011.  Email: kdanaher@greenseal.org

Sean Foltz   Environmental Scientist

Sean joined Green Seal in 2017 as part of the Certification team. Previously he worked for American Rivers where he had been the lead project manager on multiple green infrastructure projects throughout Wisconsin’s watersheds. He was also an environmental consultant where he led surveys and testing for clients as diverse as Coca-Cola Global and Unilever, to stay in compliance with the environmental regulations that impact their operations. He also lived in the Kingdom of Tonga as a U.S. Peace Corps Volunteer. Sean spends his free time exploring Wisconsin’s natural areas with his wife and three children, and competing in 5ks.
  Email: sfoltz@greenseal.org

Nina Hwang
   Environmental Scientist 

Nina joined Green Seal in 2016 as an environmental scientist to work on product certification. Originally from California, she slowly moved east to earn a Bachelor of Science in Chemistry and Environmental Engineering from Rice University, followed by a Master of Public Health in Global Environmental Health from the George Washington University. Nina previously worked to protect the environment and public health at NRDC and the EPA. She spends her free time backpacking, baking, and exploring the nation’s capital. Email: nhwang@greenseal.org

Nathan Kloczko
   Environmental Scientist 

Nathan joined Green Seal in 2016 as part of the Certification team. Previously, he worked with the Southwest Pennsylvania Environmental Health Project to study how unconventional natural gas development impacts the health of communities and the environment. He graduated from Middlebury College with degrees in molecular biology and music, and earned a Master of Public Health from Yale University, concentrating in Environmental Health Sciences. Outside of Green Seal, Nathan enjoys singing in choirs, playing ultimate frisbee, and baking. Email: nkloczko@greenseal.org

Stacey Koch
  Principal Environmental Engineer

Stacey has been working with Green Seal since 2007, and her duties have included managing certification projects and developing standards. Prior to joining Green Seal, she was a lead environmental engineer with RMT, Inc. for 12 years, where she specialized in environmental design and management of projects, including industrial wastewater treatment, soil and groundwater remediation, surface water contaminant fate and transport, and sediment remediation. She holds a Master of Science in civil and environmental engineering from the University of Washington and a Bachelor of Science in civil and environmental engineering from the University of Wisconsin-Madison. She also maintains her Professional Engineer license in the State of Wisconsin. Her personal interests include reading, hiking, golfing, canoeing, and gardening. Email: skoch@greenseal.org

Brittany Maule  
Certification Coordinator

Brittany joined Green Seal in 2018 as part of the Certification Team. Previously, she worked for the Indiana Department of Environmental Management in their Drinking Water Branch where she developed outreach projects and reviewed technical plans to improve drinking water sources across the state. She graduated from the University of Wisconsin-La Crosse with her Bachelor of Science in Biology: Environmental Science with minors in Professional and Technical Writing and Spanish, followed by an M.S. in Biology from Ball State University. In her free time, Brittany enjoys hiking, reading, and spending time with her family. Email: bmaule@greenseal.org

Huong Pineda  Outreach & Client Services Coordinator


Huong joined Green Seal in 2017 as an Outreach & Client Services Coordinator. She was born in Vietnam and raised in California. She completed her B.S in Biological Science with a minor in Education at the University of California, Davis. Prior to joining Green Seal, she spent four years in environmental consulting supporting the Environmental Protection Agency’s effort in bioremediation projects and feasibility studies to remove contaminants from Superfund site, Sulphur Bank Mercury Mine. Huong enjoys reading, painting, and going on food adventures with her family to find creative cuisines. Email: hpineda@greenseal.org

Terry Ross  
Special Projects/Quality Coordinator

Terry joined Green Seal in 2016 and is part of the Certification team. She has been involved in climate change and sustainability education for many years and most recently worked on the University of Wisconsin-Madison’s Massive Open Online Courses and Science Narratives projects. She created the Sustainable Business Certificate program at Madison College and is a former librarian. Terry also directs the Wisconsin state BiketotheLibrary.org program which combines two crowning human achievements: bikes and books! Email: tross@greenseal.org

Anne Shudy Palmer  
Senior Environmental Scientist

Anne manages certification projects, as well as works with retail companies and hospitality businesses to help them become more sustainable. She joined Green Seal in 2009 and previously coordinated the Sustainability Leadership Graduate Program at Edgewood College, wrote sustainability case studies and reports for several Wisconsin organizations, and worked with Madison's utility company to create a locally focused carbon footprinting website. Anne has an M.S. in sustainability and a B.S. in math and film, both from the University of Wisconsin-Madison, and is a LEED Accredited Professional. She enjoys reading, writing, playing soccer, and generally getting outside. Email: aspalmer@greenseal.org

Callie Taylor   Certification Leader

Callie joined the Green Seal team in 2013.  Callie coordinates the certification evaluation and monitoring process and works with clients to ensure continued compliance with the Green Seal standards. Prior to working with Green Seal, Callie was the Program Coordinator with ToxServices, where her primary responsibility was to manage client evaluations for DfE (now Safer Choice) recognition and CleanGredients. She graduated with a B.S. in Marine Biology and Environmental Science from the University of North Carolina Wilmington. She enjoys reading, being outside, southern food, long walks on the beach, and hanging out with her family.  Email: ctaylor@greenseal.org

Brielle H. Welzer   Environmental Scientist

Brie joined Green Seal in 2012. She supports the development of new standards, manages the revisions of issued standards, conducts sustainability analyses, and leads science communications initiatives. Prior to joining Green Seal, Brie provided mission and research support to the U.S. Environmental Protection Agency (EPA), and managed innovative programs in partnership with the American Association for the Advancement of Science (AAAS). She graduated with a B.S. in Environmental Science and Geochemistry from the University of Rochester, and has an M.B.A. in Sustainable Business. Email: bwelzer@greenseal.org

Some photography contributed by Laura Burt, www.burtla.smugmug.com