McCarthy currently serves as EVP of CVS Health after their acquisition of Aetna. Previously, she served as EVP of technology and operations for Aetna Inc. and a member of Aetna's executive leadership team. Previously, she was SVP of information technology at Cigna and worked in technology consulting at Andersen Consulting (Accenture). She has been recognized as one of Insurance & Technology magazine's "Elite 8" and Computerworld's Top 100 leaders.