Our Leadership Team

Each member of the leadership team at Specialists On Call is dedicated to a healthcare vision—access to the best emergency specialty care for every patient at every hospital. This forward-thinking group of clinicians and entrepreneurs draws upon a great depth of experience to deliver innovative, cost-effective solutions.

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Hammad Shah


Mr. Shah oversees the corporate direction and strategy for SOC, and has more than 20 years of experience in healthcare leadership, serving in senior administrative, strategic and operational roles.

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Hai Tran


Mr. Tran has over 20 years of experience as a financial executive with both public and private companies, focusing on building growth-oriented finance organizations.

Til Jolly

Til Jolly, MD, FACEP


Dr. Jolly is a board certified emergency physician with 20 years of experience practicing in the Washington, D.C. area at both The George Washington University Hospital and Inova Fairfax Hospital.

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Sean Banerjee


Mr. Banerjee is a technologist and a healthcare product simplification evangelist with 20 years of IT leadership experience in leading large IT software engineering shops in multiple successful healthcare tech startups.

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Ann Kessinger

EVP, Sales & Client Engagement

Ms. Kessinger is a highly skilled and effective sales leader specializing in maintaining and expanding client accounts and exceeding annual revenue goals.

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Mauricio Sirvent

GM, Neurology Franchise

Mr. Sirvent currently serves as the General Manager of the Neurology Franchise of Specialists On Call and CEO of NeuroCall which was acquired by SOC in early 2017.

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Mike Vecchione, DO

Chief of Neurology

Getting his start in medicine as a radiologic technologist with the United States Navy, Dr. Vecchione has been dedicated to healthcare for more than 20 years.

Alberto Peñalver, MD

Chief of Psychiatry

Dr. Peñalver received his M.D. from the University of Miami in 1985 prior to completing his residency through Jackson Memorial Medical Center and the University of Miami in 1989.

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William Krimsky, MD, FCCP

Chief of Critical Care

Specializing in the areas of critical care and internal chest medicine, Dr. Krimsky is triple board certified with the American Board of Internal Medicine in the areas of Internal Medicine, Pulmonary Disease, and Critical Care Medicine.