Everforth ECS is seeking an AI Prompt Engineer to work in Arlington, VA.
ECS is seeking talented professionals to join our growing team supporting the Cybersecurity and Infrastructure Security Agency's (CISA) Technical Engineering and Support Services (TESS) program. TESS is CISA's integrated, capability-driven mission ecosystem designed to scale across mission and delivery spaces within the DHS/CISA/Cybersecurity Division.
Job DescriptionThe Prompt Engineer (Vulnerability & Risk Analytics) designs and governs AI-assisted workflows that accelerate the analysis of software vulnerability and risk data for the TESS program. Operating on-site in Arlington, VA, the engineer will utilize CISA-approved enterprise AI tools (primarily Microsoft Copilot) to transform complex security datasets into actionable intelligence. The position requires disciplined testing, structured framework design, and detailed documentation to ensure all AI outputs are reliable, secure, and reproducible in a federal cybersecurity environment.
Key Responsibilities- Structured Prompt Design: Craft, deploy, and refine structured system and user prompts utilizing advanced role-play and constraint strategies to support software vulnerability analysis, CVE/CWE parsing, and threat risk summaries.
- Model Optimization & Parametric Testing: Systematically test model outputs across varied enterprise temperature and grounding parameters to eliminate hallucinations in risk scoring and threat summarization.
- Governance & Prompt Library Management: Document prompt patterns, maintain a centralized, version-controlled repository of reusable prompts, and establish clear guidelines for when to apply specific techniques.
- Quality Gates & Reproducibility: Enforce rigorous validation and reproducibility rubrics to benchmark prompt accuracy, consistency, and repeatability across software supply chain and vulnerability data feeds.
- Operational Alignment: Translate manual CISA cybersecurity workflows into standardized AI-assisted templates to assist technical delivery teams and capability leadership.
Salary Range: $120,000 - $140,000
General Description of Benefits
Preferred Qualifications- Active Top Secret (TS) clearance with the ability to obtain DHS/CISA Suitability.
- 3+ years of professional experience working with AI/ML tools or large language models, with a strong preference for candidates supporting federal, defense, or intelligence organizations.
- Experience with Primary Tooling: CISA-approved AI toolsets (Enterprise Microsoft Copilot / M365 Copilot / GovCloud AI Environment)
- CompTIA Security+ or an equivalent CompTIA certification meeting DoD 8140/8570 IAT Level II requirements.
- Demonstrated expertise in generative AI prompt engineering techniques (such as chain-of-thought, few-shot framing, and system instructions) and prompt evaluation/testing methodologies.
- Proven capability to document, standardize, and scale repeatable technical practices for broader team adoption.
Skills Required
- Active Top Secret clearance with ability to obtain DHS/CISA Suitability
- 3+ years of professional experience working with AI/ML tools or large language models
- Experience with CISA-approved AI toolsets, including Enterprise Microsoft Copilot, Microsoft 365 Copilot, or a GovCloud AI environment
- CompTIA Security+ or equivalent CompTIA certification meeting DoD 8140/8570 IAT Level II requirements
- Expertise in generative AI prompt engineering techniques and prompt evaluation/testing methodologies
- Ability to document, standardize, and scale repeatable technical practices
ECS Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about ECS and has not been reviewed or approved by ECS.
-
Healthcare Strength — ECS advertises multiple national-network medical plan options with HSA eligibility alongside dental and vision coverage. Coverage generally begins quickly and is paired with company-paid short- and long-term disability, adding stability to the health package.
-
Retirement Support — A 401(k) with Safe Harbor and immediate vesting on employer contributions is emphasized, with an employer match available. Access to an employee stock purchase plan via the parent company provides an additional savings avenue.
-
Parental & Family Support — Paid parental leave up to 30 days, adoption assistance, and other family-oriented leaves are highlighted. Feedback suggests these offerings add meaningful value beyond base pay for many roles.
ECS Insights
What We Do
ECS, a segment of ASGN (NYSE: ASGN), delivers advanced solutions and services in cloud, cybersecurity, artificial intelligence (AI), machine learning (ML), application and IT modernization, and science and engineering. The company solves critical, complex challenges for customers across the U.S. public sector, defense, intelligence and commercial industries. ECS maintains partnerships with leading cloud, cybersecurity, and AI/ML providers and holds specialized certifications in their technologies. Headquartered in Fairfax, Virginia, ECS has more than 3,400 employees throughout the U.S. and has been recognized as a Top Workplace by The Washington Post for the last five years.
