Jobs in the United States

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Added 1 min ago
Manager Electronics Engineering 3
Northrop Grumman
San Diego
The successful candidate will have personally executed hardware and electrical engineering activities as an engineer and led teams of hardware engineers, while operating as a…
Added 1 min ago
Engineer Systems/Principal Engineer Systems (Performance Analysis) - AHT
Northrop Grumman
Huntsville
An NGC DS Systems Engineer performs technical planning, system integration, verification and validation, cost and risk, and supportability and effectiveness analyses for total systems.…
Added 1 min ago
Principal / Senior Principal Systems Engineer
Northrop Grumman
Los Angeles
…Systems (NGMS) is seeking a Principal or Senior Principal Systems Engineer to join our team based in Woodland Hills, CA. The ideal candidate will have a strong background in…
Added 1 min ago
Electrical Systems Engineer
Northrop Grumman
Stafford
Northrop Grumman Defense Systems is seeking an Electrical Systems Engineer to work for our Whisper program at a government customer site in Stafford, Virginia.
Added 1 min ago
Senior Staff Radar Modeling Simulation & Analysis Systems Engineer
Northrop Grumman
Baltimore
…a Senior Staff Radar Modeling Simulation & Analysis Systems Engineer to join our team of qualified and diverse individuals. This position will be in Baltimore, MD, and is a full time on…
Added 1 min ago
Principal / Senior Principal Systems Engineer
Northrop Grumman
Los Angeles
…seeking a highly skilled Principal or Senior Principal Systems Engineer to join our team in Woodland Hills, CA. The ideal candidate will have a strong background in systems engineering…
Added 2 mins ago
Space TS/SCI Operations and Maintenance SEIT Lead (Level 5)
Northrop Grumman
Rolling Meadows
Must have an active U.S
Added 2 mins ago
Test Engineer / Principal Test Engineer - Lab Manager
Northrop Grumman
Baltimore
Northrop Grumman Mission Systems' Baltimore and Partnered Sites (BaPs) division is seeking a Test Engineer Lab Manager in Baltimore, MD. This position supports laboratory operations, test…
Added 2 mins ago
Staff Engineer Systems
Northrop Grumman
McLean
Must have U.S
Added 2 mins ago
Principal / Sr. Principal Electrical Engineer - 20703
Northrop Grumman
Roy
Provide technical support to Manufacturing, Procurement, Lab Integration, and Test organizations.
Added 2 mins ago
Northrop Grumman (SkillBridge) - Principal Network Cloud Communications
Northrop Grumman
Redondo Beach · Melbourne · Linthicum Heights · Rolling Meadows
…Solutions team. The selected candidate will support the design, integration, security, sustainment, and operational performance of classified network environments spanning Microsoft Azure –…
Added 2 mins ago
NG
2027 Electromechanical Engineer Intern - Rolling Meadows IL
Northrop Grumman
Rolling Meadows
- $25.5 to $38 USD / hour
Hardware Integration, Test Fixtures, & Vendor Support
Added 2 mins ago
Staff Electro-Optics Infrared (EO/IR) Engineer
Northrop Grumman
Melbourne
Must have an active US Government Secret Clearance (with a background investigation within the past 6 years or enrolled into Continuous Evaluation)
Added 2 mins ago
Principal Electrical Engineer 3 – Electrical Ground Support Equipment (EGSE)
Northrop Grumman
Chandler
Northrop Grumman Space Systems is currently seeking an experienced Principal Electrical Engineer to join our electrical ground support equipment group in our Chandler, AZ facility. Our…
Added 2 mins ago
Sentinel - Sr Principal Systems Engineer - 18016
Northrop Grumman
Roy
Northrop Grumman Defense Systems is seeking a Principal / Sr. Principal Systems Engineer. This opening is in Roy, UT and will support the Sentinel Program. Northrop Grumman supports the Air…
Added 2 mins ago
Principal / Sr. Principal Electromechanical Engineer - Flight Test ECS
Northrop Grumman
Edwards AFB
Must have an active US Government Secret clearance (with a background investigation within the past 6 years or enrolled into Continuous Evaluation)
Added 2 mins ago
Principal Systems Engineer 3 /Sr. Principal Systems Engineer 4
Northrop Grumman
Oklahoma City
This Principal Systems Engineer 3/4 position is for an individual contributor within a multi-disciplinary engineering team. Responsibilities include conducting research, writing…
Added 2 mins ago
Systems Integration & Test Engineers (SI&T) - 2nd Shift
Northrop Grumman
Baltimore
Northrop Grumman Mission Systems' Baltimore and Partnered Sites (BaPs) division is seeking a Systems Integration & Test (SI&T) Engineer (2nd shift) in Baltimore, MD to support test and…
Added 2 mins ago
Principal Aeronautical Engineer - Flight Test VMS
Northrop Grumman
Edwards AFB
Must have an active US Government Secret clearance (with a background investigation within the past 6 years or enrolled into Continuous Evaluation)
Added 2 mins ago
System Integration & Test Engineer
Northrop Grumman
Melbourne
Must have an active US Government clearance (with a background investigation within the past 6 years or enrolled into Continuous Evaluation)
Added 2 mins ago
Staff Systems Engineer - TRMC Systems Engineering Lead
Northrop Grumman
San Diego
Must have experience leading a team of 10+ individuals in a technical environment · Must have the ability to obtain and maintain Special Access Program (SAP) clearance within a reasonable amount of time as determined by business needs
Added 2 mins ago
Principal Subsystems Engineer
Northrop Grumman
San Diego
Must have systems engineering processes experience at the sub-system, system and system-of-systems levels · Must have experience with installation, integration and troubleshooting of aviation related subsystems
Added 2 mins ago
Principal/Sr Principal Electrical Engineer - 20350 & 20351
Northrop Grumman
Roy
Northrop Grumman Defense Systems is seeking an Principal/ Sr. Principal Electrical Engineer in support of the Sentinel program. This position is located: Roy, UT.
Added 2 mins ago
E
Lead Software Engineer
Evercommerce
Denver, CO
- $203,798 USD / year
Must have U.S
Added 2 mins ago
Sr Principal Engineer Aeronautical - Flight Test VMS
Northrop Grumman
Edwards AFB
Must have an active US Government Secret clearance (with a background investigation within the past 6 years or enrolled into Continuous Evaluation)

