FLOW Staff


Liz Kirkwood, Executive Director

Liz Kirkwood, Executive Director

As executive director, Liz Kirkwood oversees FLOW’s policy, legal, technical and communications work. After working as an environmental lawyer in both the U.S. and overseas, she has returned to the nonprofit sector because she is mission-driven and passionate about protecting the Great Lakes. Read more here.

What connected you to the Great Lakes: The magic of the Great Lakes lured me to permanently move here after years of summering along the shores of Crystal Lake and Lake Michigan.  

Favorite place in Michigan: This is it. This whole region of northern lower Michigan is my favorite place. I just am angling for more time to explore and adventure with friends and family.

Fun fact: I still dream of being a photographer. I spent most of high school in a photo lab developing silver gelatin photographs.

Read more about Liz Kirkwood here: Liz Kirkwood, Executive Director of FLOW, is Our Great Lakes Guardian | MyNorth.com | Aug. 22, 2019. And listen here: Elizabeth Kirkwood on Fulfillament | Nov. 12, 2018.

Dave Dempsey, Senior Advisor

Dave Dempsey, Senior Advisor

Dave Dempsey has 35 years' experience in environmental policy. He served as environmental advisor to former Michigan Governor James Blanchard and as policy advisor on the staff of the International Joint Commission. He has also provided policy support to the Michigan Environmental Council and Clean Water Action. He has authored several books on the Great Lakes and water protection. Read more here.

Favorite Great Lakes activity: Watching sunrise from southern Lake Huron.

Favorite Great Lakes book: Freshwater: Women Writing on the Great Lakes, edited by Alison Swan.

Favorite Great Lakes fact: It takes 173 years for nature to replenish all the water in Lake Superior.

How Supporters Can Energize FLOW's Next 10 Years: Donate to the Olson-Dempsey Fund.

Tessa Diem, Development Specialist

Tessa Diem, Development Specialist

As Development Specialist, Tessa Diem works to strengthen FLOW's relationships with and support from the philanthropic community and business partners. Tessa has worked in the nonprofit sector since 2014, serving environmental and cultural organizations to advance their missions through program coordination, strategic planning, resource development and communications. Read more here.

What connected you to the Great LakesGrowing up camping on the shores of Lake Michigan. Every day the lake offered a different personality, sometimes calm, even placid, other days exerting its power. I learned to observe and listen to nature and the Lake was such a good teacher for that.

Favorite place in Michigan: Anywhere I can connect with our geologic history—hiking along the glacial moraines, on the beaches nestled under ancient dunes or along the crisp, clear waters of a spring-fed creek. So many special places to feel a connection.

Favorite Great Lakes fact: Only one percent of the water in the Great Lakes system is replenished each year. The rest is the legacy of glaciers. In other words, the Great Lakes are a finite resource that must be protected!

Read more about Tessa Diem here: FLOW Welcomes Development Specialist Tessa Diem, February 7, 2022.

Diane Dupuis, Development Director

Diane Dupuis, Development Director

Diane Dupuis works to connect FLOW with resources that can help fuel the work of safeguarding the Great Lakes for all.  Read more here.

What connected you to the Great Lakes: I grew up breathing the scent of big fresh water, listening to Great Lakes freighters salute one another in passage, and playing on shores from Oscoda to Paradise and Ipperwash to Naubinway. Now I am happiest when I'm paddling, whether it's on Lake Dubonnet, along the Huron River, or among the Apostle Islands.

Favorite place in Michigan: Esch Beach, in all seasons.

Fun fact: To mark certain sentimental milestones, our family has made a point of swimming together in all five Great Lakes in deliberate succession.

Read more about Diane Dupuis: Make It Rain -- Diane Dupuis Is Here to Help Us Fund the Fight of the Great Lakes' Life | Nov. 16, 2019 | Northern Express.

Jim Olson, Founder and Senior Legal Advisor

Jim Olson, Founder and Senior Legal Advisor

Jim Olson has nearly 50 years of experience as an environmental, water, and public interest law advocate and champion, dedicated to protecting waters and ecosystems in the Great Lakes Basin. Jim currently contributes to FLOW’s legal and policy work, including policy analyses, law review articles, comments, reports, and other publications. He also speaks on behalf of the organization through presentations, lectures, and panel discussions. Read more here.

