Database Engineer, Mid-SR - $140K-$210K + 15% 401k

Millennial Software Solutions Inc; Herndon (VA); Hybrid; USD 140,000 - 190,000; Full time

Benefits offered by this job

Medical, dental & vision coverage for

Disability & life insurance

401(k) with 15% company contribution

30 days PTO/holidays

Generous training budget

Paternal & Maternal Leave

Company swag

Job summary

Millennial Software Solutions Inc. is seeking a Database Engineer to design, implement, and optimize database infrastructures across relational, graph, and semantic systems.

You will support mission-critical applications and work with ontology engineers, data scientists, and government stakeholders to translate requirements into scalable data architectures. Hybrid work arrangement allows three days in-office and up to two days remote per week, with a focus on performance, security, availability,

Qualifications

• Design, implement, optimize, and maintain database infrastructure for mission requirements.
• Experience with relational, graph, and semantic databases and performance tuning.
• Knowledge of enterprise metadata management and data governance.

Responsibilities

• Design and optimize relational, graph, and semantic database environments.
• Develop data models supporting ontologies, taxonomies, knowledge graphs.
• Build scalable architectures using Semantic Web technologies and RDF stores.
• Create ETL/ELT pipelines from diverse enterprise sources.
• Collaborate with Government stakeholders to translate requirements into designs.
• Ensure security, backups, and high availability per government requirements.

Skills

Database design & modeling

Relational & graph databases

Semantic Web & knowledge graphs

Data integration & ETL/ELT

Security & compliance

Education

Advanced degree (MS/PhD) or 17+ years with Bachelor

Bachelor’s degree in Computer Science or related

Tools

PostgreSQL

Oracle

Microsoft SQL Server

Neo4j/Amazon Neptune/Stardog/GraphDB

RDF/ SPARQL tools

Job description

Description

About Millennial Software:

Millennial Software is revolutionizing the landscape of security and defense by leveraging our core competencies in software development, automation, DevSecOps, and machine learning.

• 100% company-paid medical, dental, and vision premiums for you and all dependents
• Ability to get increased salary if you don't need medical/dental/vision
• 100% company-paid disability and life insurance benefits
• 15% 401(k) company contribution
• 30 days of PTO/holidays
• Generous training budget
• Paid Paternal and Maternal Leave
• Business development / growth incentives
• Top notch company swag

Job Description:

Millennial Software is seeking a Database Engineer to join our team. You will be responsible for designing, implementing, optimizing, and maintaining database infrastructure supporting Object-Based Intelligence (OBI) mission requirements, enterprise ontologies, and knowledge graph platforms. Our ideal candidate is an experienced Database Engineer who can develop scalable data architectures across relational, graph, and semantic database technologies while maintaining high standards for performance, security, availability, and data integrity.

You will work closely with ontology engineers, software developers, data architects, data scientists, analysts, and Government stakeholders to translate mission requirements into effective database and data integration solutions. This role will support Semantic Web technologies, knowledge graphs, and AI/ML-enabled analytics across structured, semi-structured, and unstructured data environments.

This position allows for a hybrid work option with three days in office and up to two days remote each week, as business needs permit.

Essential Functions:

• Design, implement, administer, and optimize relational, graph, and semantic database environments supporting mission requirements.
• Develop logical and physical data models supporting ontologies, taxonomies, knowledge graphs, and enterprise metadata management.
• Design scalable database architectures utilizing Semantic Web technologies, including RDF triple stores, graph databases, and SPARQL endpoints.
• Develop and maintain ETL/ELT processes to integrate data from diverse enterprise sources into knowledge management platforms.
• Collaborate with technical teams and Government stakeholders to translate mission requirements into database designs and data integration solutions.
• Optimize database performance through query optimization, indexing, partitioning, replication, and capacity planning.
• Implement database security, encryption, access controls, backup and recovery procedures, and auditing in accordance with Government cybersecurity requirements.
• Develop automation, monitoring, and maintenance processes to support database availability, reliability, and operational efficiency.
• Support AI/ML initiatives by providing scalable infrastructure and efficient access to structured, semi-structured, and semantic data.
• Maintain technical documentation, database standards, data dictionaries, configuration management artifacts, and operational procedures.
• Provide technical leadership, mentoring, and knowledge transfer to Government personnel and project team members on database architecture and administration best practices.

Required Qualifications:

• Must be a U.S. Citizen
• Active TS/SCI clearance
• Must be able to successfully obtain and maintain a CI Polygraph
• Must be willing to work on-site a minimum of 3 days a week, with 2 days of remote flexibility; depending on business needs
• 12+ years of relevant experience with an advanced degree or 17+ years of relevant experience with a Bachelor’s Degree
• Demonstrated experience designing, implementing, and administering enterprise database solutions for mission-critical applications
• Experience with relational database technologies such as PostgreSQL, Oracle, or Microsoft SQL Server and graph databases such as Neo4j, Amazon Neptune, Stardog, GraphDB, or equivalent
• Experience designing and optimizing databases supporting Semantic Web technologies, RDF data stores, or knowledge graph platforms
• Experience developing ETL/ELT processes and integrating structured, semi-structured, and unstructured data from multiple enterprise sources
• Knowledge of database performance tuning, indexing, backup and recovery, replication, security, and high-availability architectures

Nice to have:

• Experience supporting enterprise ontology or knowledge graph initiatives within Government or Intelligence Community environments
• Experience implementing RDF triple stores, SPARQL endpoints, and semantic data integration frameworks
• Familiarity with AI/ML data pipelines and semantic data architectures supporting advanced analytics
• Experience with cloud-based database platforms and containerized environments, including Kubernetes and OpenShift
• Experience automating database deployment, configuration management, and monitoring using Infrastructure as Code (IaC) tools
• Relevant database or data management certifications, such as CDMP, OCP, Azure Database Administrator Associate, AWS Database Specialty, or equivalent
• Experience providing technical leadership, mentoring, and knowledge transfer to Government personnel or multidisciplinary teams

Millennial Software Solutions Inc. is an Equal Opportunity Employer and does not discriminate in employment on the basis of race, color, religion, sex, national origin, political affiliation, sexual orientation, gender identity, marital status, disability and genetic information, age, membership in an employee organization, or other non-merit factor.