Sr. Database Administrator (Oracle)

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Job Overview
At T-Mobile, Senior Database Administrators are the trusted experts driving the performance and evolution of our data platforms. You’ll lead the charge in configuring, monitoring, and optimizing large-scale Oracle environments that power our business systems nationwide. This role is perfect for someone who thrives in dynamic, high-availability settings and enjoys solving complex challenges, improving automation, and ensuring database reliability and security. As a technical authority, you’ll influence enterprise-level projects, mentor peers, and collaborate across teams to deliver next-generation data solutions that keep T-Mobile at the forefront of innovation.

The Senior Database Administrator is responsible for the configuration, administration, monitoring, performance tuning, replication, backup/restore, and troubleshooting of Oracle database environments in a highly dynamic and mission-critical infrastructure. This role provides advanced technical and operational support for T-Mobile’s business systems, ensuring database security, integrity, and optimal performance across on-premises and cloud environments.

Main Responsibilities

• Administer and support large-scale Oracle database environments across on-premises and AWS infrastructures.
• Install, configure, patch, and upgrade Oracle software, ensuring adherence to enterprise standards and compliance requirements.
• Implement and manage Oracle Data Guard and Oracle GoldenGate for high availability, replication, and disaster recovery.
• Perform advanced performance tuning and optimization of database queries, indexes, and schemas for mission-critical workloads.
• Automate deployment, patching, and maintenance processes using Ansible, Terraform, and GitLab CI/CD pipelines.
• Develop and maintain scripts (Bash, Python, PL/SQL) to improve operational efficiency and consistency.
• Configure and monitor database health and performance using Oracle Enterprise Manager (OEM), Grafana, and Prometheus.
• Enforce enterprise security and access controls, manage user roles and privileges, and ensure compliance with policies such as SOX and PCI.
• Partner with developers, architects, and infrastructure teams to ensure data integrity, scalability, and system reliability.
• Provide expert-level troubleshooting and root cause analysis for high-impact production issues.
• Contribute to continuous improvement of standards, documentation, and automation frameworks.

Qualifications

Education

• Bachelor’s degree in Information Systems, Computer Science, or equivalent experience (required)

Experience

• 5–8 years of experience in Oracle database administration and performance tuning (required)
• Experience supporting enterprise-level production systems in hybrid cloud environments (preferred)

Knowledge, Skills, and Abilities

• Advanced proficiency in Oracle architecture, RAC, Data Guard, and GoldenGate.
• Strong command of backup/recovery strategies, security management, and capacity planning.
• Experience with automation and DevOps tools such as Ansible, Terraform, and GitLab CI/CD.
• Excellent analytical, problem-solving, and communication skills.

Databases & Data Technologies

• Oracle • Data Guard • Oracle GoldenGate • Real Application Cluster (RAC) • Maximum Availability Architecture • CMDB (Configuration Management Database)

Infrastructure & Cloud

• AIX • Linux • AWS (Amazon Web Services) • EC2 • S3 • Elastic Beanstalk • ELB (Elastic Load Balancer) • RDS • VPC • Direct Connect • Route53 • CloudWatch • CloudFormation • IAM • SNS • On-Premises • Cloud Database Migration

Automation & DevOps Tools

• Ansible • Ansible Tower • Terraform • GitLab • GitLab CI/CD • Docker • Kubernetes (K8s) • ServiceNow • Bash • Python • PL/SQL

Monitoring & Observability (OEM – Oracle Enterprise Manager)

• Grafana • Prometheus • Metric Dashboards • Database Monitoring

Security, Compliance & Governance

• Imperva • Splunk • Data Encryption • Data Classification • Data Scanning • Data Governance • SOX • PCI • CMMC • Logical Access (LA) • Segregation of Duties (SOD) • User Access Reviews (UAR) • Change Management (CM) • Comp