z/OS System Programmer | Mainframe Operations Engineer
Aktualisiert am 02.10.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 01.11.2026
Verfügbar zu: 100%
davon vor Ort: 0%
Administration z/OS
SMP/E
DFSMSrmm
DFSMShsm
TSO
ISPF
USS
Parallel Sysplex
TCP/IP
RACF
RMF
Tape-Library
ETERNUS
IBM IHS
CA-1
HMC/LPAR
English
Fortgeschritten
Polish
Muttersprache

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

3 years 9 months
2023-01 - now

Plan and implement z/OS upgrades

Software Principal Engineer, z/OS System Programmer IBM z15 IBM z16 IBM z17 ...
Software Principal Engineer, z/OS System Programmer

  • Administer and maintain large-scale IBM Mainframe environments running on IBM z15, z16 and z17 servers (100+ LPARs across Dev, Test, and Prod running z/OS & z/VM)
  • Plan and implement z/OS upgrades and monthly maintenance installations (RSU/PUT) using z/OSMF and SMP/E
  • Implement I/O and hardware (IODF/IOCDS) configuration changes using HCD; provide technical support for CEC and hardware migration projects
  • Manage storage and backup operations using DFSMS, DFRMM, and Dell DLM; monitor CPU utilization and workloads using SMF and RMF
  • Administer RACF database (define/change user, resource and dataset profiles)
  • Install and maintain third-party products, including XDC and the BMC FDR product family
  • Develop and maintain operational procedures for system maintenance, upgrades, and infrastructure changes

IBM z15 IBM z16 IBM z17 z/OS z/VM z/OSMF SMP/E HCD DFSMS DFRMM Dell DLM SMF RMF RACF XDC BMC FDR
Dell Technologies
8 months
2025-10 - 2026-05

z/OS 3.2 deployment in user environment

z/OS System Programmer z/OSMF SMP/E
z/OS System Programmer
z/OS 3.2 initial installation (shopz order, zOSMF workflows) and user's lpars upgrade. 
z/OS
z/OSMF SMP/E
Dell Technologies
11 months
2025-01 - 2025-11

Mainframe modernization and consolidation

z/OS System Programmer HCD IODF/IOCDS HMC
z/OS System Programmer
Major project to consolidate and reduce mainframe footprint to a large and more powerful 2 CPU configuration
IBM z/17
HCD IODF/IOCDS HMC
Dell Technologies
3 months
2024-03 - 2024-05

Backup to VTAPE implementation (DFRMM, DLM 8800)

z/OS System Programmer DFRMM
z/OS System Programmer
Build from scratch z/OS backup strategy and policies using DFSMS/DFRMM structures and DLM 8800 virtual tape environment
Dell DLM z/OS
DFRMM
Dell Technologies
5 years 3 months
2017-11 - 2023-01

Led system integration and verification for FICON interfaces

Lead QA Specialist | Mainframe Specialist z/OS IBM z12 IBM z13 ...
Lead QA Specialist | Mainframe Specialist
  • Managed IBM Mainframe hardware and software test and dev infrastructure (z/OS, IBM z12/z13 servers, storage systems, virtual tape libraries)
  • Led system integration and verification for FICON interfaces and virtual tape libraries (VTL) for z/OS
  • Coordinated technical projects and cross-functional team management while ensuring mainframe environment stability
z/OS IBM z12 IBM z13 FICON VTL
Fujitsu Technology Solutions
10 months
2017-02 - 2017-11

Administered z/OS environments and configured tape management software

Expert QA Engineer, Mainframe Specialist z/OS CA-1 CA-TLMS ...
Expert QA Engineer, Mainframe Specialist
  • Administered z/OS environments and configured tape management software (CA-1, CA-TLMS, CA-MIM, DFRMM, Sun ELS, Eternus z/OS LINK)
  • Provided advanced customer support and performed integration, compatibility, and regression testing for interfaces between z/OS and virtual tape systems
z/OS CA-1 CA-TLMS CA-MIM DFRMM Sun ELS Eternus z/OS LINK
Fujitsu Technology Solutions
2 years 2 months
2015-01 - 2017-02

