Mainframe Performance Engineer

Job Description

DXC Technology (NYSE: DXC) helps global companies run their mission critical systems and operations while modernizing IT, optimizing data architectures, and ensuring security and scalability across public, private and hybrid clouds. The world’s largest companies and public sector organizations trust DXC to deploy services across the Enterprise Technology Stack to drive new levels of performance, competitiveness, and customer experience. Learn more about how we deliver excellence for our customers and colleagues at DXC.com.

Location: Remote (Canada)

Essential Job Functions

• Maintain and control performance data collection infrastructure including TDS, RMF, CMF, MICS, MXG, SAS, and DB2 jobs
• Collect and analyze system performance data using tools such as SYSVIEW, RMF, and MICS
• Produce regular capacity and utilization reports, including detailed forecasting of CPU utilization and workload growth
• Maintain and update a comprehensive Capacity Plan to support enterprise resource planning
• Monitor and tune real-time performance of system resources, ensuring stability and throughput efficiency
• Support workload management planning by reviewing and implementing WLM policy changes using IBM WLM ISPF tools
• Evaluate and customize job initiators, batch job structures, and started tasks according to WLM policy for new and existing systems in a Parallel Sysplex environment
• Review workload delay data and performance metrics to identify root causes and recommend remediation
• Maintain key OS performance parameters and make proactive adjustments to optimize resource utilization
• Customize, test, and maintain performance monitoring tools and automation logic
• Run IBM and CA SCRT (Sub-Capacity Reporting Tool) processes to support software billing
• Provide performance support during OS upgrades, system changes, and disaster recovery exercises
• Contribute to Business Continuity Planning and execution, including participation in DR drills
• Respond to and resolve day-to-day performance requests and service inquiries
• Collaborate with global teams to share best practices and improvements in performance monitoring and capacity planning
  
  

Technical Expertise

• Deep experience with mainframe performance monitoring and data collection tools such as RMF, CMF, TDS, MICS, MXG, SAS, and SYSVIEW
• Expertise in WLM configuration and impact assessment in z/OS Parallel Sysplex environments
• Proficiency in SCRT processing for both IBM and CA billing compliance
• Solid understanding of z/OS system internals, batch structures, and initiator class management
• Strong troubleshooting and diagnostic skills, including analysis of delay data and system logs
• Familiarity with forecasting techniques and workload growth modeling
  
  

Other Qualifications

• Strong analytical skills with the ability to interpret complex performance data and recommend actionable changes
• Ability to work independently and prioritize across multiple concurrent tasks
• Excellent communication and documentation skills to effectively collaborate with cross-functional and global teams
• Exposure to business continuity practices and disaster recovery planning
• Comfortable working in a high-availability environment with 24x7 support expectations
• Familiarity with ITIL-aligned incident and change management practices
  
  

Work Environment

• Fully remote role with scheduled and ad hoc on-call responsibilities as part of a rotating 24x7 support model
• Collaboration with global performance and capacity teams, infrastructure architects, and system administrators
• Requires flexible hours to support system changes, performance tuning efforts, and DR testing
  
  

DXC is an equal opportunity employer. We welcome the many dimensions of diversity. Accommodation of special needs for qualified candidates may be considered within the framework of the DXC Accommodation Policy.

In addition, DXC Technology is committed to working with and providing reasonable accommodation to qualified individuals with physical and mental disabilities. If you need assistance in filling out the employment application or require a reasonable accommodation while seeking employment, please e-mail AODA Canada Requests.

Note: This option is reserved for applicants needing a reasonable accommodation related to a disability.

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