Biographical sketches of authors

Richard Guski   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (electronic mail: guski@us.ibm.com). Mr. Guski is an IBM Senior Technical Staff Member focusing on zSeries security design and architecture. He began his career in 1971 with the Mountain Bell Telephone Company (now QWEST) in Denver, Colorado. He joined IBM in 1981 as a programmer in RACF development, where he participated in the design and development of many versions of RACF. He holds a patent on security-related software technology and he has other patents pending. He is a CISSP (certified information systems security professional), certified by the International Information Systems Security Consortium, Inc. Mr. Guski received a B.S. degree in computer technology from the New York Institute of Technology in 1971.

John C. Dayka   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (electronic mail: dayka@us.ibm.com). Mr. Dayka is an IBM Senior Technical Staff Member. He has worked on the S/390 platform since joining IBM in 1985. He is currently a design team leader and system architect with primary focus on security for both zSeries and z/OS. Mr. Dayka is a graduate of Mount Saint Mary College in Newburgh, New York. He holds a bachelor's degree in computer science.

Linda N. Distel   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (electronic mail: ldistel@us.ibm.com). Ms. Distel is the program director for cross brand technologies within the Enterprise Server Group. This position includes security strategy and investment planning for z/OS and zSeries platform security. She joined IBM as a programmer in 1983 and has held a number of technical and management positions in S/390 hardware and software development. She is a graduate of the State University of New York at Albany, with a bachelor's degree in computer science and mathematics. Ms. Distel holds a master's degree in computer science from Marist College.

Walter B. Farrell   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (electronic mail: wfarrell@us.ibm.com). Mr. Farrell has worked for IBM since 1984, first in design and development for the RACF security product for MVS/ESA and VM/ESA, and subsequently for its follow-on, the Security Server (SecureWay Security Server) for OS/390 and z/OS. He has recently received CISSP certification. Prior to joining IBM, he spent several years as a lead systems programmer for a large IBM banking customer that used both MVS and RACF, and he worked closely with the data security department helping to implement the necessary security controls using RACF. Mr. Farrell holds a master's degree in computer science from Rensselaer Polytechnic Institute in Troy, New York. His bachelor's degree is in mathematics, from the California Institute of Technology in Pasadena, California.

Karen A. Gdaniec   IBM Server Group, 1701 North Street, Endicott, New York 13760 (electronic mail: kgdaniec@us.ibm.com). Ms. Gdaniec works for IBM within the DCE and Ecommerce Development group and has been the team leader for OS/390 directory development since October 1996. Her team is responsible for DCE's cell directory service as well as the LDAP products. She has worked for IBM since 1983 in a number of positions, including application development, management, marketing support, and product development. Ms. Gdaniec holds a master's degree in computer science from Marist College in Poughkeepsie, New York. Her bachelor's degree is also in computer science, from Indiana University of Pennsylvania.

Michael J. Kelly   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (electronic mail: kellymj@us.ibm.com). Mr. Kelly works for IBM on S/390 cryptographic software design, development, and service. He joined IBM in 1980 and has held assignments in JES2/MVS system test and in product development for cryptographic products. He is currently a senior software engineer in the Integrated Cryptographic Support Facility (ICSF) development organization, where he has been a lead designer since the product was started in 1987. Prior to joining IBM, Mr. Kelly worked as a cryptologic mathematician for the U.S. Department of Defense. He holds a master's degree in mathematics from Syracuse University.

Mark A. Nelson   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (electronic mail: markan@us.ibm.com). Mr. Nelson works in RACF development focusing on design and special projects. He has recently received CISSP certification. His career with IBM began in 1982 and has included assignments in RACF management and marketing support. He was design owner for the RACF component of the OS/390 release 8 Security Server. He was designer and developer for the RACF Database Unload Utility, the RACF SMF Unload Utility, and designer for the RACF Remove ID Utility. His other design assignments have included work on RACF's support for IBM's Component Broker product. He is an active speaker and writer on RACF, presenting talks to IBM employees and customers on four continents and publishing numerous articles in Technical Support magazine. Mr. Nelson received his bachelor's degree in computer science and electrical engineering from the Polytechnic Institute of New York and his master's degree in information systems from Marist College.

Linwood H. Overby   IBM Application Integration Middleware Division, 4205 South Miami Boulevard, Research Triangle Park, North Carolina 27709 (electronic mail: overbylh@us.ibm.com). Mr. Overby is a senior software engineer in the z/OS Communications Server strategy and design area, focusing on SNA and TCP/IP security. He joined IBM in 1978 and worked on several IBM networking products before his current assignment. He has been the lead designer for the Communications Server on numerous security functions, including IPSec, TN3270 SSL, and Intrusion Detection Services. He holds five U.S. patents and currently has 17 additional patent applications pending. Mr. Overby received a B.A. in economics and business administration from North Carolina State University in 1977.

Linwood G. Robinson   IBM Server Group, 999 Waterside Drive, Norfolk, Virginia 23510 (electronic mail: linwood@us.ibm.com). Mr. Robinson's current assignment is with OS/930 Security Marketing Programs, where he is the marketing manager for Enterprise Systems security, cryptography and directory. His responsibilities include preparing marketing information for customers and IBM sales teams, meeting with customers to understand their requirements, and helping validate future development directions. Prior to this assignment, he worked in IBM sales covering large systems hardware, software, storage, systems management, and security. Mr. Robinson has worked for IBM since 1967 in a variety of positions, including operating systems development, management, sales, and marketing support. He holds a bachelor's degree in electrical engineering from Massachusetts Institute of Technology in Cambridge, Massachusetts.