Leadership Team
Meet the Banner|Aetna Leadership Team
Victoria Coley
Chief Executive Officer
Victoria Coley is the Chief Executive Officer of Banner|Aetna, an Arizona-based joint venture health insurer. With over 20 years of health plan expertise, Coley’s strategic, proven leadership has been a catalyst for growth across commercial and Medicare lines of business for multiple national payers. Most recently, she was Chief Medicare Officer for Aetna’s Arizona and Mountain Markets, prior to which she held several sales leadership roles at Humana.
A trusted civic advisor and active volunteer in her community, Coley has also served as a board trustee for San Miguel High School and a board member for the Glendale Chamber of Commerce and the Arizona Association of Health Underwriters.
John Byrnes
Chief Operating Officer
John Byrnes is Chief Operating Officer of Banner|Aetna. He is responsible for guiding the development and delivery of the company’s strategy, as well as leading day to day operations to improve outcomes for members and partners.
With over 15 years of experience in health care operations and strategic planning, Byrnes has helped transform national payer organizations by aligning business objectives with innovative, patient-centered models of care. Prior to joining Banner|Aetna, he held leadership roles at Aetna and CVS Health across Consumer Health Services, Enterprise Strategy, and Government Relations. He most recently served as Executive Director of Clinical and Network Operations, where he led improvements in care delivery, business processes, and provider collaboration across diverse health care systems.
Mizell is a proven leader who has consistently delivered growth to various organizations and market segments by developing strong teams, crafting creative strategies and fostering deep community and client relationships. As Chief Operating Officer of Banner|Aetna, Mizell leverages her experience and well-established network in Arizona to execute the organization’s mission of helping employers improve the health and well-being of their workforce, while simplifying the coverage-to-care-to-payment of health care for its members.
Mizell started her career in Orange County and Los Angeles, California before relocating to Arizona in 1998. Mizell’s previous roles at Aetna Included building sales and service teams for large employers, managing the growth, client satisfaction, and profit & loss for a four state market that included Arizona. Mizell also led the creation and build of a new product portfolio for Aetna's National Accounts segment, simplifying the selection, purchasing and administration of voluntary products for Aetna’s largest clients. Outside of Aetna, Mizell was a broker/advisor at an international insurance brokerage firm, where she served as lead health care and benefits design strategist for larger, complex clients.
Mizell has also worked in both paid and volunteer leadership roles for several humanitarian and animal protection organizations. She continues to be actively involved in formal local and state advocacy aimed at improving lives through proposed legislative and policy changes in Arizona and in the United States.
Prior to beginning her career at Aetna, Mizell studied Business Administration at California State University at Fullerton, while working full-time in the employee benefits department of Hughes Aircraft Company. Making lives better by delivering best-in-class employee benefits has been her career journey ever since. Mizell’s role at Banner|Aetna takes that experience and passion to the next level.
Dan Keller
Chief Financial Officer
Dan Keller is the founding Chief Financial Officer of Banner|Aetna. In this role, he oversees the financial performance of the organization and partners closely with the CEO to drive the company’s strategic priorities.
Keller brings more than 30 years of experience in health care finance, actuarial, and underwriting leadership. Prior to joining Banner|Aetna, he served as CFO for Aetna’s Arizona, Colorado, and New Mexico markets. Earlier in his career, he led pricing strategy as Head of Americas for Aetna International, based in Hartford, Connecticut. An active contributor to his community, Keller currently serves on the Phoenix Heart Walk Executive Leadership Team for the American Heart Association.
Dan is a graduate of the University of Wisconsin – Eau Claire, where he received his Bachelor of Science in Mathematics.
Transforming health care, together
Banner|Aetna aims to offer access to more efficient and effective member care at a more affordable cost. We join the right medical professionals with the right technology, so members benefit from quality, personalized health care designed to help them reach their health ambitions.
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