Expression

Senior AI Engineer

Shirlington, VA, United States

$180,000 to $210,000 USD / year

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Job details

Pay: $180,000 to $210,000 USD / year
Posting language: English
Posted: Nov 11, 2026

Original job description

Expression is seeking experienced Senior AI Engineers to design, develop, integrate, and evaluate advanced Artificial Intelligence (AI) and Large Language Model (LLM) capabilities supporting the Department of Homeland Security (DHS). This position will support the implementation of secure, mission-focused AI applications within the DHS AI environment. The Senior AI Engineers will develop and integrate multi-agent AI workflows, retrieval-augmented generation (RAG), intelligent document-processing capabilities, and AI evaluation frameworks to support investigative analysis, information retrieval, report generation, and human decision support. We are seeking hands-on engineers with expertise in one or more of three technical areas:

Multi-agent orchestration and model integration
RAG and AI-powered application development
AI assurance, evaluation, and observability

The ideal candidate has a strong software engineering foundation, experience delivering enterprise AI applications, and the ability to translate complex technical requirements into secure, reliable, maintainable software. You will collaborate with AI architects, data engineers, and Government stakeholders to build, test, and improve production-quality AI capabilities within an established enterprise environment. Security Clearance: Secret clearance required with eligibility for TS/SCI. Location: Shirlington, VA Required Qualifications

