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Leidos

SQL Engineer, SME

Leidos

. Develop advanced, high-performance SQL queries across large, complex datasets (multi-table joins, window functions, aggregations) .

Posted 4/22/2026full-timeArizona, Colorado, Maryland, Montana, Virginia • 🇺🇸 United StatesSeniorLead💰 $131,300 - $237,350 per yearWebsite

Tech Stack

Tools & technologies
ETLLinuxMySQLOraclePostgresSQLTypeScript

About the role

Key responsibilities & impact
  • Develop advanced, high-performance SQL queries across large, complex datasets (multi-table joins, window functions, aggregations)
  • Optimize query performance using execution plans, indexing strategies, and query refactoring
  • Ensure data accuracy and integrity across reporting datasets
  • Troubleshoot and resolve data issues across database and application layers
  • Shape and structure data for efficient and intuitive dashboard visualization
  • Collaborate with ETL engineers and dashboard developers to ensure reliable, end-to-end data delivery

Requirements

What you’ll need
  • Bachelor’s degree with 12-15 years of experience, or Master’s with 10-13 years of experience. May possess a Doctorate in technical domain
  • U.S. Citizenship
  • Active TS/SCI with the ability to successfully pass a Polygraph
  • Expert-level SQL skills, including: Complex joins across large datasets, Query optimization and execution plan analysis, Aggregations, subqueries, and window functions
  • Strong experience with relational databases (PostgreSQL, MySQL, Oracle, or similar)
  • Experience working with large-scale data supporting analytics/reporting
  • Proficiency in Linux environments
  • Ability to work independently and solve complex data challenges

Benefits

Comp & perks
  • Health and Wellness programs
  • Income Protection
  • Paid Leave
  • Retirement

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
SQLquery optimizationexecution plansmulti-table joinswindow functionsaggregationssubqueriesrelational databasesPostgreSQLMySQL
Soft Skills
problem-solvingindependencecollaboration
Certifications
Bachelor's degreeMaster's degreeDoctorateActive TS/SCI