Our Team

Melissa Willmarth

Executive Director

Melissa has a passion for sharing the love of Christ by helping bring people together to meet the needs of our neighbors for the glory of God. Over the past 9 years she has been actively involved with several non-profit organizations with a mission to help the underserved stabilize their lives and build their resources in an environment of dignity and respect. In all, her desire is that Hope Clinic would be a place bringing people together to meet medical needs, build community, and share the good news of Christ. Before joining Hope Clinic staff, she worked as a finance executive and CPA for over 25 years. Melissa lives in downtown McKinney with her husband Doug and their five children.

Andrea Naff

Operations Manager

Andrea graduated from Texas Christian University with a degree in speech-language pathology then with her masters from Radford University in Virginia. After just a handful of years practicing as a medical speech pathologist, the Lord called her to raise her rapidly growing family while homeschooling them for over a decade. Toward the end of that season, the Lord gave both Andrea, and her husband, Jason, an overwhelming burden to surrender to the call to vocational ministry (Jason) and the vision behind Hope Clinic (Andrea). It is her desire to walk alongside the Family of Hope Clinic as well as the City of McKinney to serve, strengthen and honor all people for the Common Good of the Kingdom of God. Andrea and her husband live in McKinney and have the honor of raising their six daughters.

Jenny Konvicka

Director of Patient Services

Jenny began as a volunteer with Hope Clinic on day one and was invited to join the staff as Patient Care Coordinator in February 2019. She studied Spanish and Music at Ouachita Baptist University and has served as the Student Ministry Coordinator for the Parks Church. There is no better place to combine her passion for serving others, sharing the love of Jesus, and employing her Spanish language skills than serving the patients of Hope Clinic. Her greatest joy has been experiencing Jesus in each patient that walks through the door.

Tiffany Lowery

Nurse Manager

Tiffany graduated from UAMS as a Registered Nurse and later obtained her masters from Walden University. She has worked in various areas of nursing during her 12 years of nursing. She has always had a desire for helping others and spreading the word of Jesus Christ. She is a true believer that healing comes from within and involves mind, body and spirit. Tiffany joined Hope Clinic August 2019 after working with Dr. Twyman for several years at another healthcare facility. She resides in Grand Prairie, Texas with her husband Charles and two beautiful children Jaden and Cameron.

Denise McMillan

Volunteer Coordinator

Being raised by a single mom instilled a passion in Denise to help those fighting to rise out of poverty, and advocate for those who can’t advocate for themselves. After completing her internship at Letot Center in Dallas, Denise pursued a career in Management and HR, earning partnership at her firm. 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 passion as a CASA guardian ad litem, then to the Hope Clinic Planning Team, volunteering as VC before coming on staff part time. Her desire at Hope is for families to receive holistic healthcare with loving compassion, while never being forced to choose between food, shelter or their health. Denise is married to Bill McMillan. They share four children and seven huggable grandchildren.

Alondra Lopez

Office Manager

Caitlin Twyman


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.

Franchesca Sanchez, MA, LPC, NCC.

Licensed Professional Counselor

Franchesca previously worked as a teacher and counselor back in Puerto Rico. After getting married, Franchesca moved to Texas and started working as a teacher at Dallas ISD. A year after she started to pursue her counseling license in Texas, finding herself going back to school at LeTourneau University. After completing her requirements and getting her Licensed Professional Counselor-Intern status she started working at a local non-profit and was placed at a clinic in Dallas. For two years she provided counseling services for those who were uninsured and were mostly Spanish speaking. During this time she completed her second masters in Marriage and Family Therapy as a complement to her previous Masters in Counseling. After more than 3 years as a professional counselor, Franchesca has seen the need for mental health services that go beyond the surface and encourage honest and sincere relationships. She is committed to bridge the gap of language, culture and mental health with her knowledge, experience, warmth, and genuineness.

Heidi Willers

Grant Writing

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.

Our Board

Kyle Redel

The Parks Church

At Hope Clinic all people are treated with dignity, care, and respect as image bearers of our God. Hope Clinic tangibly demonstrates the love of Jesus to the uninsured in McKinney. I believe in the mission of Hope because at the heart of it is the mission of Christ.

Stephen Twyman, MD, MPH

Hope Clinic Medical Director, John Peter Smith Hospital

“We have a lot of need in our community, and Hope Clinic is an opportunity to meet that need. It’s been rewarding and fun to get to engage with our community, to try to partner and work together to meet the health and spiritual needs of our neighbors. For medical professionals who are looking to remember their original goal of helping people and making a difference, Hope Clinic is a perfect opportunity. It is an outlet for one-on-one patient relationships that we providers sometimes don’t get as much as we want.

Hope Clinic is unique. Our patients feel at home. We’ve had multiple patients come up to the clinic just to hang out with us and I have never heard of that in another clinical context. That is the best thing that we have going for us– God has graciously empowered us to really connect well with our patients and to establish a place where they feel comfortable, welcomed and loved. If you are someone who knows that you would like to use your medical skills in some way to advance the kingdom of God, then you will absolutely have opportunities to do that here. If you are not a believer, but you know that there is more to what you do and the skills that you have than just making money, Hope Clinic is definitely a place for you.”

Pat Reilly, CPA

Reilly CPA Firm

“Hope Clinic of McKinney provides a unique service to those who could not otherwise receive medical help. The pastoral care provided is a special opportunity to speak the Gospel to those we might have never met. Though I have zero medical expertise, I can help provide needed medical services through my volunteered talents. ”

Aaron Snell

The Parks Church

“Our faith calls us to live with eyes wide open to the needs of those around us. A major need that was identified in our city was the lack of healthcare for those without insurance. What an incredible opportunity to serve as visible images of Jesus while meeting physical needs and serving our city. Hope Clinic’s mission to step in and play a part in addressing this need in our community has made a major impact in McKinney. It’s an honor to be on the team.”

Billy Booker

Retired Psychological Consultant

“I agreed to start volunteering in a Pastoral Care role at Hope Clinic because I saw the great works they were doing in Collin County and I wanted to be a part of that effort. Additionally, serving on the Board has given me an opportunity to further impact the services Hope Clinic provides to the community.”

Teresa Craighead

New Generation Media

“From the moment I became aware of Hope Clinic’s mission to reach uninsured patients in McKinney and provide them with a sound medical home, I became a fervent supporter. The staff at Hope is caring, dedicated, and talented. The Clinic’s mission to treat the whole patient, including their soul and spirit, embodies Jesus’ message to care for the needy. Serving on the board is a privilege, and gives me the opportunity to further support Hope’s mission and future.”

Sam Deford

The Parks Church

Several encounters with those who had little or no access to healthcare led to a deep desire to see Hope Clinic succeed. I fully believe in the mission of Hope to serve the individuals and families of this city by meeting medical needs while engaging the soul of each patient. As a board member, I am very thankful and honored for the opportunity to serve the patients and providers at our clinic. My hope is that our community continues to become more aware of those around us that need care and encouragement.

We are all in this together!

Jenny Williams, RN

Baylor, Scott, and White Health

Hope Clinic of McKinney is an exemplary model for providing quality, compassionate healthcare for the underprivileged friends and neighbors of McKinney. The love of Christ shines brightly to all those who seek assistance and support.