She has been a Nurse Practitioner since 1999. Darlene has worked with several practices in Arizona managing cardiac patients and specializing in heart failure care. She has been on the medical staff of several hospitals and worked as a liaison for patients seeking heart transplants and left ventricular assist devices. She worked with the community, giving lectures on Congestive Heart Failure. She was instrumental in obtaining National Certification for the only office-based Congestive Heart Failure Clinic in the nation.