New York

Eric H. Sillman brings key insights and contacts to portfolio companies given his experience with a variety of companies from the early stages to exits. He is actively engaged with many of Aperture's portfolio companies and was closely involved with Aperture's successful exits. Prior to Aperture, Eric worked in a variety of professional services capacities. At UBS, he executed merger and acquisition, equity and debt transactions. At The Parthenon Group, he helped companies assess expansion strategies and e-commerce initiatives. At TechnoServe, he assisted early stage companies with market analyses, financial management and organizational structures. He serves on the Board of Agora Partnerships and on TechnoServe's Global Advisory Council. He received his M.B.A. from Harvard Business School and B.A. from Brown University.

Tony Natale, M.D. blends his extensive business, investment and company formation experience with a background in clinical medicine. Dr. Natale has invested across a number of therapeutic areas, including orthopedics, ENT, ophthalmology, GI, minimally invasive technologies, robotics and women’s health. A committed board member, Dr. Natale works alongside entrepreneurs to build out management teams, establish effective corporate governance and bring operational discipline to R&D and early commercialization efforts. Dr. Natale was previously with Prism Ventures and MDS Capital where he made and managed investments in the medical technology sector. He has been a founder, director and/or lead investor of several venture-backed life sciences companies, including Mako Surgical. Dr. Natale trained in General Surgery and Otolaryngology/Head and Neck Surgery at the University of Connecticut and Hartford Hospital and held clinical appointments in Hartford area hospitals before transitioning into entrepreneurial activities. He holds a B.A., Phi Beta Kappa, from the University of Virginia, an M.D. from the University of Florida College of Medicine and an M.B.A. from Yale University’s School of Management.

Paul E. Tierney, Jr. has been a highly respected global investment professional for over thirty years. His experience and relationships help Aperture’s portfolio companies in a variety of valuable ways (strategy, capital raising, M&A, business development, corporate governance). Prior to Aperture, Paul was a co-founding principal of Gollust, Tierney and Oliver, the general partner for Coniston Partners which was a $1 billion active value investment partnership that generated superior returns. He served as an Adjunct Professor at Columbia Business School teaching courses on private equity. He received his M.B.A. as a Baker Scholar from Harvard Business School and a B.A. with high honors from the University of Notre Dame.

Thomas P. Cooper, M.D. is a nationally recognized healthcare entrepreneur, having used his medical training and business experience to found and manage several companies which have become the national leaders in their respective fields and generated $2 billion in revenues. He helps Aperture’s portfolio companies with operational matters as they grow and provides customer introductions. Companies that Tom has founded and managed include a national emergency physician company (Spectrum Emergency Care: Acquired by Laidlaw, Inc.), the largest correctional facility healthcare company (Correctional Medical Services) and the largest provider of X-Ray/EKG to nursing homes (Mobilex USA: Acquired by Integrated Health Services). These companies have had combined revenues of over $2 billion, serve over five thousand facilities, are located in all 50 states and reach more than four million patients. He received his M.D. from Indiana University and his B.A. from DePauw University.