Senior Database Administrator

We are seeking an experienced Senior Database Administrator to provide comprehensive operational support, maintenance, administration, and performance optimization for critical enterprise database environments. In this role, you will oversee multi-platform database architectures—spanning Microsoft SQL Server, IBM DB2, and Oracle systems—to ensure high availability, data integrity, security, and disaster recovery. Working closely with cross-functional application teams, developers, and infrastructure leads, you will manage complex database clusters, execute version upgrades, design REST API integrations, and drive database modernization across mission-critical systems.

Location: Toronto, ON (Fully Onsite – 5 days/week required)

Duration: 12-month contract.



Advantages
Multi-DBMS Enterprise Scope: Manage diverse, large-scale database platforms spanning SQL Server, IBM DB2, and Oracle.

Next-Gen Tech Platform: Gain hands-on leadership upgrading and supporting modern SQL Server environments (2019, 2022, 2025).

High-Availability Focus: Direct complex Failover Clustering, Always On Availability Groups, and disaster recovery architectures.

Dedicated Onsite Collaboration: Work alongside senior engineering peers and infrastructure leads in a focused 5-day onsite workspace.



Responsibilities
Operational Database Administration: Provide day-to-day administration, monitoring, patching, capacity planning, and troubleshooting across Microsoft SQL Server, IBM DB2, and Oracle database environments.

High Availability & Disaster Recovery: Configure, maintain, and support high-availability solutions, including SQL Server Failover Clustering, Always On Availability Groups, backup/recovery protocols, and replication processes.

REST API & Data Integration: Design, build, and implement secure REST API integrations and data exchange patterns to connect database platforms with external enterprise services.

Performance Tuning & Optimization: Analyze system execution plans, optimize complex SQL queries, tune index structures, and troubleshoot performance bottlenecks.

Database Upgrades & Migrations: Plan and execute seamless database migrations, environment refreshes, and platform upgrades across modern SQL Server versions (2019, 2022, 2025).

Security & Governance Controls: Enforce database security access controls, manage user roles, maintain audit logging, and ensure compliance with enterprise cybersecurity policies.

Change Management & Technical Support: Coordinate database release promotions, patch implementations, and Change Request (CRQ) testing in accordance with ITIL service management frameworks.

Documentation & Knowledge Transfer: Author technical architecture runbooks, system documentation, and operational procedures while delivering knowledge-sharing sessions to technical teams.



Qualifications
SQL Server Administration Seniority: Extensive hands-on database administration experience with Microsoft SQL Server platforms, specifically including SQL Server 2019, 2022, and 2025 (Strictly Required).

Multi-DBMS Technical Expertise: Demonstrated, hands-on administration experience with at least one additional enterprise DBMS: Oracle 19c, DB2 for Windows/Linux, or DB2 for z/OS (Mainframe) (Strictly Required).

REST API Integration: Proven experience designing and implementing REST API integrations and integration best practices (Strictly Required).

Clustering & High Availability: Deep knowledge of setup, monitoring, failover troubleshooting, and maintenance for SQL Server Failover Clustering and Always On Availability Groups.

Performance Tuning & HA/DR: Strong expertise diagnosing query bottlenecks, optimizing indexes, and implementing robust backup and disaster recovery strategies.

Upgrades & Release Management: Hands-on experience executing SQL Server version upgrades, patching, release promotions, and ITIL-aligned change management.



Summary
If you're interested in the "Senior Database Administrator" role based in Toronto, we encourage you to apply online at www.randstad.ca.
Only qualified candidates will be contacted for the next steps. We look forward to hearing from you!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.