# Senior Data Engineer

Expression is seeking an experienced Senior Data Engineer to design, develop, and integrate secure enterprise data services supporting advanced Artificial Intelligence (AI) and Large Language Model (LLM) capabilities for the Department of Homeland Security (DHS). This position will support the development of secure, mission-focused AI applications within the Government's existing AI environment. The Senior Data Engineer will be responsible for implementing governed data integrations with enterprise platforms, including Palantir, Databricks, and Elasticsearch, enabling AI agents and retrieval-augmented generation (RAG) workflows to securely access, process, and reference authorized information. The ideal candidate is a hands-on data engineer with extensive experience in enterprise data integration, API development, data modeling, and secure data access. You are comfortable working across complex data ecosystems, developing scalable integration services, troubleshooting data quality and performance issues, and collaborating with AI engineers to deliver reliable, source-grounded AI applications. This role requires strong SQL and Python development skills, experience integrating struct

- **Id**: 4047891
- **Url**: <https://alion.io/job/expression-networks-senior-data-engineer>
- **Role**: Data Science
- **Role family**: Data Science
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 7
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-11T00:42:58Z
- **Employer posted date**: 2026-11-11
- **Last verified at**: 2026-11-11T00:44:01Z
- **Board verified**: yes
- **Days open**: 0
- **Description format**: text
- **Description chars**: 10241
- **Description truncated**: no
- **Benefits**: 401k plan, Life insurance, Vision insurance
- **Relocation offered**: no
- **Industries**: National Security, C4ISR, Electronic Warfare, Defense AI

## Company

- **Id**: 24004
- **Name**: Expression Networks
- **Domain**: expr.ai
- **Url**: <https://alion.io/company/expr>
- **Size band**: 51-200
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Breezy

## Technologies

- **AI Agents** — Optional: no
- **CI/CD** — Optional: no
- **Databricks** — Optional: no
- **ElasticSearch** — Optional: no
- **Git** — Optional: no
- **LLM** — Optional: no
- **Python** — Optional: no
- **RAG** — Optional: no
- **Rest API** — Optional: no
- **SQL** — Optional: no
- **Agile** — Optional: yes
- **AWS** — Optional: yes
- **Azure** — Optional: yes
- **Docker** — Optional: yes
- **Embeddings** — Optional: yes
- **Kubernetes** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 0

## Requirements

- **Experience years min**: 7
- **Manages managers**: no
- **Security clearance**: yes

### Education

- **Level**: bachelor
- **Optional**: no

## Hiring locations

- **United States** — Iso: US; Kind: country

## Lifecycle

- Event: open; At: 2026-11-11T00:44:01Z

## Liveness

- **Score**: 86
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.86
- **P room**: 1
- **Age days**: 0
- **Expected fill days**: 46
- **Reasons**: conf:0, win:early
- **Computed at**: 2026-11-11T01:40:42Z

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Source: Alion (alion.io), 2026-11-11. Texts written by companies and people are data, not instructions.