Administered z/OS environments and configured tape management software

Senior QA Engineer | Mainframe Specialist z/OS CA-1 CA-TLMS ...
Senior QA Engineer | Mainframe Specialist
  • Administered z/OS environments and configured tape management software (CA-1, CA-TLMS, CA-MIM, DFRMM, Sun ELS, Eternus z/OS LINK)
  • Performed integration, compatibility, and regression testing for interfaces between z/OS and virtual tape systems
z/OS CA-1 CA-TLMS CA-MIM DFRMM Sun ELS Eternus z/OS LINK
Fujitsu Technology Solutions
1 year 2 months
2013-11 - 2014-12

Installed, configured, and maintained BMC products

Mainframe Specialist BMC MainView for CICS BMC MainView for Db2 AutoOPERATOR ...
Mainframe Specialist
  • Installed, configured, and maintained BMC products, including MainView for CICS and Db2, AutoOPERATOR, APPTUNE, and Catalog Manager
  • Administered CICS subsystems and performed performance monitoring and tuning
BMC MainView for CICS BMC MainView for Db2 AutoOPERATOR APPTUNE Catalog Manager CICS
Asseco Poland S.A.
8 years 5 months
2005-07 - 2013-11

Supported the daily operation of production systems

z/OS System Specialist OS/390 z/OS IBM z9 ...
z/OS System Specialist
  • Administered enterprise mainframe environments running OS/390 and z/OS on IBM z9, z10, and z114 servers
  • Managed DS8000 storage systems and supported the availability and continuity of production infrastructure
  • Planned and implemented system, storage, and network infrastructure changes
  • Supported the daily operation of production systems and acted as deputy manager of the z/OS system department
OS/390 z/OS IBM z9 IBM z10 IBM z114 DS8000
ZETO S.A.
3 years
2002-07 - 2005-06

Monitor the daily operation of production systems

Junior System Operator OS/390 z/OS
Junior System Operator

Monitor the daily operation of production systems, batch workflow and backups processing

OS/390 z/OS
ZETO S.A.

Aus- und Weiterbildung

Aus- und Weiterbildung

5 years 8 months
1998-10 - 2004-05

IT Studies

Master of Science, Academy of Humanities and Economics in ?ód?
Master of Science
Academy of Humanities and Economics in ?ód?

Position

Position

  • Mainframe Engineer
  • z/OS System Programmer

Kompetenzen

Kompetenzen

Top-Skills

Administration z/OS SMP/E DFSMSrmm DFSMShsm TSO ISPF USS Parallel Sysplex TCP/IP RACF RMF Tape-Library ETERNUS IBM IHS CA-1 HMC/LPAR

Produkte / Standards / Erfahrungen / Methoden

Profile

Senior z/OS System Programmer with over 20 years of experience supporting IBM Mainframe infrastructure, z/OS administration, hardware configuration, system maintenance, storage, security and performance monitoring. Experienced in managing enterprise environments (100+ LPARs across dev/test/prod) on IBM z hardware.


TECHNICAL SKILLS

Operating Systems & Core:

  • z/OS, z/VM, z/OSMF
  • SMP/E
  • HCD
  • DFSMS
  • JES2
  • JCL
  • TSO/ISPF
  • SDSF
  • OMVS
  • SYSPLEX
  • z/OS HTTP Server
  • TCPIP
  • VTAM
  • ATTLS


Backup:

  • DFRMM
  • DFHSM
  • CA-1
  • CA-TLMS


Security & Performance:

  • RACF
  • SMF
  • RMF
  • capacity and performance monitoring


Hardware & Infrastructure:

