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Freelance Sql Query Writer Jobs in Virginia (NOW HIRING)

Teamware Solutions Inc

AWS Data engineer

Reston, VA · On-site

$119K - $143K/yr

Proficiency in SQL query and coding * Strong Python development experience with Python, Pandas ... Excellent written communication skill * Skilled in documentation and reporting for the purposes of ...

Chenega MIOS SBU

Senior Systems Engineer

Vienna, VA · On-site

$104K - $143K/yr

... query writing (such as SQL Server, Oracle, PostgreSQL) • Active or Current (within two years of active) Top Secret Security Clearance with SCI eligibility Preferred : • Master's degree in ...

Xforia, Inc.

Microstrategy Admin

Mclean, VA · On-site +1

Strong on SQL query writing. * Experience in SQL troubleshooting, report failures, project and Intelligence server level governing settings and their impacts. * Perform MicroStrategy security and ...

Chenega MIOS SBU

Mid Systems Engineer

Vienna, VA · On-site

... query writing (such as SQL Server, Oracle, PostgreSQL) • Active or Current (within two years of active) Top Secret Security Clearance with SCI eligibility Preferred : • Master's degree in ...

Leidos

Mid-Level SQL Engineer

Alexandria, VA · On-site

$87K - $157K/yr

Write complex SQL queries involving joins, aggregations, filtering, subqueries, and window functions to support dashboards * Data Shaping for Visualization: Structure query outputs in a way that is ...

HCL Global Systems Inc

.Net Developer

Richmond, VA · On-site

$47.25 - $62.50/hr

NET Core / .NET 6+) is strongly preferred • Solid experience with Oracle databases, including: • Writing and maintaining complex stored procedures • SQL query analysis and performance tuning ...

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Infographic showing various Freelance Sql Query Writer job openings in Virginia as of August 2026, with employment types broken down into 88% Full Time, 6% Part Time, and 6% Contract. Highlights an 72% In-person, 6% Hybrid, and 22% Remote job distribution.

Senior Database Administrator (Top Secret Cleared)

Electronic Consulting Services, Inc (ECS Federal)

Quantico, VA • On-site

$165K - $185K/yr

Other

Posted 2 days ago

New

Job description

Job Description
ECS is seeking a Senior Database Administrator (Top Secret Cleared) to work in Quantico, VA (Hybrid) .
Are you ready to play crucial role in supporting cutting-edge technology for federal law enforcement and scientific organizations with IT services and support for hardware, IT systems, applications, and operational technologies that support mission critical operations? ECS is seeking a highly skilled and motivated Senior Database Administrator to support a strategic laboratory program in support of our DOJ FBI Client. The scope of this program is to enhance enterprise services and solutions to this FBI component, as part of an integrated evaluation, integration, strategy, design, implementation, and operational maintenance program. This position is located in Quantico, VA.
This position is responsible for administering, troubleshooting, and maintaining databases. The ideal candidate will have experience in various database technologies and have a strong understanding of on-premises solutions such as Microsoft SQL Server and cloud-based database solutions within AWS. Additionally, the successful candidate will be an active contributor to our database operations and use technology to continuously improve the team's performance.
Responsibilities
  • Design, develop, optimize, and maintain complex T-SQL queries, stored procedures, functions, views, and database scripts to support enterprise applications and reporting requirements.
  • Monitor and tune database performance through query optimization, indexing strategies, and execution plan analysis.
  • Develop, manage, and continuously improve index management and statistics optimization.
  • Develop, design, and support Power BI datasets, ensuring efficient integration with SQL queries, views, and underlying data models.
  • Develop and optimize Power BI DAX expressions for advanced reporting and analytics.
  • Experienced with design and implementation of complex data structure types and integrations across multiple organizational units
  • Experience with mapping and creating entity relationship diagrams
  • Ensure database performance through proactive query optimization.
Salary Range: $165,000 - $185,000
General Description of Benefits
Required Skills
  • ship with active Top-Secret clearance
  • Bachelor's degree in computer science, Information Technology, or a related field, or additional 3 years of experience.
  • Minimum of 8 years' experience recommended. In absence of years of experience, certifications or past work may be used to show the level of experience needed to perform at this level.
  • Strong proficiency in SQL query writing, query tuning, and performance optimization
  • Strong understanding of database architecture and design.
  • Knowledge of database security and access controls.
  • Advanced knowledge of SQL and database query languages.
  • Expertise in troubleshooting, performance tuning, and query optimization.
  • Excellent communication, problem-solving, and organizational skills.
  • Ability to work independently and as part of a team.
  • Experience monitoring, performing updates, upgrades, testing, and other associated preventative maintenance and support functions related to Database Platforms

Desired Skills
  • Prior federal government experience supporting scientific organizations or law enforcement communities
  • Experience in assessment, evaluation, and migration of on-premises databases to a cloud environment
  • Experience in assessment, evaluation, and documentation of client environment, infrastructure, process, operations
  • Experience with Data Warehousing and Analytic capabilities and solutions

#EverforthECS1
ECS FEDERAL LLC is an equal opportunity employer and does not discriminate or allow discrimination on the basis any characteristic protected by law. All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, or local jurisdiction law.
Everforth ECS is the federal segment of Everforth , a $4B global organization with over 10,000 employees. Our nearly 3,500 professionals deliver advanced technology solutions in data and AI, cybersecurity, and enterprise transformation, serving defense, intelligence, and federal civilian agencies.
Our work powers mission-critical outcomes, strengthens technology partnerships, and creates meaningful opportunities for our people. We are defined by a commitment to excellence in delivery, a culture of innovation, and an environment where talent can thrive and grow.
We value:
  • Attracting and developing top talent and high-performing teams
  • Fostering a culture that is engaging, accountable, and mission-driven
Meet the challenge. Make a difference with Everforth ECS!

Apply