AI Prompt Engineer

CACI • Long Beach, CA

12d • Onsite

About The Position

CACI is seeking a forward-thinking AI Prompt Engineer to develop innovative AI solutions in support of U.S. Customs and Border Protection (CBP). The role applies generative AI technologies to help modernize how frontline personnel access information, make decisions, and perform their work. Using AI-powered tools and large language models, the engineer will develop solutions intended to improve efficiency, enhance situational awareness, and accelerate access to mission-critical information.

The position is part of CACI’s Agile Solution Factory, a collaborative environment focused on rapid innovation, experimentation, and continuous learning. The AI Prompt Engineer translates operational challenges into practical AI solutions and works with multiple groups to integrate prompts that streamline manual processes. The role is onsite in Ashburn, Virginia and/or Washington, D.C., and requires U.S. citizenship and the ability to pass a CBP background investigation. Travel may be up to 10%.

Requirements

• U.S. citizenship and ability to pass a CBP background investigation. The investigation includes checks for felony convictions over the prior three years and illegal drug use or misconduct such as theft or fraud over the prior year.
• Availability to work onsite in Ashburn, VA and/or Washington, D.C.
• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field; equivalent experience may be considered in lieu of a degree.
• At least one year of software development experience, internships, or relevant academic project work.
• At least one year of hands-on experience with large language models, such as OpenAI GPT series, Llama, or Gemini, or other generative AI models.
• Experience with at least one programming language, such as Python or JavaScript/TypeScript.
• Familiarity with prompt engineering techniques, including few-shot prompting, chain-of-thought, structured outputs, or function calling.

Nice To Haves

• Problem-solving skills and a data-driven approach to experimentation and optimization.
• Written and verbal communication skills, including the ability to explain complex technical concepts clearly.
• Ability to work independently and collaboratively in a fast-paced, evolving environment.
• Exposure to RAG concepts, including embeddings and vector databases.
• Understanding of AI safety considerations, such as prompt injection, bias, and data privacy.
• Exposure to Agile/Scrum development environments.

Responsibilities

• Develop, refine, and iterate on prompts for generative AI models to elicit desired behaviors, responses, and creative outputs.
• Test prompt variations, analyze results, and drive continuous improvement.
• Collaborate with multiple groups to integrate prompts and streamline manual processes.
• Stay current on advancements in large language models, generative AI, and prompt engineering techniques.
• Provide input and collaborate on model fine-tuning and Retrieval Augmented Generation (RAG) strategies to improve accuracy.
• Debug unexpected model behaviors and identify root causes in prompt structure, model limitations, or data context.

Benefits

• Flexible time off benefit.
• Learning resources and learning and development opportunities.
• Healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.
• Competitive compensation and benefits designed to support employees and their families.

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level