District of Columbia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking an experienced Senior Java Developer to modernize a critical government information system. The ideal candidate wi…
Skills: Java, Python, Apache Solr, Zookeeper, Apache Tomcat
Fairfax County, Virginia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking an experienced Senior Java Developer to modernize a critical government information system. The ideal candidate wi…
Skills: Java, Python, Apache Solr, Zookeeper, Apache Tomcat
Fairfax County, Virginia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking a skilled DevOps Engineer to support the modernization and deployment of a critical government information system.…
Skills: GitLab CI/CD, Nexus Repository, Apache Solr, Zookeeper, Windows Server Administration
Fairfax County, Virginia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking an experienced Database Engineer to support the modernization of a critical government information system. The ide…
Skills: Oracle 19c, AWS RDS, Database Administration, Schema Design, Performance Tuning
District of Columbia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking an experienced Database Engineer to support the modernization of a critical government information system. The ide…
Skills: Oracle 19c, AWS RDS, Database Administration, Schema Design, Performance Tuning
District of Columbia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking a skilled DevOps Engineer to support the modernization and deployment of a critical government information system.…
Skills: GitLab CI/CD, Nexus Repository, Apache Solr, Zookeeper, Windows Server Administration
District of Columbia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking a detail-oriented QA Engineer with strong UI testing expertise to ensure quality and compliance during the moderni…
Skills: UI Testing, Functional Testing, Regression Testing, Section 508/WCAG Compliance, API Testing
Fairfax County, Virginia, United States · Remote OK
Annapolis Junction, MD; Washington, DC; or Reston, VA area preferred (telework is allowed) We are seeking a detail-oriented QA Engineer with strong UI testing expertise to ensure quality and compliance during the moderni…
Skills: UI Testing, Functional Testing, Regression Testing, Section 508/WCAG Compliance, API Testing
Howard County, Maryland, United States · On-site
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE Job Description In this role, a typical day will include: Participating in requirement analysis, solution design, testing, and impl…
Skills: NetApp, Dell/EMC, Pure Storage, Cohesity, Rubrik
District of Columbia, United States · On-site
MUST HAVE AN ACTIVE TS/SCI+CI POLY AND MUST WORK ON SITE / NO REMOTE WORK Position description: The SharePoint Administrator will work as part of a collaborative team and handle documentation, configurations, implementat…
Skills: SharePoint Administration, Office 365, PowerShell, SQL Server, Power BI
District of Columbia, United States · On-site
REQUIRES AN ACTIVE / EXISTING TS/SCI WITH CI POLY - NO REMOTE WORK Location: Reston, VA OR Washington, DC Position Description: What You'll Work On: · Develop relationships quickly and easily with other teams, com…
Skills: Forescout CounterACT, Systems Administration, IP Network Design, Vulnerability Assessment, Splunk
Fairfax County, Virginia, United States · On-site
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE Job Description: As a security engineer on our team, you'll evaluate and support the documentation, validation, assessment, and acc…
Skills: Cloud Security Architecture, Risk Management Framework, Infrastructure as Code, Security Documentation, Cloud Administration
Fairfax County, Virginia, United States · On-site
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE Job Description: As a Linux and Ansible Automation Engineer on our project, you'll be on the ground floor of building something mea…
Skills: Linux Administration, Ansible, Infrastructure as Code, Bash, Python
District of Columbia, United States · On-site
REQUIRES AN EXISTING/ACTIVE TS/SCI WITH CI POLYGRAPH - NO REMOTE WORK, MUST WORK ON SITE Job Description: We are seeking a highly experienced Cribl Engineer to serve as the principal technical authority for observability…
Skills: Cribl Stream, Cribl Edge, Log Routing, Telemetry Pipelines, Splunk
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The role involves modernizing a critical government information system by upgrading the technology stack and legacy code. Responsibilities include managing Solr clusters, integrating Oracle databases, and collaborating with security and infrastructure teams.
Candidates need extensive experience in enterprise Java and Python development within secure government environments. A TS/SCI clearance and expertise in Apache Solr, Tomcat, and Oracle 19c are required.
We are seeking an experienced Senior Java Developer to modernize a critical government information system. The ideal candidate will have deep expertise in enterprise Java application development and a proven track record of upgrading complex software infrastructures in secure, regulated environments.
You will be responsible for planning and executing upgrades across our technology stack, including Apache Solr with Zookeeper, Apache Tomcat, Apache Directory Studio, and Java/Python components running on Windows-based VMware infrastructure. Strong knowledge of Oracle 19c database integration, SAP Business Intelligence reporting frameworks, secure coding practices, and upgrading and migrating Solr index data is essential. Experience with PrimeFaces UI framework is a plus. You will collaborate with cross-functional teams-including security, infrastructure, and business stakeholders-to ensure seamless upgrades with minimal operational disruption.
Position Responsibilities:
Core Development & Modernization:
•Plan and execute technology stack upgrades for enterprise Java applications in secure government environments
•Develop and maintain Java/Python components on Windows-based VMware infrastructure
•Modernize legacy application code to current standards and best practices
•Implement secure coding practices in compliance with government security requirements
Infrastructure & Integration:
•Upgrade Apache Solr clusters with Zookeeper coordination
•Migrate and optimize Solr index data during version upgrades
•Manage Apache Tomcat application server configurations and deployments
•Integrate applications with Oracle 19c database systems
•Work with Apache Directory Studio for directory services integration
•Support SAP Business Intelligence reporting framework integrations
Collaboration & Documentation:
•Collaborate with security, infrastructure, and business stakeholder teams
•Ensure minimal operational disruption during system upgrades
•Document technical designs, upgrade procedures, and system configurations
•Participate in code reviews and knowledge-sharing sessions
13+ Years of experience in Systems or IT related roles or a highly related field of work with similar scope and responsibilities.
A bachelor's degree may be substituted for 4 years of experience and a master's degree may be substituted for 6 years of experience.
•Experience with PrimeFaces UI framework
•TS/SCI with an in-scope polygraph
We Make Complicated Problems Simple
DAn Solutions specializes in systems integration solutions for a variety of business management operations. If you're looking to increase collaboration and productivity within your organization, we'll give you the tools and skill sets to help you achieve your goals. Our areas of expertise include SharePoint design, customization and integration, systems engineering and integration, network engineering, project management, Directory Services, software development, data warehousing, business intelligence, IT Security, Customer Relationship Management (CRM), security engineering, technical writing, and intelligence analysis. DAn Solutions has experienced senior consultants, program/project managers, and former military special operations personnel who specialize in analyzing, improving, and transforming business processes, operations, and technology strategies.
Offices: 2000 14th St N, Arlington, Virginia 22201, US
We Make Complicated Problems Simple
DAn Solutions specializes in systems integration solutions for a variety of business management operations. If you're looking to increase collaboration and productivity within your organization, we'll give you the tools and skill sets to help you achieve your goals. Our areas of expertise include SharePoint design, customization and integration, systems engineering and integration, network engineering, project management, Directory Services, software development, data warehousing, business intelligence, IT Security, Customer Relationship Management (CRM), security engineering, technical writing, and intelligence analysis. DAn Solutions has experienced senior consultants, program/project managers, and former military special operations personnel who specialize in analyzing, improving, and transforming business processes, operations, and technology strategies.
Offices: 2000 14th St N, Arlington, Virginia 22201, US
