Newsroom & Media Kit

Kate Williams

CEO

Kate Williams is CEO of 1% for the Planet, a global movement that inspires action and commitment so our planet and future generations thrive. In more than a decade of leadership, Kate has scaled 1% for the Planet’s impact to more than $820 million in certified giving to environmental solutions. A dedicated changemaker, Kate was a 2025 MO 100 Top Impact CEO and 2025 Real Leaders Top Keynote Speaker, and received Chief’s 2024 New Era of Leadership Award. She’s also a mom to two grown children and an avid trail runner, living in Vermont with her husband and their dog. Book Kate for your next speaking event at katewilliams.org.Kate Williams is CEO of 1% for the Planet, a global movement that inspires action and commitment so that our planet and future generations thrive. 1% for the Planet’s global network of thousands of businesses and individuals have donated $100s of millions to environmental partners to date. Kate has led significant growth in the community’s scale and impact, as well as deep work on best practices for implementing high impact giving strategies, growing a network brand and operating as a thriving workplace with an incredible staff team. Kate earned a BA at Princeton University and an MS at the MIT Sloan School of Management, and has served on a variety of Boards throughout her career. Kate is Mom to two amazing young adults, 30-year partner with her husband, and is a trail runner, hiker with her dog and kitchen gardener.

Download hi-res headshots for Kate here.

Kate Williams on LinkedIn

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Allyson Bartlett

VP, Brand and Marketing

Allyson is the VP of Brand & Marketing and has been at 1% for the Planet since 2018 building an in-house team, growing the global brand and driving record scale and impact. Before 1%, Allyson worked in communications & brand strategy at Blue Cross and Blue Shield of Vermont, earning her master's in business administration and recognition as a Vermont Rising Stars under 40. Due to her passion for the environment, Allyson was motivated to bring her background at a member-driven, nonprofit to 1% for the Planet. Allyson lives with her husband, son and cat at Bolton Valley Ski Resort, where they enjoy hosting—whether it be in the kitchen or out on the slopes. She and her husband also own a photobooth business, which takes them to many spectacular events—allowing them to meet new people and acquire an outlandish costume collection and vintage vans.

Allyson Bartlett on LinkedIn

Jaclyn McCarthy

Director, Brand and Marketing

Jaclyn joined 1% for the Planet in 2018. As the organization’s Director of Brand & Marketing, she oversees the organization’s brand strategy, creative direction, communications and event management. During her tenure, the 1% for the Planet brand has experienced remarkable growth. Prior to 1% for the Planet, Jaclyn earned a BA degree in Media & Journalism at The University of North Carolina at Chapel Hill. In 2016, she began her career at Fuse Marketing, where she honed her skills in experiential marketing and brand strategy. Today, Jaclyn is a dynamic professional with a knack for purpose-driven marketing and a zest for life's many adventures.

Jaclyn McCarthy on LinkedIn

Chelsey Sleznikow

Director of Business Development

Chelsey is a strategic partnership and business development leader dedicated to driving growth at the intersection of business and environmental impact. With extensive experience across tech companies of all sizes and stages, Chelsey has built a career on forging creative partnerships and developing scalable growth strategies. Now bringing this expertise to 1% for the Planet, Chelsey is focused on expanding the organization's business membership network. A longtime admirer of 1% for the Planet's mission, she believes deeply in the power of businesses to catalyze meaningful environmental change and is committed to amplifying their collective impact.

Chelsey Sleznikow on LinkedIn

Mark Steinbuck

Senior Director of Impact Programs

Mark oversees partnership advising and the creation and enforcement of vetting standards. An author with a master’s degree in Human-Environment Interactions from Colorado State and a BA in Anthropology from the University of Wisconsin–Madison, Mark has a background in outdoor industry corporate responsibility and business, as well as program and project management at grassroots organizations. Based in Madison, WI, with his wife Annie, kids Ivan and Jela, and a menagerie of pets, he is a musician, fly angler and camper of the lakes and forests of the Upper Midwest.

Mark Steinbuck on LinkedIn

Kiera Murphy

Senior Strategic Partnerships Manager

Kiera leads the development and execution of high-level strategic partnerships to further 1% for the Planet's mission and movement. Since joining in 2021, she's helped scale the organization's global network. Previously, Kiera led the award-winning sustainability strategy at 4 Pines Brewing Company in Sydney, Australia, and consulted with businesses of all sizes navigating their sustainability journeys. With a master's in public policy and international experience from Jordan to India to her home state of California, Kiera brings a truly global lens to environmental action.

Kiera Murphy on LinkedIn