Staff & Board
Our Staff
DJ Close
Executive Director
DJ Close
Executive Director
LinkedinD.J. Close is a civic and social impact leader with a proven track record in cross-sector partnerships. His background in philanthropy, nonprofit, government and private business have all focused on addressing inequities in Colorado communities.
Previously, Close was Director of Giving and Executive Director of the DaVita Giving Foundation - a Fortune 500® Health care company. Before joining DaVita, he worked at Mile High United Way and started the Colorado Reading Corps, an AmeriCorps program focused on K-3 grade literacy. Prior to Mile High United Way D.J. worked in The Office of Colorado Lt. Governor Joseph Garcia, and is a graduate of El Pomar Foundation’s Fellowship program.
A graduate from the University of Denver with a degree in Political Science and Leadership, D.J. has a deep passion for civic engagement and believes the greatest impact occurs when private, public, philanthropic and nonprofit organizations engage together with the purpose of achieving a common goal.
D.J. was appointed by Governor Jared Polis to serve on the Governor’s Commission for Community Service, also known as Serve Colorado. He continues to serve on the boards of B:Civic and Colorado Youth for a Change as past Board Chair to both organizations. Born and raised in Durango, Colorado, D.J. lives in Denver with his husband Sinjin and dog Herschel.
Brittany Marcum
Administrative Assistant
Brittany Marcum
Administrative Assistant
LinkedinBrittany brings many years of experience in customer service, administrative support, and project management to the foundation team. Coming to work more closely alongside leadership community members in recent years has helped her to grow exponentially in her abilities of threading a path through workflow processes, navigating culture shifts, and being able to look across all areas of a company with a farsighted view, while balancing a nearsighted focus. Brittany’s superpower is her interpersonal skills, coming from a people-centered core value that leads her in her work each day. Holding the space for others to feel seen, heard, and valued is what she looks to continue curating in the world around her, through professional and personal efforts. Brittany believes being a part of the foundation team encourages this same goal through quality, equity, and inclusion to all it provides to its grantees in the oral healthcare community. When she is not in the office, Brittany enjoys spending time with her family, friends, and houseplants that have quickly become a healthy obsession within her space. She also enjoys the ever-changing seasons of Colorado, being a transplant from Idaho since 2007, and engages in local events and festivities that allow her to step outside of her comfort zone, if adventures are to be had.
Carla Castillo
Senior Program Officer
Carla Castillo
Senior Program Officer
LinkedinCarla Castillo is a highly experienced and passionate professional with a proven track record of helping underrepresented populations succeed in higher education and beyond. She has over 15 years of experience in the education field, working in a variety of roles, including grantmaking, college counseling, community relations, and adult education.
In her previous role as Senior Program Manager at the Colorado Department of Higher Education, she launched and managed a $15 million federally funded student success program for adult students impacted by the COVID-19 pandemic. The program helped close to 3,000 students complete their degrees. Carla is skilled in grant management, process improvement, and stakeholder engagement.
Carla is particularly passionate about supporting Coloradans thrive and believes that everyone deserves the opportunity to pursue the life of their dreams, regardless of their background. She is a proud immigrant from Lima, Peru who was raised in Aurora, Colorado. She earned her bachelor's degree in psychology and Spanish from the University of Colorado Boulder and her master's degree in Nonprofit Management from Regis University.
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. 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, and Certificates in Environmental, Social, and Governance Strategy from CU Boulder, Sustainability Reporting from Arizona State University, and Financial Success for Nonprofits from Cornell University. She is proud to have worked in the nonprofit sector since 2009. Mara lives in Centennial with her two young daughters, Story and Hazel.
Veronica Contreras de Raya
Senior Marketing Specialist
Veronica Contreras de Raya
Senior Marketing Specialist
LinkedinOur 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
Ashley Comstock
Ashley Comstock
Ashley Comstock is Executive Vice President and Chief Financial Officer for Vectra Bank Colorado. She manages the overall financial strategy for Vectra Bank and its 35 branches. Comstock develops the strategic financial planning that drives Vectra’s continued growth, while managing the bank’s risk.
Comstock brings more than 15 years of financial services experience to role. Since joining Vectra Bank in 2012, Comstock has managed accounting, finance, and corporate property, while adding responsibility for marketing, treasury management, and retail banking in 2024.
Prior to joining Vectra, Comstock was with Deloitte in Audit and Enterprise Risk Services, where she held various positions and served clients across the financial services industry. Comstock graduated from Gonzaga University, School of Business Administration, with a Bachelor’s in Business Administration BBA in accounting and currently serves as a Board Member for the Colorado Bankers Association.
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.
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.
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.
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. 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.
