 Having extensive experience in all facets of AHS’ business and in delivering services that meet the ever-changing needs of today's healthcare community, David is responsible for AHS' growth, performance, and strategic direction.
Prior to joining AHS, David has served as President and/or CEO of several leading, nationally-recognized, healthcare services companies, including AHC, Inc. and Argent Healthcare.
Earlier in his career, David held various management positions with Medaphis Physician Services Corp. (now PerSé Technologies) and several other healthcare organizations.
 Mr. Sullivan has a commanding knowledge of the healthcare information systems and services marketplace, and an innate ability to “sense” customers’ ever-expanding needs. He has more than thirty years’ experience in healthcare information systems including system design, development, sales, finance,
marketing and product management.
Prior to founding AHS, Mr. Sullivan was Chairman and CEO of Performance Systems, Inc. (PSI), a professional and operational consulting services firm serving the medical, pharmaceutical and telecommunications industries. Previously, he was founder and CEO of AISCorp (Administrative Information Systems Corporation), providing software solutions and services to healthcare providers in a multitude of practice settings. In 1991, he sold AISCorp to Micro Healthsystems (re-named US Servis), where he was Corporate Vice President of Business Development and Chief Technology Officer. Today, the business is owned by McKesson.
 Ms. Gilreath has more than thirty years’ experience in the healthcare industry. At AHS, she is the Compliance Officer, reflecting ongoing industry changes and policy throughout AHS. She is also
responsible for client development and expansion of value-added services to existing clients.
Ms. Gilreath has held positions in group practice administration, installation services, account management, product management, marketing and sales management. She has worked in physician group practice and in healthcare information systems and services companies. For eight years, she was Group Practice Administrator for a prominent cardiovascular surgical group in central New Jersey, where she had responsibility for daily operations. Ms. Gilreath was also Regional Vice President of the Practice Management Group of McKessonHBOC, and was Regional Vice President, Northeast, for CyCare Systems, Inc., establishing that company’s Northeast operations.
Before AHS, Ms. Gilreath worked closely with Mr. Sullivan at AISCorp, where she held three senior positions, including Senior Vice President of Marketing.
Mr. Da Silva has extensive experience in high technology and medical billing. At AHS, he is responsible for Product Development, Customer Technical Support, and Network Operations. Mr. Da Silva is an expert in medical billing, workflow processes, and IBM System i development and deployment.
Previously, as President of Computer Inventory Applications, Mr. Da Silva developed business applications for large healthcare group practices and billing services that streamlined workflow processes, reduced costs and improved productivity. He was also Project Director at AISCorp (Administrative Information Systems Corporation), where he was responsible for the design, development, testing, and product launch of the first "natively written" practice management application on IBM's AS/400 platform.
As General Manager at Sidal Management Services, Mr. Da Silva supported corporate subsidiaries in the areas of inventory control, warehouse management and metals distribution. He also held positions as Corporate Director for Sidal Aluminum Corporation and Programmer/Project Leader at Tuscany Imports, Jennison Associates and Brooks Fashions. Mr. Da Silva holds a B.S. degree in Data Processing from the State University of New York at Cobleskil.
Mr. Cassidy has a distinguished professional career in healthcare administration. At AHS he is responsible for daily operations and the bottom line. Mr. Cassidy has held a series of senior leadership positions in revenue cycle management.
For the last fifteen years, he was the Administrative Director at Staten Island University Hospital, where he led one of the premier revenue cycle operations in the Tri-State area. Previously, he led similar areas at St. Luke’s/Roosevelt Hospital Center and NYU Medical Center. He holds a BA degree in History from Manhattan College and an MBA in Finance from the Rutgers University Graduate School of Management.
Sandra Chilcote, Vice President, Anesthesia Services
Ms. Chilcote is a widely known expert on anesthesiology billing and practice management. She works with AHS clients and prospects to improve payer contracts, collections procedures, and accounts receivable.
As the founder of the Professional Billing and Management Services (PBMS) company, Ms. Chilcote successfully supported many anesthesia and pain management practices. She has extensive knowledge of medical billing for anesthesia, pain management and ambulatory surgery centers. Ms. Chilcote participates in many healthcare related organizations and is a member of a Medicare Provider Education and Training Committee.
 Mr. Gilbert has extensive experience growing high-tech organizations by building and expanding customer focus. At AHS, he is responsible for all aspects of marketing and product management.
Until recently, Mr. Gilbert served as Vice President, Business Development for Vibrant Solutions, a provider of Business Intelligence analytics. Previously, he was a Partner at the Venture Consulting Group, a management consultancy helping high-tech companies grow. Earlier, he worked for AT&T, leading customer focused start-up initiatives, product development, and product management for business customers in the US and internationally.
Mr. Gilbert has attended advanced executive programs at Harvard Business School, INSEAD, and the Brookings Institute and has Bachelor of Science degrees in Mathematics and Computer Science from Iowa State University.
Michael Montemarano, Chief Financial Officer
 Mr. Montemarano has over 25 years experience as a Financial Executive. Before joining AHS, he was the CFO of a telecommunications equipment startup and successfully raised over $70M in equity, debt and strategic financing.
Mr. Montemarano has participated in the M&A work that led to the selection and successful integration of businesses in multiple industries and was the financial leader of the IPO for two telecommunications companies. He has a CPA and an MBA in Finance.
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