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Database Engineer (Mid-Level)

Aptonet
Washington, DC Contractor
POSTED ON 12/13/2025 CLOSED ON 1/11/2026

What are the responsibilities and job description for the Database Engineer (Mid-Level) position at Aptonet?

Database Engineer (Mid-Level) – On-Site, Washington DC

πŸ“ Location: Washington, DC (On-site, 5 days/week)

πŸ”’ Clearance: Active Public Trust required (DOJ Public Trust preferred)

πŸ›‚ Citizenship: U.S. Citizenship required minimum 3 years of U.S. residency

⏳ Contract: 6 months with possible extension

πŸ“ž On-Call: Required (primarily for incident support)

πŸ•’ Hours: Standard 40-hour work week


πŸ”Ž Role Overview

We are seeking a Mid-Level Database Engineer to support mission-critical database environments across Oracle, MySQL, and PostgreSQL. The role involves managing and optimizing databases across Linux, Windows, AWS, and on-prem environments, supporting modernization initiatives, ensuring reliability, and driving performance improvements. This position works closely with development, infrastructure, and security teams.


🧩 Key Responsibilities

  • Support and standardize enterprise-wide Configuration Management Database (CMDB).
  • Install, configure, and maintain Oracle, MySQL, and PostgreSQL across cloud and on-prem systems.
  • Configure new databases, servers, and related infrastructure.
  • Manage replication, clustering, and high-availability setups.
  • Perform performance tuning, root-cause analysis, and optimization.
  • Apply Quarterly Patch Set Updates (PSUs) for Oracle/MySQL.
  • Lead database upgrades, patching, migrations, and refreshes.
  • Support AWS DMS, cloud modernization, and automation initiatives.
  • Monitor performance metrics and proactively resolve bottlenecks.
  • Execute and validate database backups and ensure SLA compliance.
  • Maintain baseline activities, snapshots, and monthly maintenance.
  • Troubleshoot deadlocks, slow queries, indexing issues, and integrity checks.
  • Manage user roles, permissions, and enforce security policies.
  • Implement and monitor encryption, vulnerability fixes, and audit logs.
  • Participate in DR testing, failover exercises, and backup validation.
  • Provide on-call production support when required.
  • Conduct AWS R&D to support new tools and automation improvements.
  • Maintain detailed documentation and generate performance/growth reports.
  • Collaborate with application, infrastructure, and security stakeholders.


πŸ› οΈ Required Technical Skills

  • Certifications in Oracle, MySQL, and PostgreSQL Administration.
  • Strong hands-on experience with Oracle/MySQL/PostgreSQL on Linux & Windows.
  • Proficiency with AWS database services (RDS, EC2-hosted databases).
  • Expertise in installation, configuration, tuning, and maintenance.
  • Strong skills in backup/restore, DR planning, and failover testing.
  • Ability to troubleshoot using execution plans and performance metrics.
  • Understanding of security controls, encryption, audit logging, and remediation.
  • Experience with monitoring and database automation tools.
  • Ability to support production databases with on-call responsibilities.
  • Strong communication and teamwork skills.


✨ Preferred Skills

  • Experience deploying/managing databases across AWS, on-prem, and hybrid environments.
  • Database migration, upgrades, and replication experience.
  • SQL optimization, query tuning, and index management.
  • Participation in monthly maintenance, patching cycles, and DR tests.
  • Strong documentation practices.


πŸŽ“ Qualifications

  • Bachelor’s degree or equivalent experience.
  • Up to 2 years of relevant experience (per role classification).
  • Must hold or obtain a Public Trust clearance.
  • Must work 100% on-site in Washington, DC.


πŸ“Œ Additional Details

  • Work Environment: Government site (no remote options).
  • Interview Process: Phone/Teams interviews.
  • No overtime expected.

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Hourly Wage Estimation for Database Engineer (Mid-Level) in Washington, DC
$48.00 to $62.00
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