We are looking for an experienced Senior Database Administrator to support an organization in Mississauga, Ontario. This position is suited to a senior technical specialist who can strengthen database reliability, guide architectural decisions, and improve performance across enterprise environments. The role works closely with delivery teams and business partners to ensure database solutions are scalable, secure, and aligned with operational priorities. Responsibilities:• Establish and oversee database performance and capacity strategies, including standards that support long-term stability and growth.• Partner with project managers, developers, and business analysts to deliver database components for concurrent business and technology initiatives.• Investigate and resolve production database issues, including performance concerns linked to application code and data processing.• Create detailed testing approaches and maintain reusable scripts to validate database changes before release.• Review requested changes, assess downstream impact, and provide informed estimates for effort, timelines, and implementation considerations.• Develop and maintain automation and support scripts using Perl, shell scripting, and PL/SQL for monitoring, maintenance, and operational support.• Design and implement database architecture across development, test, and production environments to ensure consistency and resiliency.• Participate in an after-hours support rotation to address urgent database incidents and maintain service continuity.

• Completion of post-secondary education in computer science, information systems, computer engineering, or a related discipline. • Minimum of 10 years of hands-on database administration experience, with strong expertise in Oracle environments. • Strong working knowledge of Microsoft SQL Server and Oracle database platforms in enterprise settings. • Demonstrated experience with data architecture, large-scale data modelling, and business intelligence solutions. • Proven ability in capacity planning, performance tuning, troubleshooting, high availability, replication, clustering, and disaster recovery. • Practical experience with PL/SQL, database monitoring tools, backup technologies, and scripting for administration and automation. • Strong communication and analytical skills, with the ability to influence database direction and support enterprise data management practices. • Additional value will be given to experience with Oracle Exadata, DataGuard, Veeam or similar backup solutions, Microsoft Dynamics, batch scheduling tools, and bilingualism in French and English.

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Mississauga, ON
onsite
Permanent
95000 - 115000 CAD / Yearly
We are looking for an experienced Senior Database Administrator to support an organization in Mississauga, Ontario. This position is suited to a senior technical specialist who can strengthen database reliability, guide architectural decisions, and improve performance across enterprise environments. The role works closely with delivery teams and business partners to ensure database solutions are scalable, secure, and aligned with operational priorities. Responsibilities:• Establish and oversee database performance and capacity strategies, including standards that support long-term stability and growth.• Partner with project managers, developers, and business analysts to deliver database components for concurrent business and technology initiatives.• Investigate and resolve production database issues, including performance concerns linked to application code and data processing.• Create detailed testing approaches and maintain reusable scripts to validate database changes before release.• Review requested changes, assess downstream impact, and provide informed estimates for effort, timelines, and implementation considerations.• Develop and maintain automation and support scripts using Perl, shell scripting, and PL/SQL for monitoring, maintenance, and operational support.• Design and implement database architecture across development, test, and production environments to ensure consistency and resiliency.• Participate in an after-hours support rotation to address urgent database incidents and maintain service continuity.
2026-04-29T00:00:00Z

Senior Database Administrator Job in Mississauga, ON | Robert Half