John Leiseboer


Leadership Team


John Leiseboer

Chief Technology Officer

John Leiseboer is founding CTO at QuintessenceLabs Pty Ltd, and is responsible for the research, design, and development of key management, comsec, and infosec products. He is a member of the OASIS KMIP and PKCS11 Technical Committees, and has contributed to the development of NIST, IETF, and IEEE standards, including SP 800-90B and C, and IEEE 802.6. John has worked in the fields of communications and information security for over 35 years, designing and architecting commercial and military communications and information security hardware, software, and systems. He has experience in applying conventional, classical cryptography as well as leading-edge quantum key distribution technology to innovative security product designs.

Prior to joining QuintessenceLabs, John held senior positions in a number of technology companies working in commercial and military sectors, including RSA/EMC, Boeing, HP, and Plessey Defence Systems. John obtained his Bachelor of Electrical Engineering from the University of Sydney in 1979, specializing in electronics, communications, and digital systems.