PostgreSQL Senior Database Administrator; DBA

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SQL Senior Database Administrator (DBA) role at Marsh

Marsh McLennan’s Database Services team is growing rapidly, and we have an exciting opportunity for a creative and inquisitive Senior Database Administrator skilled in Postgres and Oracle. This hybrid role requires 3 days in-office in Canada and offers the chance to work on a global team responsible for critical enterprise database systems.

• Manage, optimize, and ensure the high availability of Postgre
  
  SQL databases hosted on Linux and cloud platforms (AWS and Azure).
• Lead complex database migration projects from Oracle to Postgre
  
  SQL, including performance tuning and high-availability configurations.
• Implement advanced Postgre
  
  SQL features such as partitioning, indexing strategies, query tuning, and replication to optimize performance at scale.
• Oversee configuration and management of cloud-based Postgre
  
  SQL offerings and maintain disaster recovery solutions with RTO & RPO considerations.
• Utilize Postgre
  
  SQL extensions (e.g., PostGIS, , _statements) and support Oracle DB features like RMAN, Export/Import, and Triggers.
• Contribute to automation initiatives by researching and presenting new technologies to enhance database strategy and operations.

• 5+ years of Postgre
  
  SQL database experience, including at least 3 years working in cloud environments.
• Minimum 2 years of hands‑on experience migrating Oracle databases to Postgre
  
  SQL.
• Bachelor’s degree preferred or equivalent professional experience.
• Extensive experience as a Senior Postgre
  
  SQL/Oracle Database Engineer, with a strong focus on migrating Oracle databases to Postgre
  
  SQL.
• Solid knowledge of relational database management systems and cloud computing architecture.
• Skilled in database design, cloud computing, and Data Lake Architecture.

• Advanced expertise in Postgre
  
  SQL internals and performance tuning, including query execution plans, autovacuum settings, and complex transaction management.
• Familiarity with infrastructure‑as‑code tools such as Terraform and Ansible is a plus.
• Entrepreneurial mindset with a passion for automation and continuous improvement in database technologies.
• Experience with Mongo DB or MySQL is preferred.

• We help you be your best through professional development opportunities, interesting work and supportive leaders.
• We foster a vibrant and inclusive culture where you can work with talented colleagues to create new solutions and have impact for colleagues, clients and communities.
• Our scale enables us to provide a range of career opportunities, as well as benefits and rewards to enhance your well‑being.

Marsh McLennan (NYSE: MMC) is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses:
Marsh, Guy Carpenter, Mercer and Oliver Wyman. With annual revenue of $24 billion and more than 90,000 colleagues, Marsh McLennan helps build the confidence to thrive through the power of perspective. For more information, visit , or follow on Linked In and X.

Marsh McLennan is committed to embracing a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age background, disability, ethnic origin, family duties, gender orientation or expression, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color or any other characteristic protected by applicable law.

In accordance with the Accessibility for Ontarians with Disabilities Act, 2005, Marsh McLennan will provide a reasonable accommodation to employees and prospective employees to the point of undue hardship upon request and as required in respect of the individual’s particular restrictions and limitations. If you require a specific accommodation because of a disability or medical need, please contact rea

Marsh McLennan is committed to hybrid work, which includes the flexibility of working remotely and the collaboration, connections and professional development benefits of working together in the office. All…