OUR TEAM
GLSI Staff Leadership
Caleb Carlton
President & CEO
Bio
Caleb grew up in mid-Michigan, where he developed an enduring connection to his home state and the Great Lakes ecosystems. This connection has informed and inspired his work and life ever since, and he is deeply grateful to be working with GLSI in service to Michigan’s communities and environment. Caleb earned a bachelor’s degree in Environmental Studies and Applications from Michigan State University and, much later, a master’s degree in Environmental Geoscience from Mississippi State University.
After his undergraduate years at MSU, Caleb spent two years as a residential environmental educator with the Inside the Outdoors Foundation in the San Bernardino Mountains of Southern California. He then began an 11-year tenure with Tremont Institute, a residential environmental learning center located within Great Smoky Mountains National Park. During this time, Caleb focused on developing school and community pathways of place-based education experiences for youth that connected across grade levels, schools, and places–from the schoolyard, to the backyard, to Great Smoky Mountains National Park. Caleb also developed multi-touchpoint place-based professional development programs for educators and pre-service education students, in partnership with the University of Tennessee and Great Smoky Mountains National Park.
Caleb later transitioned into nonprofit leadership while serving as the Director of the Smokies to Schoolyards Initiative, and later as the Development Director for Tremont Institute. Most recently, Caleb served a 2-year term as the Executive Director of Young Voices for the Planet, a national youth-based environmental storytelling and mentorship organization.
Lisa Marckini
Program Evaluator & Administrative Specialist
Bio
Lisa Marckini-Polk earned bachelor’s and master’s degrees in political science from Wayne State University. While pursuing a Ph.D. in public policy at Wayne State, she participated in research efforts focused on the impact of term limitation on the Michigan Legislature and on shifts in the representation of central cities in the U. S. Congress. She was employed by Public Policy Associates, Inc. between 1999 and 2003, where she worked on research and evaluation efforts related to natural resources, small business development, workforce development, education, customer service in the public sector, and land use.
Marckini-Polk established Civic Research Services, Inc. in January 2004. Since then, she has worked on numerous evaluations and program-development efforts with the environment as a common theme. Since 2007, she has managed the evaluation of the Great Lakes Stewardship Initiative. She has expertise in an array of evaluation strategies as well as data management, data visualization and analysis, and facilitation skills. Since 2018, she has additionally contributed to the GLSI’s business and financial planning and to development of new services.

Patty Tolly
Director of Programs & Educator Networks
Bio
Patty Tolly joined the GLSI team following an exceptional 30-year career as a teacher with Forest Hills Public Schools in metro Grand Rapids, Michigan. As a classroom teacher, Patty constantly pursued opportunities to increase the relevance and meaning of learning objectives for her students through place-based, student-led projects and experiences, such as by developing a podcast to raise awareness about non-point source pollution, working with local representatives to draft a state bill aimed to reduce car idling, and developing native gardens on the school campus.
For 15 years, Patty worked closely with Groundswell Stewardship Initiative, the GLSI Hub serving Kent and Ottawa Counties in Michigan. She was honored as the 2022 Ground “Swell” teacher of the year, and recently served as co-chair of Groundswell’s Teacher Leadership Committee. In 2023, Patty was selected as a fellow of the North American Association for Environmental Education’s Civic and Environmental Change Fellowship program, which connects education leaders and innovators from across the planet during an immersive leadership development and peer networking program. Additional past education leadership roles that Patty has held include Teacher Ambassador with Kent Intermediate School District Design Thinking Academy, and as a futurePREP’d IChallengeUth teacher. Patty holds a B.S. in elementary education from Western Michigan University and an M.S. in Educational Leadership, also from WMU.

Katie See
PBE Specialist & Leadership Coach
Bio
Katie earned her BA in elementary education and her MS in educational leadership from Michigan State University. She started her teaching career in the East Lansing Public Schools working at an MSU Professional Development School. This experience helped her to learn the power of teacher collaboration, school-community partnerships and sustained professional development. She relocated and continued her career as a classroom teacher in the Dexter Community Schools. Inquiry, project-based learning and connecting with community experts were at the forefront of her teaching. She served as an IB Coordinator in Dexter and was a member of the Washtenaw ISD mathematics and science inquiry cohort.
After 24 years of teaching, Katie became a principal at Wylie Elementary in Dexter. Her relationship with GLSI started when two Wylie teachers and a district coach partnered with the Southeast Michigan Stewardship Coalition, embracing place-based education. The teaching and learning that was happening in their classrooms was transformative. Students were inspired and excited to learn, collaborate and take action in their communities. During this time, Katie focused on how she could leverage her leadership to support and grow PBE. She created a teacher leadership team, planned and co-led professional development and developed systems to foster place-based education. In a few years, with ongoing support from the Southeast Michigan Stewardship Coalition, place-based education became a school-wide approach to teaching and learning at Wylie. In 2025, Katie was grateful to be honored with the SEMIS Coalition Legacy Award and after 35 years in education, she retired.
Katie is thrilled to be joining the GLSI Team where she can continue to support Michigan educators on their journey to deepen their place-based education practice and transform teaching and learning.

