Our Staff

Adeeb Khan

Executive Director

Adeeb 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). 


Megan Wilson

Deputy Director

Megan leads Delta Dental of Colorado Foundation’s philanthropic and policy efforts. She is responsible for focusing the foundation to expand access, increase prevention and facilitate the connection between oral and overall health across Colorado. Most recently, she was the executive director of Reach Out and Read Colorado. She has spent her career working in the nonprofit sector focused on family support and advocacy and has extensive experience leading teams and developing programs. She has a master’s degree in public service management from DePaul University. She serves on the board of Parent Possible.


Andrea Miller

Director of Corporate Social Responsibility

Andrea is the director of corporate social responsibility for Delta Dental of Colorado. She is responsible for team member engagement, sustainability, community board leadership development, sponsorships, and strategic relationships. Her background includes 17 years of nonprofit management, training, and fundraising. She holds a bachelor’s degree in elementary education from Illinois State University and a master’s degree in public administration from the University of North Texas.


Lori Casillas

Manager of Grantmaking and Programs

Lori 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. 


Kaye Kavanagh

Evaluation Manager

Kaye 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. 

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 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 is a 4th generation Colorado native. Jocelyn graduated from Metropolitan State University of Denver with a B.A. in Hospitality and Events Management. She comes to us with over 10 years’ experience in C-suite executive administration in human resource, finance, logistics, and technology. Driven by a commitment to strive for excellence she takes pride in providing the best support for the entire organization. Jocelyn plays a vital role supporting the Delta Dental Foundation, Board of Directors and in the overall culture and employee engagement that are part of the Foundation and Corporate Social Responsibility teams.


Mara Holiday

Senior Program Officer, Early Childhood and Prevention

Mara 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 is responsible for implementing the connections to overall health focus area, including the managing of data and analysis. Most recently, Mirella served as the bilingual spokesperson for the foundation during her role asDelta Dental of Colorado’s community benefit coordinator and tooth fairy. She has a bachelor’s of science in healthcare management from Metropolitan State University of Denver. Mirella also participates in the RoadRunners Read Book Club and is a longtime volunteer with Colorado Mission of Mercy.


Veronica Contreras de Raya

Marketing Communications Specialist

Veronica helps share how the foundation advances oral health equity and supports Delta Dental of Colorado’s Corporate Social Responsibility program. Veronica has been working with community-based organizations for over 10 years. She earned an associate’s degree in film and video technology from the Colorado Film School at the Community College of Aurora as well as a bachelor’s in technical communications from Metropolitan State University.


Our Board

Kelly J. Brough, MBA

Board Chair

Kelly J. Brough, Delta Dental of Colorado Foundation board chair, is the president and CEO of the Denver Metro Chamber of Commerce. The chamber represents approximately 3,000 businesses and their 300,000 employees in Colorado. Prior to joining the chamber, Ms. Brough served as a chief of staff for Mayor John Hickenlooper and the City and County of Denver where she oversaw a general fund of $857 million. She also served as deputy chief of staff and director of the Denver Office of Accountability and Reform for the city. In that role, she implemented the city’s new 3-1-1 customer service system and created an organizational culture that embraced performance management and continuous improvement.


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 currently serves as president and CEO of Delta Dental of Colorado. Prior to this position, Helen served as regional vice president of Anthem Blue Cross and Blue Shield, where she worked in a variety of leadership roles for 30 years. She received her bachelor’s degree in sociology from the University of New Mexico and certification by Senn Delaney as a cultural transformation facilitator. Helen recently served on the Women’s Leadership Council for United Way of Greater Atlanta. She also served as chair of the board of directors of Florence Crittenton Services.


Scott Hamilton, DDS

Dr. Scott Hamilton is a pediatric dentist at Denver Health. He graduated from the University of Nebraska Medical Center with his Doctor of Dental Science degree in 1999 and completed a residency in Pediatric Dentistry. While living in Nebraska, he owned a pediatric dental practice for many years and taught as an Assistant Professor at the University of Nebraska College of Dentistry.


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

Dr. Kim Kretsch is a founding partner in Colorado Dentistry for Children in Brush, Colorado. She holds a Bachelor of Science degree from the University of Iowa with a certificate in dental hygiene, a DDS degree from the University of Colorado, a certificate in pediatric dentistry from Children’s Hospital of Wisconsin, and a Master’s in Business Administration from Regis University. She is a member of the American Dental Association, Colorado Dental Association and a past president of the Boulder Broomfield County Dental Society. She is also a member of the American Academy of Pediatric Dentistry and well as a diplomate of American Board of Pediatric Dentistry.


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, 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.


Tamanna Tiwari, MPH, MDS, BDS

Dr. Tamanna Tiwari is a dentist and an assistant professor in the Department of Community Dentistry and Population Health and Associate Director, Center for Oral Disease Prevention and Population Health Research at the School of Dental Medicine at the University of Colorado. She obtained a master degree in public health in global health leadership from New York University. Dr. Tiwari is funded by the National Institute of Dental and Craniofacial Research and the Colorado Clinical and Translational Science Institute to conduct research to reduce oral health inequalities in children in Colorado. She received the Colgate Award for Research Excellence in 2018. She is a member of American (International) Association for Dental Research and American Public Health Association and is an elected officer at both the organizations. She has published over 30 peer-reviewed publications and has presented her research at several national and international conferences.