Senior Database Administrator (Senior DBA)

American IT Systems•Miami, FL

1d•Hybrid

About The Position

The Senior DA is responsible for the design, implementation, administration, performance optimization, security, availability, and lifecycle management of enterprise database platforms supporting mission-critical applications. The role provides technical leadership for database architecture, automation, cloud migration, disaster recovery, capacity planning, and operational excellence across multiple database technologies.

Requirements

Oracle (RAC, ASM, Data Guard)
PostgreSQL
MongoDB
Cassandra
AWS
Python
Shell Scripting
PowerShell
Ansible
Terraform
Dynatrace
Splunk
Grafana
Prometheus
Git
Jenkins
GitHub Actions
Docker
Technical Leadership
Problem Solving
Stakeholder Management
Automation Mindset
Risk Management
Operational Excellence
Customer Focus
Team Mentoring

Nice To Haves

Kubernetes

Responsibilities

Manage and support large-scale production databases with 24x7 availability requirements.
Administer Oracle, PostgreSQL, MongoDB, Cassandra and other enterprise database platforms.
Perform database installation, configuration, upgrades, patching, cloning, and migrations.
Ensure database health, availability, integrity, and performance.
Analyze and optimize SQL queries, indexing strategies, execution plans, and database configurations.
Conduct capacity planning and resource utilization forecasting.
Resolve performance bottlenecks and implement proactive tuning measures.
Design and maintain HA and DR solutions.
Manage technologies such as: Oracle Data Guard RAC, PostgreSQL Replication, Cassandra Multi-DC Clusters, MongoDB Replica Sets/Sharding, Always-On Availability Groups.
Conduct periodic DR drills and recovery testing.
Support cloud database platforms: AWS RDS/Aurora PostgreSQL, AWS DynamoDB, MongoDB Atlas.
Lead database migration and modernization initiatives.
Develop automation scripts using: Shell, Python, Ansible, Terraform.
Implement Database CI/CD pipelines.
Integrate database deployments with DevOps toolchains.
Champion Infrastructure as Code (IaC) practices.
Provide L3/L4 support for critical database incidents.
Conduct RCA and implement preventive actions.
Participate in major incident management and change governance.