Zelden is the z/OS Global Capability Manager for DXC Technology (formerly CSC / Computer Sciences
accomplished senior systems programmer and a
consultant with over 30 years of experience providing
solutions for corporate IT organizations. Mark is ITIL V3
certifed and is an industry recognized leader in the
MVS-OS/390-z/OS operating environment. He has a successful
track record as a consultant and systems programmer with
expertise in operating systems, Parallel Sysplex, security
software, (RACF, Top Secret, ACF2), JES2, SMP/E, Workload
Manager (WLM), networking (VTAM / NCP / TCPIP), DASD
management, system software installation and support -
including dozens of ISV software products, and technical
applications support. Mark also has expertise in mainframe
performance and tuning, capacity planning, technology
strategy and planning, and problem diagnosis/resolution.
His positions have required both independent, hands-on
involvement and project leadership / management, and his
strengths include a solid technical foundation coupled
with strong people and interpersonal skills.
Mark has authored utility programs that have been included on the CBT tape, his own web site, Mark's MVS Utilities, that is one of the most recommended sites in the industry, and articles for publications like Xephon's MVS Update magazine, TSO Times, and IBM Systems Magazine. Mark is the Systems Programming expert on the panel of S/390 experts for the "Ask The Experts" feature of search390.com and the TechTarget Expert Answer Center for OS/390 and z/OS operating systems.
Mark and his web site have been featured in SHARE presentations / sessions over the years like "Cherylís Hot Flashes" and "Fully Wired System Programmer" and also in industry publications like Cheryl Watson's Tuning Letter and IBM Systems Magazine in an article called "The Legend of Zelden".
In Mark's current role with DXC he is the z/OS team lead supporting one of DXC's largest commercial client and also member of a global technology, infrastructure and service management team responsible for the design, development, deployment and operational governance of the services delivered to both new and existing accounts in support of service offerings.