Data Scientist; TS​/SCI Poly Security Clearance

Position: Data Scientist (TS/SCI with Poly Required) with Security Clearance
Job Category:
Data Science and Data Engineering

Requisition Number: DATAS
002134 Posting Details
* Posted:
June 2, 2026

* Full-Time

* On-site

* Salary Range: $81,348.80 USD to $ USD Job Details Description GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.

At GCI, we solve the hard problems. As a Data Scientist, a typical day will include the following duties:

Required Skills:

* Demonstrated experience building production data pipelines and ETL/ELT workflows at scale.

* Demonstrated experience with Apache Spark and PySpark for distributed data processing.

* Demonstrated experience with advanced Python programming skills including data manipulation libraries (Pandas, Num Py) and data engineering best practices.

* Demonstrated experience understanding data security, privacy, governance, and compliance principles.

* Demonstrated experience with workflow orchestration tools such as Step Functions and Airflow.

* Demonstrated experience with containerization such as Docker or Podman, and deploying data applications in cloud environments.

* Demonstrated experience with AWS services (in particular S3, Lambda, and Step Functions).

* Demonstrated experience with Postgre

SQL and MySQL in production environments, including performance tuning and schema design.

* Demonstrated experience with SQL and query optimization for complex analytical workloads.

* Demonstrated experience with version control (Git) and CI/CD practices for data pipelines.

* Demonstrated experience working with stakeholders to understand data requirements, assess feasibility, and design appropriate solutions with minimal oversight.

* Demonstrated experience with strong problem-solving and debugging skills for data quality issues, pipeline failures, and performance bottlenecks.
Desired

Skills:

* Demonstrated experience with data lakehouse architectures using Apache Iceberg.

* Demonstrated experience configuring, deploying, and integrating data platform components:
Apache Ranger (access control and data governance), Trino (distributed SQL query engine), Data catalogs (Unity Catalog OSS, Apache Polaris, etc.), Apache Superset (data visualization and dashboarding).

* Demonstrated experience with Bash scripting for automation and data processing tasks.

* Demonstrated experience with Infrastructure as Code (Terraform or Cloud Formation) for data infrastructure.

* Demonstrated experience with tracking data lineage and associated tooling such as Open Lineage.

* Demonstrated experience with Java.

* Demonstrated experience with data quality frameworks, testing methodologies, and validation strategies.

* Demonstrated experience or background with large-scale data migrations or platform modernization efforts.

* Demonstrated experience integrating AI/ML services and models (translation, OCR, speech-to-text, NLP, language detection, topic modeling), LLMs, and RAG (retrieval-augmented generation) pipelines.

* Demonstrated experience with geospatial data processing (H3, PostGIS, or similar).

* Demonstrated experience Contributing to data engineering documentation, best practices, or design patterns.

* Demonstrated experience with No

SQL databases (Dynamo

DB, etc.).

* Demonstrated experience with excellent written and verbal communication skills with both technical and non-technical audiences.
* A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance. Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans Qualifications Skills Behaviors :
Motivations :
Education Preferred BA/BS or better. Experience Required 2 years:
Demonstrated related work experience. Licenses & Certifications Equal Opportunity Employer This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.  to learn more about us!