At Greenwich Biosciences, all colleagues share a passion for the work we do. We bring years of experience in researching, developing and commercializing novel, breakthrough therapies and are driven by the determination to bring these life-changing medicines to those who need them most.

Our People

Executive Bios

Justin Gover

Justin Gover

Chief Executive Officer

Justin Gover has served as Chief Executive Officer of GW Pharmaceuticals plc since January 1999, shortly after the company was founded. He has 21 years of experience in the pharmaceutical industry.

As Chief Executive Officer, Mr. Gover has been the lead executive responsible for the running of the company’s operations, leading equity financings and business development activities. He raised initial rounds of private capital, following which led the company’s initial public offering on the AIM stock exchange in London in 2001, and more recently led GW’s initial public offering on Nasdaq in 2013. In total, he has led equity financing rounds which have raised approximately $900 million.

In 2015, Mr. Gover relocated to the US to open the company’s US headquarters in California.

Prior to joining GW, Mr. Gover was Head of Corporate Affairs at Ethical Holdings plc, a UK-based Nasdaq listed company, where he was responsible for the company’s strategic corporate activities, including mergers and acquisitions, strategic investments, equity financings, and investor relations.

Mr. Gover holds an MBA. from the INSEAD business school in France and a BSc (Hons) from Bristol University.
 

Darren Cline

Darren Cline

U.S. Chief Commercial Officer

Darren Cline serves as U.S. Chief Commercial Officer since his appointment in April, 2019. Mr. Cline is a highly experienced U.S. commercial leader and senior executive with a background specializing in rare disease.

He has over 25 years of commercial experience, and was previously Executive Vice President, Commercial and a member of the Executive Committee at Seattle Genetics, where he oversaw all marketing, sales, and managed markets functions. He was directly involved in the commercial build out for the U.S. launch of Adcetris. Mr. Cline was instrumental in driving Adcetris’ continued revenue growth to over $475 million in 2018. Prior to Seattle Genetics, Mr. Cline was at Alexion Pharmaceuticals, where he was a key member of the initial commercial leadership team that prepared the company for the Soliris launch, helping to build out key sales functions that were instrumental in Soliris becoming a billion-dollar brand. Mr. Cline also held commercial leadership positions at Intermune and Amgen.

Mr. Cline received his undergraduate degree from San Diego State University and his MBA from Pepperdine University.

Scott Giacobello

Scott Giacobello

Chief Financial Officer

Scott Giacobello brings 25 years of finance and operational experience to GW Pharmaceuticals plc. He is an accomplished executive who most recently, and until its acquisition by Allergan, Inc. in late 2016, served as Chief Financial Officer for Chase Pharmaceuticals Corporation, a clinical-stage biopharmaceutical company focused on the development and commercialization of improved treatments for neurodegenerative disorders.

From 2008 through 2015, Mr. Giacobello held senior level finance positions at Allergan, Inc., most recently serving as Vice President of Finance for Global Research & Development. While at Allergan, he also served as Vice President of Corporate Finance and Vice President of Internal Audit & Compliance. 

Scott’s previous experience includes financial positions at the Black & Decker Corporation and Ernst & Young, LLP. Mr. Giacobello holds a bachelor’s degree in business administration from the University of Notre Dame and is a Certified Public Accountant.  
 

Volker Knappertz

Dr. Volker Knappertz

Chief Medical Officer

Dr. Volker Knappertz has served as our Chief Medical Officer since May 2017. Dr. Knappertz has over 25 years of clinical trial experience and 17 years of pharmaceutical drug development experience, holding leadership positions with responsibilities for managing international clinical trial and medical affairs programs.

Most recently, as the Vice President of clinical development for multiple sclerosis, oncology, and biosimilar products at Teva Pharmaceuticals, Dr. Knappertz oversaw multiple regulatory submissions and approvals in the US, Canada, Europe, and Japan. Prior to joining Teva in 2012, Dr. Knappertz served in clinical and medical roles Central Nervous System, Cardiovascular, and biologics at Bayer Pharmaceuticals and AstraZeneca. 

Dr. Knappertz is a US Board certified neurologist who received his residency training at Yale University, New Haven, CT, where he served as chief resident and was fellowship trained at Wake Forest University, Winston-Salem, NC. He received his clinical scientist training and MD as well as a doctorate degree in research on glioblastoma from the University at Cologne in Germany. 
 

Douglas Snyder

Douglas Snyder

Chief Legal Officer

Douglas Snyder has served as GW Pharmaceuticals plc's Chief Legal Officer since July 2017. He brings more than 20 years of experience providing counsel in the pharmaceutical industry, at the Food and Drug Administration (FDA), and in private practice.

Prior to joining GW, Doug led the legal and compliance teams as Senior Vice President, General Counsel, and Secretary for Actelion US. Prior to that, Doug held the position of Senior Vice President, General Counsel, Secretary at Eisai Inc., where he led the Legal, Compliance, Legislative Affairs, Internal Audit and Security Group.  

From 1999-2005, Doug was Vice President, Associate General Counsel for GlaxoSmithKline. During his tenure at GSK, Doug managed the legal and communications strategies related to some of the company’s most high profile matters concerning the New York Attorney General, the US Department of Justice, and the FDA. 

Before joining the pharmaceutical industry, Doug held the role of Associate General Counsel for the FDA, where he counseled the Commissioner, appeared before Congress in key initiatives, and led the initial False Claims/Kickback cases against the pharmaceutical industry.

Tina St. Leger - Chief Human Resources Officer

Tina St. Leger

Chief Human Resources Officer

Tina St. Leger joined GW Pharmaceuticals as Chief Human Resources Officer (CHRO) in July 2019 and is responsible for the global human resources function. Tina joined GW after a 14-year tenure at GlaxoSmithKline (GSK), where she most recently served as VP HR for GSK Europe and Global Therapeutic Groups. In that role, she led change initiatives across Europe and the U.S. for the division that spans 30 countries and includes more than 5,000 employees.

She was also responsible for building GSK’s global oncology team in the U.S. and Europe. She previously held positions of increasing responsibility within the global HR function at GSK, including serving as VP HR for the Emerging Markets region and their branded generics business – which included 17,000 employees and operated in more than 100 countries – and VP HR for ViiV Healthcare – a global company that specializes in HIV. viiV Healthcare is a joint venture between Pfizer, Shionogi and GSK. Tina was the Global Head of HR and supported teams based in the US, Europe and developed Asia in the commercial, R&D, supply chain and medical affairs teams.

Tina brings 20 years of global human resources experience, including expertise in organizational design and learning and leadership development. Prior to GSK, she led Leadership and Development for the UK retailer Marks and Spencer having enjoyed an earlier career in both finance and R&D. Tina earned her Bachelor of Science in Chemistry from the University of St. Andrews.