Dr Stephen Castell CITP, Medallist, IT Consultant of the Year, is a leading forensic expert witness acting in computer software and systems disputes, including the largest and longest software development cases to have reached the English High Court and the Sydney Supreme Court; and increasingly involved as an expert witness in cryptocurrency and digital assets disputes.

Dr. Lavian specializes in telecommunications, network communications, and Internet protocols, including computer networks, data communications, routing, switching, LAN/WAN, Ethernet, TCP/IP, UDP, VPN, VoIP, mobile wireless, streaming media, Chat, SMS, Internet, and web technologies. Extensive testifying experience in Federal, IPR, and ITC. Named inventor on over 120 issued and filed patents.

Expert background in laboratory research, organic chemistry and pharmaceutical development.

Over 40 years experience in the medical device industry, including serving as CEO of 6 medical device companies in four countries. Inventor of over 35 US patents. Experienced expert witness - reports, depositions and court appearances.
Has been member of board of directors of 12 companies (public and private), and currently Chairman of the Board of 4 companies, and member of the board of one other.
Has brought many medical devices to market through engineering design, clinical trials, regulatory approvals, and market launch.