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ETL Engineer

Job in Herndon, Fairfax County, Virginia, 22070, USA
Listing for: Cornerstone Defense LLC
Full Time position
Listed on 2026-05-27
Job specializations:
  • IT/Tech
    Data Engineer
Salary/Wage Range or Industry Benchmark: 90000 - 120000 USD Yearly USD 90000.00 120000.00 YEAR
Job Description & How to Apply Below

Title: Software Engineer

Location: Herndon, Virginia

Clearance: Active TS/SCI with Polygraph required to apply

Key Responsibilities
  • Design, develop, and maintain ETL/ELT pipelines that support data warehouse, analytics, and application needs.
  • Extract, transform, and load data from various sources into centralized storage solutions.
  • Design and enhance search and discovery platforms across large volumes of structured and unstructured data.
  • Perform data ingestion, ETL, and integration across enterprise and multi-source environments.
  • Optimize ETL workflows for performance, scalability, and reliability.
  • Conduct data validation, profiling, and quality checks to ensure accuracy and completeness.
  • Troubleshoot and resolve data inconsistencies, pipeline failures, or performance bottlenecks.
  • Build and maintain cloud-native solutions (AWS) aligned to secure and resilient architecture patterns.
  • Partner with mission operators, analysts, and senior stakeholders to define requirements and deliver mission-relevant analytics.
  • Translate mission needs into technical designs, architectures, and implementation roadmaps, ensuring alignment to operational objectives.
  • Deliver clear, compelling visualizations, dashboards, and executive-level briefings that communicate analytic insights and recommendations.
  • Provide technical leadership and mentorship, including hands‑on development, code review, and team development.
  • Own delivery of analytic capabilities from concept through deployment, accreditation, and sustainment.
  • Support system accreditation, data governance, and security architecture, ensuring data integrity and compliance within classified environments.
Mandatory Qualifications
  • Bachelor’s degree in Computer Science, Information Systems, Engineering, or related field (or equivalent experience).
  • Minimum 6‑8 years working in Linux operating system with experience optimizing parallel processing, memory, storage, and processing data at scale.
  • Minimum 6‑8 years in Object‑Oriented programming, with Python preferred.
  • Minimum 6‑8 years of demonstrated experience with applications in the Commercial Cloud Services (C2S) environment or Amazon Web Services (AWS). Will consider substitutes with a minimum 4‑6 years experience in Azure, Oracle, Google, etc.
  • Minimum 4‑6 years of demonstrated (Extract, Transform, Load - ETL) experience with large structured and unstructured raw data sets. Strong experience with ETL tools such as Informatica, Talend, SSIS, AWS Glue, or Azure Data Factory.
  • Proficiency in SQL, including complex queries and query optimization.
  • 6‑8 years of experience with AWS platform including understanding EC2, RCS instance types.
  • Strong understanding of data warehousing concepts, data modeling, and schema design.
  • Hands‑on experience with scripting languages such as Python, Bash, or Power Shell.
  • Familiarity with relational and No

    SQL databases.
  • Experience using version control systems such as Git.
Optional Skills
  • Experience working with big data technologies (Spark, Hadoop, Databricks).
  • Experience with transformer‑based models (BERT) and modern NLP architectures.
  • Background in document exploitation, e‑discovery, or large‑scale search platforms.
  • Experience with multi‑modal analytics (OCR, image recognition, text + image fusion).
  • Familiarity with search technologies (Solr, Elasticsearch, Lucene).
  • Experience with containerization and Dev Sec Ops  pipelines (Docker, CI/CD).
  • Cloudera or similar big data certifications.
  • Experience developing risk scoring, anomaly detection, or predictive analytic models.
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Position Requirements
5+ Years work experience
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