Mr. Leonard A. Osser is a Founder of Milestone Scientific Inc. and has been Managing Director of China Operations since July 10, 2017. Mr. Osser served as the Chief Executive Officer at Milestone Medical, Inc. since March, 2011 until July 2017. Mr. Osser formed Milestone Medical. He serves as an Advisor at Quark Ventures S.A. and was previously a Member of Advisory Board of the firm. He served as the Chief Executive Officer at Milestone Scientific Inc. from September 2009 to July 10, 2017. He served as an Interim Chief Executive Officer at Milestone Scientific Inc. since March 27, 2009. He served as the Chief Executive Officer at Milestone Scientific Inc. from July 1991 to January 2008. He served as the Chief Executive Officer and Chairman of the Board of Advanced Ocular Sciences S.A. from 1991 to 2007. Mr. Osser served as the President at Spintech since November 1995. Mr. Osser served as Chief Executive Officer at Spintech from November 1995 to January 2008. From 1980 to November 1995, Mr. Osser was a Principal Owner and Chief Executive at U.S. Asian Consulting Group, Inc., where he focused on workout, distressed and turnaround situations in the medical, technology, retailing, resource recovery, waste disposal and securities industries. In the late 1980s, his work with U.S.-based investment banks and broker-dealers involved him in extensive due diligence and corporate finance work for small to mid-sized companies. He served as Chairman at Milestone Scientific Inc. from July 1991 to September 2009. He has been a Director at Milestone Scientific Inc. since July 1991. He served as a Director at Milestone Medical, Inc. since March, 2011 until October 19, 2017. He served as a Director of Advanced Ocular Sciences S.A. He developed a computer controlled system that delivers injections with scientific precision. He has finance and operating management experience with companies worldwide. Mr. Osser has a 28-year career in finance, consulting and operations management for companies around the world.