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Barbara Vander Weele

Ori Pomerantz has been securing computer networks--and teaching other people to do so--since 1995. Since joining IBM in 2003, he has written classes on several Tivoli® security products, including IBM Tivoli zSecure.


Barbara Vander Weele, a software engineer at IBM, has developed and presented education material on provisioning, security, storage, and business technologies for IBM Worldwide Education. 


Mark Nelson, Senior Software Engineer at IBM, is a twenty-year veteran of the RACF design team and a frequent speaker on RACF and z/OS security-related topics.


Tim Hahn, IBM Distinguished Engineer, has been with IBM for seventeen years. He is Chief Architect for Secure Systems and Networks within the IBM Software Group Tivoli organization.