The working Board of Directors at IMPACT Personal Safety of Colorado leverages its members’ professional knowledge, creativity, and belief in the value of IMPACT courses and workshops to help the organization meet its goals and grow. The BOD welcomes your interest in becoming a member or advisor.

Sam Gallaher, Treasurer

BOD Treasurer Sam GallaherSam Gallaher, PhD, began his service on the Board in the fall of 2017. His first experience with IMPACT Colorado was as a student of their first Men’s Basic Course in 2012. In 2013, he joined his wife Laura in the Advanced Course. IMPACT training has increased their self-esteem and the communication skills learned in these courses have added immensely to their marriage.

Sam grew up in southeast Washington state, where his passion for public service was forged working at Camp Grizzly, the local Boy Scout camp. After earning a BS in Manufacturing and Industrial Engineering from Oregon State University, Sam moved to Colorado to work for Johns Manville. He joined the organization’s philanthropy board, JM Stars, and organized the company’s quarterly blood drive.

Desiring a stronger link between his work and his community, Sam completed a Master of Public Administration and PhD in Public Affairs from the University of Colorado Denver. He currently works in the Denver Auditor’s Office.

Sam is excited to use his policy and public administration knowledge and analytical skills to benefit the organization.

Marc Hoffman, Vice Chair

IMPACT Board member Marc HoffmanMarc joined IMPACT in the spring of 2018, bringing a diverse set of life and educational experiences to the Board. Marc grew up in Buffalo, NY, and moved to Denver in 2015 with his wife, Erin, and their two cats, Cosmo Kramer and Eleanor Roosevelt. In his free time, he loves going on day hikes and anything to do with music!

After obtaining an undergraduate degree in Business Administration from SUNY Potsdam in 2006, he began working in direct care after a fun summer camp job for adults with disabilities. Marc worked a few years for the largest nonprofit agency in Western New York, eventually applying his business acumen to individuals’ financial accounts, working as an internal auditor and audit manager for five more years. Marc earned an MBA in Nonprofit Management in 2013 and eventually moved to Denver. While enjoying his work for the City and County of Denver as a Senior Performance Auditor, Marc had been looking to get more involved in the community. Upon learning of IMPACT and their amazing work, he couldn’t wait to get involved!

Jill Schmieding, Chair

Originally from Nebraska, Jill came to Denver in 2014 to pursue new career opportunities. She has a Bachelor of Science in Business Management and works in finance, where her primary focus is assisting people with personal wealth management.

IMPACT has served as a great fit for Jill. After taking the Women’s Basics Course and finding it to be rewarding in many different ways, she began volunteering as an assistant teacher. In 2017, she was invited to bring her enthusiastic attitude and fresh ideas to IMPACT’s Board of Directors.

Jill looks forward to helping the organization grow in Colorado and loves the idea of helping women, men and children feel empowered and use their voices. Her volunteer service stems from her passion for helping people.

Susan Harrington, Advisor

Board member Susan Harrington
© Verte Photography

Susan hails from Wisconsin, relocated to Boston for college and career, and then moved to Denver in 2004 with her husband. She has over 20 years of experience in research, analytics, marketing, project management and product development.

She holds an MBA from Bentley University, graduated with high honors and received the Graduate Marketing Student of the Year Award. She is a National Merit Scholar.

Susan first became involved with IMPACT after hearing Colorado chapter founder Amelia Dorn speak at a Shine event and taking the Women’s Basics Course. She joined the Board of Directors in 2016.

Sarah Shepherd, Board Member

Board Advisor Sarah ShepherdSarah served as Executive Director of IMPACT Personal Safety Colorado from summer 2010 to December 2016. After taking her first IMPACT Basics Course in 2010, she instantly recognized that the program should be available to everyone in her life and offered to help the Dorns expand their coursework in Denver. Sarah hopes her career in nonprofit business development and personal safety will enable her to lead by example and share her passion for safety and self-efficacy skills with people everywhere she goes.


David Forest Dorn, Founder and Board Member Emeritus

Founder David Forest DornDavid grew up right here in Colorado. In 2003, while working as an architect in Los Angeles, he took the Men’s Basics Course with IMPACT Personal Safety of Southern California. As a longtime philanthropist and champion of equality, David was immediately drawn to IMPACT’s missions and important work.

David and his wife Amelia returned home in 2005 and founded the Colorado Chapter of IMPACT Personal Safety in 2006. David served as the founding Board Chair and continues to play active and inspiring roles on the Board of Directors and on the big blue mats.

David works passionately as an architect at Open Studio Architecture. He enjoys the outdoors and is the proud father of two empowered kids.

Amber Rivera, Advisor

Amber’s awe of IMPACT’s work started in 2016 when, like so many others, it profoundly changed her life and relationship to self. She’s taken every possible class and been involved ever since. Amber leads All Things Data for the Board, cutting across every function of the organization.

Amber is a Colorado native but had the pleasure of living in Washington DC for school at Georgetown University, and has enjoyed many travel adventures. She is blessed with an awesome kiddo, loves her career in data science, and likes to say that IMPACT is the gift that keeps on giving.