Michael Pennington is the President and Co-Founder of Platinum Dermatology Partners where he oversees all strategic, operating and growth matters while working to build an organization distinguished by its alignment with the highest quality physicians.

Chief Financial Officer

Mr. John Walker brings extensive experience in finance, business development, operations and strategy execution to Platinum Dermatology Partners.

Chief, Practice Operations

Dr. William Posten is a board certified dermatologist and fellowship trained Mohs micrographic surgeon practicing in Dallas. He received his Bachelor of Science degree with honors from Harvard University and his Medical Doctorate from Yale University.

Senior Vice President, Revenue Management

As Senior Vice President of Revenue Management, Rob Surdek is responsible for overseeing the daily revenue cycle management, credentialing and managed care contracting functions of Platinum Dermatology Partners.

Senior Vice President, Operations

Grizelda Altamirano serves as the Senior Vice President, Operations for Platinum Dermatology Partners where she is responsible for overseeing the day to day operations for all of our clinic locations.

Vice President, Human Resources

Angie Noel serves as the Vice President of Human Resources for Platinum Dermatology Partners. She is responsible for leading all aspects of talent management and HR operations while supporting Platinum’s culture of excellence.

Vice President, Marketing

Ms. Brooke Newton serves as the Vice President, Marketing where she is responsible for overseeing marketing and media strategy, creative, digital, loyalty, and corporate responsibility efforts.

Vice President, Information Technology

Tri Phenix serves as the Vice President of Information Technology. He has responsibilities for leading all areas of IT operations and integrations.