Bachelor's degree in Computer Science, Software Engineering, Computer Engineering, Data Science, Artificial Intelligence, or a related technical field, or equivalent relevant professional experience.
9+ years of professional experience in software engineering, AI engineering, or AI test automation, including substantial recent hands-on experience developing, integrating, or evaluating enterprise AI applications.
Demonstrated experience building, deploying, or evaluating LLM-powered and generative AI solutions in enterprise or production-oriented environments, with direct responsibility for implementation rather than solely research, experimentation, or architectural planning.
Strong Python programming and debugging skills, including backend development, RESTful APIs, asynchronous programming, modular application design, and automated testing. Experience with FastAPI, Pydantic, asyncio, or comparable technologies.
Demonstrated hands-on expertise in at least one of the following AI engineering specializations:

•

Multi-Agent Orchestration & Model Integration: Developing multi-agent AI applications using LangGraph, LangChain, Semantic Kernel, AutoGen, or comparable frameworks; implementing model/tool integrations, structured agent handoffs, stateful workflows, prompt management, and bounded execution.
Grounded AI Applications & RAG: Designing and implementing RAG pipelines, document processing, source-grounded generation, prompt/output validation, citation handling, and AI-assisted document generation or human-reviewed workflows.
AI Assurance, Evaluation & Observability: Developing automated LLM evaluation frameworks, regression suites, model reliability tests, adversarial testing, prompt-injection defenses, and application observability capabilities.
Experience integrating AI applications with enterprise data platforms, APIs, or retrieval services, including secure access to structured or unstructured data.
Experience designing and implementing secure AI applications, including authentication, authorization, permission-aware data access, sensitive-data handling, and appropriate human oversight.
Experience with LLM application evaluation and reliability, including response quality, factual grounding, hallucination mitigation, error handling, and model performance measurement.
Experience with modern software engineering practices, including Git, code reviews, CI/CD pipelines, automated testing, and software configuration management.
Experience developing or deploying cloud-native or containerized applications using Docker, AWS, Azure, Kubernetes, or comparable technologies.
Demonstrated ability to translate technical requirements into production-quality AI software components, integration designs, test cases, and engineering documentation.
Strong analytical, troubleshooting, and communication skills, including the ability to collaborate with AI architects, data engineers, and technical stakeholders to resolve complex integration challenges.

Preferred Qualifications

Experience integrating AI applications with Palantir, Databricks, Elasticsearch, or comparable governed enterprise data platforms.
Experience implementing Responder–Evaluator–Reporter architectures, multi-model ensembles, model comparison, or structured AI output verification.
Experience with LLMOps platforms, prompt/model version management, evaluation tooling, and reproducible AI release processes.
Experience supporting Federal Government, Department of Defense, Intelligence Community, Department of Homeland Security, or similarly regulated environments.
Familiarity with Government cybersecurity, privacy, accessibility, data governance, and software authorization requirements.
Experience adapting existing AI algorithms, research prototypes, or software components into operational enterprise applications.
Experience supporting technical demonstrations, Government acceptance testing, operational pilots, or production AI system sustainment.

Benefits:

Expression offers competitive salaries and benefits, such as:

401k matching
PPO and HDHP medical/dental/vision insurance
Education reimbursement up to $10,000/yr
Complimentary life insurance
Generous PTO and 11 days of holiday leave
Commuter Benefits Plan

About Expression:

Founded in 1997 and headquartered in Washington DC, Expression provides data fusion, data analytics, AI/ML, software engineering, information technology, and electromagnetic spectrum management solutions to the U.S. Department of Defense, Department of State, and national security community. Expression’s culture focuses on creating immediate and sustainable value for our clients via agile delivery of tailored solutions built through constant engagement with our clients. Expression was ranked #1 on the Washington Technology 2018's Fast 50 list of fastest-growing small business Government contractors and a Top 20 Big Data Solutions Provider by CIO Review. We make sure to provide everyone with the tools and opportunities to grow while working on some of the newest technologies in the industry. We get excited about celebrating our professionals' milestones, accomplishments, promotions, overcoming challenges, and many other aspects that make an engaging collaborative environment. Equal Opportunity Employer/Veterans/Disabled Expression is an Equal Opportunity Employer. If you require a reasonable accommodation during the application or interview process, please submit your request to our Human Resources department through the application portal.

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Jobs in the United States