Staff & Board
Our Staff

Adeeb Khan
Executive Director

Adeeb Khan
Executive Director
LinkedinAdeeb is the Executive Director of Delta Dental of Colorado Foundation. He was previously senior director of corporate social responsibility at TIAA, senior director of volunteer engagement at Mile High United Way, and regional director of health & safety and community services at American Red Cross. He holds an MBA from the Daniels College of Business at the University of Denver and a BA in Communications from the University of Southern California Annenberg School for Communication and Journalism. He is currently serving on the board of the Denver Metro Chamber Leadership Foundation, Executives Partnering in Children (EPIC), the Daniels College of Business, and is a Commissioner on the Early Childhood Leadership Commission (ECLC).

Lori Casillas
Manager of Grantmaking and Programs

Lori Casillas
Manager of Grantmaking and Programs
LinkedinLori leads the grantmaking team and oversees the mission-related investment portfolio at the Foundation. Most recently, Lori was the COO at Hunger Free Colorado where she provided strategic partnership to the CEO and board of directors in areas of finance, fundraising, people strategy, and equity. She has served as a nonprofit executive director, program officer, and director of a statewide health policy project. Lori earned a BA in English and Psychology from Amherst College. She serves on the Board of Directors of The GrowHaus, a food justice organization in north Denver and is a founding member of LatinasGive!, a philanthropic giving circle.Â

Kaye Kavanagh
Evaluation Manager

Kaye Kavanagh
Evaluation Manager
LinkedinKaye leads Delta Dental of Colorado Foundation’s evaluative work as Evaluation Manager. She works with the Foundation’s staff and grantees to define their success and measurement of their goals and by advising on learning questions, data collection, and evaluation strategies.Â
She has spent her career in evaluation, learning and research in nonprofits and government with a focus on health, child and family well-being. She believes that oral health is a key component of overall health and in the importance of addressing social determinants of health to enable every Coloradan to live their best life.
Kaye holds Bachelor’s and Master’s degrees in Sociology from North Dakota State University and is an active community volunteer in West Denver. Her proudest accomplishment is raising two kind, intelligent young men.

Arden Trewartha
Place-based Program Officer

Arden Trewartha
Place-based Program Officer
LinkedinArden is a Place-based Program Officer focusing on increasing access to oral care in the San Luis Valley and Aurora. Prior to starting at Delta Dental, Arden worked in jobs ranging from cofounding and directing a startup organization in South-Central Colorado dedicated to health promotion among low-income children, youth, and families, to joining Peace Corps Peru as a health promoter with her husband in their 40’s. Most recently she served as a Community Partner in South-Central Colorado at The Colorado Trust, working alongside her coworkers to develop a place-based organizing strategy to build individual and collective power among people most impacted by issues to impact systems change. When not working in her remote office or on the road, Arden likes to spend time with her husband and friends in her home in Chaffee County, hiking, volunteering in her community, and instigating backyard potlucks, dinner parties, and general merrymaking.

Jocelyn Bowyer
Executive Assistant

Jocelyn Bowyer
Executive Assistant
LinkedinBio coming soon

Mara Holiday
Senior Program Officer, Early Childhood and Prevention

Mara Holiday
Senior Program Officer, Early Childhood and Prevention
LinkedinMara joined the Delta Dental of Colorado Foundation in July of 2021 as Senior Program Officer, Early Childhood and Prevention. Before joining the Foundation, Mara led global employee engagement efforts for the Western Union Foundation. Prior to that role, Mara worked as a Program Officer at the Buell Foundation managing a diverse portfolio of grantees in the early childhood space. Mara sees herself as a partner to nonprofit organizations and a champion for the good work in early childhood education—including the impact of oral health on a child’s quality of life—that is being accomplished across the state. Mara holds a BA in Arts Management from the University of San Francisco, an MA in Rhetoric and Writing Studies from San Diego State University, a Certificate in Corporate Social Responsibility and Ethics from CU Boulder, and she brings over 13 years of nonprofit and grant-making expertise to her role.

Mirella Chavez
Program Officer, Workforce

Mirella Chavez
Program Officer, Workforce
Linkedin
Veronica Contreras de Raya
Senior Marketing Specialist

Veronica Contreras de Raya
Senior Marketing Specialist
Linkedin
Tracy Anselmo
Policy Manager

Tracy Anselmo
Policy Manager
LinkedinTracy comes to the Delta Dental of Colorado Foundation to help advance oral health equity through policy and oral health coalition development with extensive experience in the fields of dentistry, public health and health policy. Â
Prior to joining the Foundation, Tracy had a variety of roles involving the planning, implementing and evaluating strategic policy and health initiatives in her work as Executive Director of the Colorado Association of Local Public Health Officials, the Oral Health Program Manager for the County of San Luis Obispo CA, and the Dental Director for the State of Colorado. Â
Tracy received her Bachelor of Science in Dental Hygiene from the University of Colorado and her Master’s of Public Health from the Rollins School of Public Health at Emory University in Atlanta, GA. She is a third-generation Coloradan.Â
Our Board