  • IBM z servers
  • FICON
  • Fujitsu ETERNUS
  • Dell DLM
  • HMC


DevOps & Collaboration:

  • JIRA
  • Confluence
  • Slack
  • Git
  • ZIGI
  • Copilot
  • Devin

Betriebssysteme

z/OS
z/VM

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

3 years 9 months
2023-01 - now

Plan and implement z/OS upgrades

Software Principal Engineer, z/OS System Programmer IBM z15 IBM z16 IBM z17 ...
Software Principal Engineer, z/OS System Programmer

  • Administer and maintain large-scale IBM Mainframe environments running on IBM z15, z16 and z17 servers (100+ LPARs across Dev, Test, and Prod running z/OS & z/VM)
  • Plan and implement z/OS upgrades and monthly maintenance installations (RSU/PUT) using z/OSMF and SMP/E
  • Implement I/O and hardware (IODF/IOCDS) configuration changes using HCD; provide technical support for CEC and hardware migration projects
  • Manage storage and backup operations using DFSMS, DFRMM, and Dell DLM; monitor CPU utilization and workloads using SMF and RMF
  • Administer RACF database (define/change user, resource and dataset profiles)
  • Install and maintain third-party products, including XDC and the BMC FDR product family
  • Develop and maintain operational procedures for system maintenance, upgrades, and infrastructure changes

IBM z15 IBM z16 IBM z17 z/OS z/VM z/OSMF SMP/E HCD DFSMS DFRMM Dell DLM SMF RMF RACF XDC BMC FDR
Dell Technologies
8 months
2025-10 - 2026-05

z/OS 3.2 deployment in user environment

z/OS System Programmer z/OSMF SMP/E
z/OS System Programmer
z/OS 3.2 initial installation (shopz order, zOSMF workflows) and user's lpars upgrade. 
z/OS
z/OSMF SMP/E
Dell Technologies
11 months
2025-01 - 2025-11

Mainframe modernization and consolidation

z/OS System Programmer HCD IODF/IOCDS HMC
z/OS System Programmer
Major project to consolidate and reduce mainframe footprint to a large and more powerful 2 CPU configuration
IBM z/17
HCD IODF/IOCDS HMC
Dell Technologies
3 months
2024-03 - 2024-05

Backup to VTAPE implementation (DFRMM, DLM 8800)

z/OS System Programmer DFRMM
z/OS System Programmer
Build from scratch z/OS backup strategy and policies using DFSMS/DFRMM structures and DLM 8800 virtual tape environment
Dell DLM z/OS
DFRMM
Dell Technologies
5 years 3 months
2017-11 - 2023-01

Led system integration and verification for FICON interfaces

Lead QA Specialist | Mainframe Specialist z/OS IBM z12 IBM z13 ...
Lead QA Specialist | Mainframe Specialist
  • Managed IBM Mainframe hardware and software test and dev infrastructure (z/OS, IBM z12/z13 servers, storage systems, virtual tape libraries)
  • Led system integration and verification for FICON interfaces and virtual tape libraries (VTL) for z/OS
  • Coordinated technical projects and cross-functional team management while ensuring mainframe environment stability
z/OS IBM z12 IBM z13 FICON VTL
Fujitsu Technology Solutions
10 months
2017-02 - 2017-11

Administered z/OS environments and configured tape management software

Expert QA Engineer, Mainframe Specialist z/OS CA-1 CA-TLMS ...
Expert QA Engineer, Mainframe Specialist
  • Administered z/OS environments and configured tape management software (CA-1, CA-TLMS, CA-MIM, DFRMM, Sun ELS, Eternus z/OS LINK)
  • Provided advanced customer support and performed integration, compatibility, and regression testing for interfaces between z/OS and virtual tape systems
z/OS CA-1 CA-TLMS CA-MIM DFRMM Sun ELS Eternus z/OS LINK
Fujitsu Technology Solutions
2 years 2 months
2015-01 - 2017-02

