Biographical Sketch: Over 35+ years Technical IT experience, with a broad range of skills, the majority of which was gained in hands-on technical roles, performing a variety of duties in diverse and complex environments. The majority of Mark’s experience is focused on IBM mainframe systems, where he performs as an Architect, Technician and Project Manager. Mark’s specialist subject is IT Security, in particular z/OS and associated subsystem (CICS, DB2, MQ, etc) security with RACF, ACF2 or Top Secret installed. Mark has recently been awarded several best speaker awards at: • SHARE in the USA • Vanguard Security Conference in the USA • GSE UK Annual conference Mark is also an active member of the GSE community – currently Chairman of the GSE Large Systems Working Group and Technical Co-Coordinator of the GSE Enterprise Security working group