Database Administrator (Oracle)

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Job Overview
At T-Mobile, our Database Administrators keep the heartbeat of innovation strong. You’ll play a hands-on role in managing the performance, security, and reliability of Oracle databases that power millions of customer experiences. This is your opportunity to work with leading-edge technologies, solve complex problems, and collaborate with engineers across the business to deliver seamless, high-performance systems. If you’re driven by precision, reliability, and the challenge of optimizing enterprise-scale databases, you’ll find endless opportunities to grow and make an impact here.

The Database Administrator is responsible for the performance, integrity, and security of multiple Oracle databases across T-Mobile’s enterprise environment. This role ensures reliable operation and high availability by managing installations, patching, upgrades, monitoring, and performance tuning activities. The DBA assists in defining user requirements, enforces access controls, develops and executes backup and recovery strategies, and supports project initiatives to improve database performance and automation.

Main Responsibilities

• Install, configure, patch, and upgrade Oracle database software across Linux, AWS, and on-premises environments.
• Administer Oracle databases, ensuring performance, integrity, availability, and compliance with T-Mobile standards.
• Implement and manage Oracle Data Guard and Oracle GoldenGate for replication, high availability, and disaster recovery.
• Monitor database health, performance, and capacity using Oracle Enterprise Manager (OEM), Grafana, and Prometheus.
• Perform performance tuning, query optimization, and schema design improvements to enhance reliability and scalability.
• Develop and maintain backup and recovery procedures to safeguard enterprise data.
• Manage database users, roles, and privileges in compliance with security and regulatory requirements.
• Automate routine administrative tasks using Ansible, Terraform, GitLab CI/CD, Bash, Python, and PL/SQL.
• Document standards, procedures, and change management activities for operational consistency.
• Collaborate with application developers, system administrators, and project managers to support deployment and data integration initiatives.
• Provide troubleshooting and on-call support for production issues as part of a rotational schedule.​

Qualifications

Education

• Bachelor’s degree in Information Systems, Computer Science, or a related field (preferred)

Experience

• 2–5 years of hands-on experience administering Oracle databases in enterprise or cloud environments (required)

Knowledge, Skills, and Abilities

• Strong understanding of Oracle architecture, performance tuning, and backup/recovery.
• Proficiency in Linux system administration and basic cloud concepts (AWS preferred).
• Experience with automation tools and scripting languages for operational efficiency.
• Solid problem-solving, collaboration, 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

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) • Computer Operations (CO) • Vulnerability Management • Compliance Baselines • Security Policies • Security Standards

Automation & DevOps Tools

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

• At least 18 years of age
• Lega