Meet Our Team

Caitlin Twyman

Executive Director


Caitlin graduated from Oral Roberts University with a degree in Pastoral Care. After a year serving with missionaries in the red light districts of Belgium, she was inspired to attend the University of Tulsa School of Law, with plans to use her degree to serve those without a voice. In law school, she fell in love with immigration law and the immigrant community and began practicing as an immigration attorney. It was in this world that she began to discover the difficulties faced by the uninsured. It is her desire that every Hope Clinic patient not only receives the highest level of care, but feels welcomed, respected, and loved—for we love because He first loved us. Caitlin and her husband, Steve, live in McKinney and have a daughter, Audie, here on earth and a son, Benson that lives in heaven.

Heidi Willers

Operation Manager


Heidi was a member of Hope Clinic’s planning committee and volunteered as the Credentialing Coordinator before joining Hope Clinic’s staff as the Operations Manager in late September 2017. Heidi enjoys working with a terrific team of staff and volunteers committed to providing a medical home that delivers high quality health care to the medically underserved of McKinney and seeing the difference Hope Clinic makes in our patients’ lives. Before joining the Hope Clinic staff, she practiced commercial litigation in Dallas and guardianship and probate law in Collin County. She is a 2013 graduate of SMU Dedman School of Law. Heidi lives in Collin County with her husband and two daughters.

Ashley Workman, RN

Clinical Coordinator


Ashley’s inspiration to become a nurse comes from an innate desire to help people and care for them in times of need. She is a person who thrives on being challenged and always has new goals to achieve, so nursing suited her because nursing of its diversity and learning opportunities. Ashley attended Texas Tech University and received her Bachelor of Science in Nursing. Ashley believes that patients’ willingness to place their lives in the hands of those assigned to care for them demonstrates a true act of trust. This is a great honor and responsibility. Ashley plans to help educate and empower others to take control of their health and quality of life. Ashley family includes her husband, Sean, their son Macstin, and 2 dogs.

Denise McMillan

Volunteer Coordinator


Being raised by a single mom instilled a deep passion in Denise to search for ways to extend a helping hand to those fighting to rise out of poverty while also advocating for those who can’t advocate for themselves. After completing her internship at Letot Center in Dallas, Denise left college to pursue a career in Management, HR, and Team Building, working her way up from clerk to partner. Operating alongside a diverse employee culture, she witnessed firsthand the struggle low income individuals without health insurance undergo. After 30 years in the corporate world, Denise returned to her original field of study and passion as a CASA guardian ad litem and to the Hope Clinic Planning Team. Her desire at Hope is for families and individuals to heal holistically, and be empowered by receiving quality healthcare with dignity and loving compassion – while never being forced to choose between the basics of food, shelter or healthcare. Denise is married to Bill McMillan. They share four children and six huggable grandchildren – by far the best medicine in life.