What connected you to the Great Lakes: Polling a home-made raft with my brothers up and down the shore of the East Arm of Grand Traverse Bay. I was fortunate that my parents moved their family—two girls, three boys—to Traverse City, by the time I was 5 years old we lived on the Bay, so, we grew up in and on the bay, felt its cold and warm temperatures, sensed its sweetwater smell, moods, its seasons and cycles, seches’ that flooded the beach, tore out docks, flipped over moored boats, ice skating, fishing, watersports, dressing up like pirates and pushing each other off row boats into the water.

Favorite place in Michigan: There are so many places that are “favorites,” it’s hard to say—Michigan’s beauty is soft, gentle, rough, rugged, and diverse from the ends of both peninsulas to the other ends. A few places-- Cathead Point, Lake Michigan’s Dunes, and vistas from the worn down mountains, cliffs and beaches that rim Marquette and Lake Superior.

Favorite Great Lakes fact: The distance from the border of southeastern Michigan to Ironwood and Michigan's border with Wisconsin in the Upper Peninsula is almost 650 miles--an 11-hour drive! Perhaps, longer than any distance within any state in the lower forty-eight! With lots of shoreline, rivers, lakes, creeks, wetlands, wildlife, pastures, farms, hills, and ridges, Great Lakes shoreline all the way.

How Supporters Can Energize FLOW's Next 10 Years: Donate to the Olson-Dempsey Fund.

Kelly Thayer, Deputy Director

Kelly Thayer, Deputy Director

Kelly Thayer plays a lead role in strategic communications and overall program development and implementation. Kelly is a wonderful communicator, researcher, and community organizer. His leadership has enabled him to work successfully on a diverse array of local, state, and national environmental campaigns. Read more here.

What connected you to the Great Lakes: My wife, who grew up near Lake Michigan.

Favorite place in Michigan: Any place in Michigan where land meets water. There’s so much beauty here! My family and I highly recommend camping in the Western Upper Peninsula’s Porcupine Mountains.

Favorite Great Lakes fact: Half of all Michiganders, from Marquette to Mackinac Island to the Motor City, rely on the Great Lakes for drinking water, as do more than 48 million Americans and Canadians in total.

Read more about Kelly Thayer here: A Warm Welcome to Our New Deputy Director, Kelly Thayer | FLOW | Oct. 2, 2018.

Zach Welcker, Legal Director

Zach Welcker, Legal Director

Before joining FLOW, Zach Welcker spent more than a decade representing Indian tribes in the Pacific Northwest on water, fisheries, and other natural resource issues.  He was an associate attorney at Kanji & Katzen, PLLC from 2009-2012 and worked as a legal and policy advisor for the Kalispel Tribe of Indians from 2012-2021.

Zach began his legal career as a law clerk for the Honorable Procter Hug, Jr. with the U.S. Court of Appeals for the Ninth Circuit.  He graduated from the University of Oregon School of Law.

What connected you to the Great Lakes: My childhood, my people, da Bears, and the water.

Favorite place in Michigan: This week, a beach in Suttons Bay.

What's a fun fact about you: Both of my kids were born in the water.

Read more about Zach Welcker here: Jim Olson Passes the Torch to Zach Welcker, FLOW’s First Full-Time Legal Director | FLOW | Dec. 9, 2021.

Jacob Wheeler, Communications Coordinator

Jacob Wheeler, Communications Coordinator

As part-time Communications Coordinator, Jacob Wheeler helps to plan and produce FLOW's electronic and print communications for all audiences, including supporters, prospective donors, officials, and the general public. A journalist, Jacob seeks out stories that show the positive impact FLOW has on our communities and our water. Read more here.

What connected you to the Great Lakes: I grew up in Leelanau County near the shores of Lake Michigan. I have lived on three different continents but have always had a sixth sense for where I stand in relation to the nearest body of water.

Favorite place in Michigan: An undisclosed location in the Sleeping Bear Dunes National Lakeshore, where I swim, play, and submerge my toes in sugary sand.

Fun fact: My favorite months to swim in Lake Michigan are November or April, when I have the water to myself.