Christine Axnix IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (caxnixde.ibm.com). Ms. Axnix is a Senior Engineer in zSeries processor firmware development. She received the Dipl. Ing. degree in electrical engineering from the Berufsakademie, Stuttgart, Germany. In 1989 she joined the IBM development laboratories in Boeblingen, where she initially worked on S/390* processor and coupling architecture verification test programs. She has also worked on various S/390 and zSeries projects in the i390 code area, including hardware initialization and reset, the communication interface between support element and CEC, capacity on demand, and initial firmware load and concurrent firmware maintenance for System z9. Ms. Axnix is currently leading the design for the capacity-on-demand functions for the IBM System z9 follow-on project.

Torsten Hendel IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (hendeltde.ibm.com). Mr. Hendel studied software engineering at the University of Stuttgart and graduated with an M.A. degree in computer science. He works in zSeries processor firmware development in the areas of i390 kernel functions, virtualization, and SCLP. Mr. Hendel is currently the leader of GPL8 development and has responsibility for the PL8 front end and firmware-specific back end.

Michael Mueller IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (mulmde.ibm.com). Mr. Mueller is a Distinguished Engineer responsible for the platform architecture and design of the reliability, availability, and serviceability of IBM iSeries*, pSeries*, and zSeries eServers. He studied electrical engineering at the University of Stuttgart, receiving his Dipl. Ing. degree in 1985. He joined IBM that same year, working in the S/370* Product Assurance Test Laboratory at Boeblingen. Mr. Mueller has held various positions in S/390 microcode development and system design.

Angel Nuñez Mencias IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (anunezde.ibm.com). Mr. Nuñez Mencias received an Ingenieur degree in telecommunications from the Polytechnic University of Madrid and an M.S. degree in electrical engineering and computer science from the University of Stuttgart in 2004. He completed an M.B.A. degree from the National University of Distance Education in 2005. He joined IBM in 2002 and has worked on i390-related projects, including the ELF loader and the GPL8 compiler.

Hartmut Penner IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (hpennerde.ibm.com). Mr. Penner studied computer science at the University of Kaiserslautern and graduated in 1996 with an M.S. degree, joining IBM that same year. He worked on the development of the zSeries back end for GCC and is working on the Linux port for zSeries. Mr. Penner is currently working on a firmware stack for high-volume power systems.

Stefan Usenbinz IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (usenbinzde.ibm.com). Mr. Usenbinz is an Advisory Engineer in zSeries Processor Firmware Development. After studying at the University of Cooperative Education Stuttgart, he became a graduate engineer and joined the IBM development laboratories in Boeblingen in 1997. He has worked in the area of RAS and is currently leading the design for the service element–CEC communication interface for the next-generation zSeries systems.

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