Tamanna Tiwari, MPH, MDS, BDS
Board Chair

Tamanna Tiwari, MPH, MDS, BDS
Board Chair
Dr. Tamanna Tiwari is an Assistant Professor in the Department of Community Dentistry and Population Health and Associate Director, the Center for Oral Disease Prevention and Population Health Research at the School of Dental Medicine at the University of Colorado. She obtained her dental degree from Bharati Vidya Peeth, Pune, India, and a master public health in global health leadership from New York University. Dr. Tiwari is funded by the National Institute of Health and several foundations and industry to conduct research to reduce oral health inequities. Her research delves into the concepts of social determinants of health, and how it impacts communities' oral health, and her projects use participatory community approaches. She disseminates her research both to the scientific community and to communities that participate in her research. Apart from her research, Dr. Tiwari is passionate about gender equity and invests her time in promoting gender equity in the dental workforce. She has presented and published extensively on this topic.

Luella Chavez D’Angelo
Governance Chair

Luella Chavez D’Angelo
Governance Chair
Luella Chavez D’Angelo is the Vice President, Marketing and Communications at Centura Health. Prior to this position, she was the Vice Chancellor, Enterprise Development at the University of Colorado, Denver. She has also worked at Western Union and Western Union Foundation/First Data Foundation. She holds an Master of Business Administration in Finance and a Bachelor of Business Administration in Marketing from the University of New Mexico. She is a board member of many organizations including Bonfils Blood Center Foundation, Mile High United Way and the Denver Metro Chamber of Commerce Board.

Helen Drexler
President and CEO of DDCO

Helen Drexler
President and CEO of DDCO

Joe Garcia

Joe Garcia
Joe Garcia is the Chancellor of the Colorado Community College System. Prior to his role at CCCS, Garcia served as President of the Western Interstate Commission for Higher Education. From 2011 to 2016, he served as the Lt. Governor of Colorado and as the Executive Director of the Colorado Department of Higher Education. During his time as Lt. Governor, Garcia focused on increasing equity in outcomes for all students, particularly those from low-income backgrounds and communities of color. Garcia also served as President of Colorado State University-Pueblo from 2006 to 2010 and Pikes Peak State College from 2001 to 2006.Â

Julie Keegan

Julie Keegan
Julie Keegan spent over 30 years as an executive in the hospital industry in the Denver area. She retired from her position as CFO of Craig Hospital in 2019 after 13 years of service. Ms. Keegan is a graduate of the University of Nebraska-Lincoln with a BS in Accounting. She held a CPA license until retirement. She served on the Board of Directors of the Colorado Chapter of the Healthcare Financial Management Association.

Kim Kretsch, DDS

Kim Kretsch, DDS

Lydia Prado, PhD

Lydia Prado, PhD
Lydia Prado is the Executive Director at Lifespan Local Barton Institute for Community Action. Dr. Prado, a psychologist who earned her doctorate from the University of Denver in 1994, has been with the Mental Health Center of Denver for 17 years and is currently Vice President of Strategic Community Partnerships. She is the visionary behind the Dahlia Campus for Health and Well-being, an international award-winning community center providing an array of mental health services co-located with an urban farm, a preschool, a children's dental clinic, and extensive space for community gatherings.

Ann Somers, DDS

Ann Somers, DDS
Ann Somers, DDS, is a periodontist in Denver and is co-owner of Poulos and Somers. She received her DDS from University of Colorado School of Dentistry in 1993 and her MS degree in periodontics from the University of Texas Health Sciences Center in 1998. She is the recipient of numerous awards and been published in various journals. Dr. Somers also participates in volunteer work at the Howard Dental Center, an oral health care facility centered on individuals living with HIV/AIDS.

Gaye Woods, MBA

Gaye Woods, MBA
Gaye Woods is the System Vice President for Equity & Inclusion at CommonSpirit Health, a nonprofit health system headquartered in Chicago. Her role focuses on the development of health equity strategies to reduce disparities, improve health outcomes, and advance population health. Her multi-industry, professional career includes experience in academia, management consulting, advertising, and non-profits. Â Ms. Woods holds an MBA from Northwestern University - Kellogg School of Management and serves the community through board service with Community First Foundation, Catholic Health Association National Advocacy & Public Policy, and volunteer opportunities that support youth development, education, and older adult access. She has been recognized by the Clinton Foundation, American Public Health Association, Institute for Healthcare Improvement, and Denver Metro Chamber - Leadership Denver.