Pharmaceuticals John Arthur F. De Silva Posted by Who's Who Site Administrator on June 7, 2018September 16, 2019 Most Recent Title: Pharmaceutical Executive, Researcher Company: Hoffmann-LaRoche, Inc. Industry: Pharmaceuticals Years in Industry: 57 Years affiliated with Marquis Who’s Who: 18 Contact John Arthur F. De Silva: Name(required) Email(required) Website Comment(required) Submit Δ Share this:TwitterFacebookLinkedInLike this:Like Loading...