GuideWell Executive Leadership Team

Our proactive executive leadership team combines the wisdom of experience with a rare ability to approach challenges with fresh, imaginative thinking. By partnering accountability with innovation we’ve created a winning corporate culture.


Patrick “Pat” Geraghty

Chief Executive Officer,
GuideWell Mutual Holding Corporation, Florida Blue and GuideWell Group, Inc.

Patrick “Pat” Geraghty is chief executive officer (CEO) of GuideWell Mutual Holding Corporation, Florida Blue and GuideWell Group, Inc. GuideWell is a mutual insurance holding company and is a family of forward-thinking companies focused on transforming health care. The holding company includes Florida Blue, GuideWell Connect, GuideWell Health, GuideWell Source and PopHealthCare.

Geraghty holds a Bachelor of Arts from Colgate University and has participated in executive education programs at Harvard University School of Public Health and the Wharton School at the University of Pennsylvania.


René Lerer, M.D.

President, GuideWell Mutual Holding Corporation, Florida Blue and GuideWell Group, Inc.

René Lerer, M.D., is president of GuideWell Mutual Holding Corporation, Florida Blue and GuideWell Group, Inc. GuideWell is a family of forward-thinking companies focused on transforming health care, and includes Florida Blue, GuideWell Connect, GuideWell Health, GuideWell Source and PopHealthCare.

Dr. Lerer holds a bachelor’s degree in psychobiology from Oberlin College and a doctor of medicine degree from the State University of New York at Buffalo. He is board-certified in internal medicine.


Chuck Divita

Chief Financial Officer

Chuck Divita is the chief financial officer and has overall responsibility for the financial areas of the company including: accounting, actuarial, underwriting, corporate tax, corporate planning, procurement, mergers and acquisitions, treasury and the investment operations.

Divita holds Bachelors of Science degrees in both Finance and Accounting from Florida State University and is a certified public accountant. He is also a member of Florida Institute of CPAs.


Sarah Iselin

Senior Vice President and Chief Strategy Officer

Sarah Iselin is GuideWell’s Senior Vice President and Chief Strategy Officer. In this role, she serves as a member of the Enterprise Executive Management Team and leads strategy, brand and integrated market intelligence for the company.

Iselin brings to GuideWell more than 20 years of experience in health care strategy, policy, finance and philanthropy in both the private and public sectors. She most recently served as President of Optum Federal, where she led the federal government business, a $300+ million segment with more than 1,000 employees. She also developed the company’s state and federal government business strategy.

Prior to joining Optum, she held a number of senior positions with Blue Cross Blue Shield of Massachusetts and its foundation. She served as the health insurer’s Senior Vice President of Strategy, Policy and Community Partnerships and Chief Strategy Officer and led the company’s strategic services team, which encompassed internal business consulting, strategic and business planning, and competitive intelligence. Earlier in her tenure with the company, she served as Chief of Staff, Health Care Services. She also served as President of the Blue Cross Blue Shield of Massachusetts Foundation.

In the public sector, Iselin served as Special Assistant to Massachusetts Governor Deval Patrick, who tapped her in 2014 to lead the turn-around of the state’s implementation of the Affordable Care Act. In a prior stint with state government, she served as Commissioner of the Division of Health Care Finance and Policy, the agency responsible for managing and monitoring critical phases of the implementation of the state’s landmark 2006 health care reform law. She also co-chaired the Special Commission on the Health Care Payment System, which recommended a major overhaul of physician and hospital reimbursement.

Earlier in her career she worked in health care finance with the Massachusetts Hospital Association and in quality improvement and planning with the Visiting Nurse Association of Boston.

Iselin holds a Master of Science degree in Health Policy and Management from the Harvard School of Public Health.


Charlie Joseph

Senior Vice President, General Counsel and Corporate Secretary

Charlie Joseph is general counsel and corporate secretary. Joseph is accountable for leading the company’s corporate affairs group, which includes: Legal Affairs, Business Assurance, Business Ethics, Integrity and Compliance, Public Policy and Community Engagement, and Board Governance. He also serves as the senior legal advisor to management and the Board of Directors on a wide range of matters.

Joseph holds a Bachelor of Arts in Economics from Hamilton College and a Juris Doctorate from the University of Virginia School of Law. He is a member of the Bars of the State of New York and the District of Columbia, and is certified as Authorized House Counsel under Chapter 17, Rules Regulating the Florida Bar.


Prakash Patel, M.D.

Chief Operating Officer, GuideWell Mutual Holding Corporation; President, GuideWell Health

In his role as COO of GuideWell, Prakash Patel, M.D., oversees provider network management, medical operations, analytics and service, with a focus on enhancing customer and provider experience and leveraging data for improved outcomes and more effective medical and administrative cost management. Additionally, Patel leads GuideWell Health, the organization’s health care delivery company. GuideWell Health is transforming health care to create superior outcomes and experiences for patients through delivery system innovation, provider management services and value-based care.

Patel holds a bachelor’s degree from the University of Michigan and a doctor of medicine degree from Cornell University Medical College.


Amy Ruth

Senior Vice President, Human Services Group and Chief Human Resource Officer

As chief human resource officer, Amy Ruth brings her extensive knowledge of human capital development and talent management to provide executive leadership for the company’s human resources, diversity, corporate services and strategic facilities.

Ruth holds a Bachelor of Business Administration in Marketing from Kennesaw State University.


Erin Somers

Chief Communications Officer

As chief communications officer, Erin Somers is responsible for strategic communications, including employee, human resource, sales, provider, member and executive communications, as well as social media, media relations and reputation leadership.

A member of the Public Relations Society of America and the American Marketing Association, Somers is the recipient of numerous awards for excellence in communications strategy and tactics, including recognition for her work in crisis communications, branding, institutional programs, internal communications, annual report development and speechwriting.

She holds a bachelor’s degree and a master’s degree from the University of Minnesota.


Shawn Trotter-Mitchell

Vice President and Chief of Staff to the Office of the CEO

As vice president and chief of staff to the office of the CEO, Shawn Trotter-Mitchell is responsible for assisting with the CEO’s plan and coordinating the strategic, cross-functional activities of the executive office, including managing executive committee efforts. Trotter-Mitchell ensures that decisions are communicated and that action items are coordinated between the four business units and completed. She also defines issues and decisions that need focus and involvement from the CEO’s office.

Trotter-Mitchell holds a Bachelor’s degree in Biology from Hampton University and Master’s degree in Public Health from Yale University School of Medicine.