Senior Mainframe Performance and Capacity Specialist

Application Deadline: 10/30/2026 Address: 4100 Gordon Baker Road Job Family Group: Technology Drive Performance. Enable Stability. Power BMO's Future. At BMO, technology powers millions of customer interactions every day. We are seeking a highly skilled Senior Mainframe Performance & Capacity Management Specialist to play a critical role in ensuring the performance, reliability, and scalability of our enterprise mainframe environment. This is an exciting opportunity to join a team that supports mission-critical platforms that are foundational to BMO's business and customer experience. As a trusted technical expert, you will leverage your deep mainframe performance management expertise, analytical mindset, and investigative approach to identify trends, solve complex performance challenges, and drive operational excellence. You will collaborate across technology teams and business partners to optimize system performance, improve operational capabilities, and ensure service levels are consistently achieved.

What You'll Do
Mainframe Performance & Capacity Management
- Lead performance management activities across BMO's enterprise mainframe environment.
- Analyze system performance, identify trends, and proactively address potential capacity or performance concerns before they impact users.
- Utilize data-driven analysis and capacity modeling techniques to ensure environments remain scalable, resilient, and aligned with business growth.
- Investigate complex performance issues and apply creative, out-of-the-box thinking to identify root causes and implement sustainable solutions.
- Develop insights and recommendations through analysis of system metrics, utilization trends, and operational data.
- Understand and apply capacity modeling methodologies to support forecasting, strategic planning, and operational readiness. Production Support & Operations Excellence
- Provide expert support for mission-critical systems operating in a 24x7x365 environment.
- Lead the response, diagnosis, and resolution of production incidents, program failures, and system performance issues.
- Monitor system health, performance, logging, alerting, and operational processes to maintain service excellence.
- Ensure business service levels, availability targets, and operational commitments are consistently achieved.
- Participate in testing cycles to validate operational readiness and successful deployment of infrastructure and applications.
- Deploy, implement, and provision applications and infrastructure in accordance with deployment plans and build standards. Strategic Leadership & Collaboration
- Serve as the primary Subject Matter Expert (SME) for mainframe performance management and capacity planning.
- Partner with technology teams, engineering groups, infrastructure teams, and business stakeholders to recommend and implement operational improvements.
- Identify emerging trends, risks, and opportunities to inform technology decision-making and strategy.
- Mentor team members, share expertise, and contribute to the development of technical communities of practice across BMO.
- Influence operational strategy and promote innovative solutions, processes, and technologies that enhance platform performance and reliability.
- Operate at an enterprise level, providing specialized expertise and guidance to senior leaders and stakeholders. Innovation & Continuous Improvement
- Proactively identify opportunities to strengthen operational capabilities and improve service delivery.
- Drive initiatives that enhance monitoring, automation, performance optimization, and operational effectiveness.
- Champion a culture of continuous improvement and technical excellence.
- Apply creative thinking and expert judgment to solve complex, ambiguous, and non-routine challenges.
- Stay current with industry trends, emerging technologies, and best practices in mainframe operations, performance management, and capacity planning. What We're Looking For Required Qualifications
- 7-12 years of experience supporting large-scale mainframe environments.
- Expert-level knowledge of Mainframe Performance Management.
- Strong experience with production support, IT operations, monitoring, incident management, service restoration, and maintaining mission-critical systems.
- Deep understanding of enterprise monitoring, logging, alerting, and operational support processes.
- Proven experience troubleshooting complex performance, capacity, and availability issues.
- Strong analytical, investigative, and problem-solving skills with the ability to translate data into actionable insights.
- Experience with operational support practices, concepts, and technologies gained through formal training and/or practical experience.
- Strong understanding of system dependencies, infrastructure, and operational processes.
- Excellent verbal and written communication skills with the ability to influence technical and business stakeholders.
- Strong collaboration and r