Jan Sneddon
Administrative Associate & Conference Organizer
Bio
Jan’s relationship with the GLSI began in 2012, when she worked for Earth Force as the Director for the Center for National Partnerships and the GM GREEN program. She worked with the GLSI hubs in Muskegon, Ypsilanti, and Houghton to integrate the Earth Force 6-step environmental action civics process into their PBE strategies. This strengthened an already deep love for Michigan and the Great Lakes, and cultivated a deep appreciation for place, and she moved to Kalamazoo in 2015.
She joined the GLSI team in 2017 as the organizer of the GLSI’s 6th Place-Based Education Conference and added administrative support responsibilities in 2018.
Jan earned her Bachelor of Science from Appalachian State University and her Master of Environmental Science degree from Indiana University’s School of Public and Environmental Affairs. Much of her professional career has centered on environmental and watershed protection—from her roles as an educator with the Sound to Sea residential environmental education program on the Outer Banks of North Carolina, to limnology assistant with the Indiana Clean Lakes Program, to Volunteer Coordinator for the Indiana DNR’s Hoosier Riverwatch program, to program manager and then director of Earth Force’s GM GREEN program.
In her free time, Jan enjoys kayaking, hiking, and searching for macroinvertebrates on rocks in lakes and streams with her husband and two kids.
GLSI Hub Network Staff Leadership

Leyla Sanker, Director
Discovering PLACE

Clay Pelon, Director
Groundswell Stewardship Initiative

Carla Strome, Director
Lake Superior Stewardship Initiative

Meag Schwartz, Network Coordinator
Northeast Michigan Great Lakes Stewardship Initiative

Anna Balzer, Director
Southeast Michigan Stewardship Coalition

Erica Johnson, Director
West Michigan Great Lakes Stewardship Initiative
GLSI Board of Directors
Board Chair
Ellen Brody
Bio
Ellen Brody recently retired as the Great Lakes Regional Coordinator for the NOAA Office of National Marine Sanctuaries.
Vice Chair
Dr. Gregory Smith
Bio
Gregory A. Smith is emeritus professor of education from the Lewis & Clark College Graduate School of Education and Counseling in Portland, Oregon.
Treasurer

Erica Johnson
Bio
Since 2013, Erica Johnson has been the place-based education specialist for the Muskegon Area Intermediate School District (MAISD) and is the current hub leader for the West Michigan Great Lakes Stewardship Initiative.
Secretary
Brandon Schroeder
Bio
Brandon Schroeder is part of the Northeast Michigan Great Lakes Stewardship leadership team and a Senior Extension Educator with Michigan State University Extension and Michigan Sea Grant.
Director

Stephanie Chang
Bio
Stephanie Chang currently serves out of Detroit as a state senator in the Michigan Senate.
Director
Julia Putnam
Bio
Julia Putnam is a co-founders and principal of the Boggs School, a K–8 school located in Detroit, Michigan.
Director
Dr. Suzanne Knight
Bio
Dr. Suzanne Knight is the Associate Director of Academic Programs and an Associate Professor of Education in the College of Arts, Sciences, and Education at the University of Michigan-Flint.
Director
Todd Ambs
Bio
Todd Ambs retired from the Wisconsin Department of Natural Resources at the end of 2021 as Deputy Secretary. Todd served in state agencies in Wisconsin and Ohio during his career, spanning more than four decades.
Director
Clay Pelon
Bio
Clay Pelon is the Director of the Center for Educational Partnerships in the College of Education and Community Innovation at Grand Valley State University. He is also the Director for the Groundswell Stewardship Initiative, the GLSI hub in Grand Rapids, Michigan.
Director

Lloyd Wescoat
Bio
Lloyd Wescoat is retired from Michigan Technological University, and she continues to serve on the Lake Superior Stewardship Initiative (GLSI Hub for the Western Upper Peninsula of Michigan) leadership team.
Director

Anna Balzer
Bio
Anna Balzer serves as Director of the Southeast Michigan Stewardship Coalition (SEMIS), a GLSI Hubs in Southeast Michigan based out of Eastern Michigan University.
Join the Board

Becoming a GLSI Director
GLSI is actively accepting inquiries for two new director at-large seats during a strategic expansion of the Board of Directors. Submit your interest in joining the board here.
Board Chair Emeritus
Dr. Ethan Lowenstein
Bio
Dr. Ethan Lowenstein (pronouns: He/his), is a Professer of Curriculum and Instruction at Eastern Michigan University. Ethan is the former Director of the SEMIS Coalition—a GLSI hub in Southeast Michigan.

Mary Whitmore
Executive Director Emeritus
Bio
In 2006, at the invitation of the Great Lakes Fishery Trust (GLFT), Mary Whitmore spent a year working with others in Michigan and beyond to develop the concept of the Great Lakes Stewardship Initiative. She has served as the initiative’s coordinator under GLFT from 2007-2017, and as GLSI’s founding executive director from 2017 until her retirement in 2023. Upon her retirement, Mary was recognized for her leadership and impact with GLSI and previous roles by receiving the 2024 William Stapp Award, the Michigan Alliance for Enviornmental and Outdoor Education’s highest honor in environmental education. Mary was also honored with the 2024 George C. Mallison Award from the Michigan Science Teachers Association.
Mary earned her bachelor’s degree in wildlife biology at Michigan State University. A Rotary International Graduate Fellowship allowed her to study for one year at the University of Queensland in Brisbane, Australia. With support from a series of university postgraduate research fellowships and a research award from the American Museum of Natural History, she remained in Australia, where she conducted field research and obtained a doctoral degree in zoology.
Returning home, Whitmore spent ten years as the Resident Ecologist at the University of Michigan Biological Station. There, she expanded her interests to include K–12 and citizen science education, and launched a successful and popular outreach program to make the Station’s facilities and resources more accessible to people in northern Michigan’s rural schools and communities. She helped establish the Michigan Mathematics and Science Centers Program, and served as the director of one such center for nearly two decades. She was also the Co-Coordinator for Professional Development for the Michigan Statewide Systemic Initiative, and a program officer in the W.K. Kellogg Foundation’s science education program.