Administered z/OS environments and configured tape management software

Senior QA Engineer | Mainframe Specialist z/OS CA-1 CA-TLMS ...
Senior QA Engineer | Mainframe Specialist
  • Administered z/OS environments and configured tape management software (CA-1, CA-TLMS, CA-MIM, DFRMM, Sun ELS, Eternus z/OS LINK)
  • Performed integration, compatibility, and regression testing for interfaces between z/OS and virtual tape systems
z/OS CA-1 CA-TLMS CA-MIM DFRMM Sun ELS Eternus z/OS LINK
Fujitsu Technology Solutions
1 year 2 months
2013-11 - 2014-12

Installed, configured, and maintained BMC products

Mainframe Specialist BMC MainView for CICS BMC MainView for Db2 AutoOPERATOR ...
Mainframe Specialist
  • Installed, configured, and maintained BMC products, including MainView for CICS and Db2, AutoOPERATOR, APPTUNE, and Catalog Manager
  • Administered CICS subsystems and performed performance monitoring and tuning
BMC MainView for CICS BMC MainView for Db2 AutoOPERATOR APPTUNE Catalog Manager CICS
Asseco Poland S.A.
8 years 5 months
2005-07 - 2013-11

Supported the daily operation of production systems

z/OS System Specialist OS/390 z/OS IBM z9 ...
z/OS System Specialist
  • Administered enterprise mainframe environments running OS/390 and z/OS on IBM z9, z10, and z114 servers
  • Managed DS8000 storage systems and supported the availability and continuity of production infrastructure
  • Planned and implemented system, storage, and network infrastructure changes
  • Supported the daily operation of production systems and acted as deputy manager of the z/OS system department
OS/390 z/OS IBM z9 IBM z10 IBM z114 DS8000
ZETO S.A.
3 years
2002-07 - 2005-06

Monitor the daily operation of production systems

Junior System Operator OS/390 z/OS
Junior System Operator

Monitor the daily operation of production systems, batch workflow and backups processing

OS/390 z/OS
ZETO S.A.

Aus- und Weiterbildung

Aus- und Weiterbildung

5 years 8 months
1998-10 - 2004-05

IT Studies

Master of Science, Academy of Humanities and Economics in ?ód?
Master of Science
Academy of Humanities and Economics in ?ód?

Position

Position

  • Mainframe Engineer
  • z/OS System Programmer

Kompetenzen

Kompetenzen

Top-Skills

Administration z/OS SMP/E DFSMSrmm DFSMShsm TSO ISPF USS Parallel Sysplex TCP/IP RACF RMF Tape-Library ETERNUS IBM IHS CA-1 HMC/LPAR

Produkte / Standards / Erfahrungen / Methoden

Profile

Senior z/OS System Programmer with over 20 years of experience supporting IBM Mainframe infrastructure, z/OS administration, hardware configuration, system maintenance, storage, security and performance monitoring. Experienced in managing enterprise environments (100+ LPARs across dev/test/prod) on IBM z hardware.


TECHNICAL SKILLS

Operating Systems & Core:

  • z/OS, z/VM, z/OSMF
  • SMP/E
  • HCD
  • DFSMS
  • JES2
  • JCL
  • TSO/ISPF
  • SDSF
  • OMVS
  • SYSPLEX
  • z/OS HTTP Server
  • TCPIP
  • VTAM
  • ATTLS


Backup:

  • DFRMM
  • DFHSM
  • CA-1
  • CA-TLMS


Security & Performance:

  • RACF
  • SMF
  • RMF
  • capacity and performance monitoring


Hardware & Infrastructure:

  • IBM z servers
  • FICON
  • Fujitsu ETERNUS
  • Dell DLM
  • HMC


DevOps & Collaboration:

  • JIRA
  • Confluence
  • Slack
  • Git
  • ZIGI
  • Copilot
  • Devin

Betriebssysteme

z/OS
z/VM

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