AI Prompt Engineer

CACI • Laredo, TX

3d • Onsite

About The Position

CACI is seeking a forward-thinking AI Prompt Engineer to join a team delivering 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 engineer will translate operational challenges into practical AI solutions and work with multiple groups to integrate prompts that streamline manual processes. The role also involves testing and improving prompts, researching advances in generative AI, supporting fine-tuning and Retrieval Augmented Generation strategies, and troubleshooting unexpected model behavior.

The position is full-time and requires onsite work in Ashburn, Virginia and/or Washington, D.C. Applicants must be U.S. citizens able to pass a CBP background investigation. The proposed salary range is $50,500–$101,000. CACI describes its culture as emphasizing integrity, innovation, trust, flexibility, and continuous growth, with learning and development resources and comprehensive benefits.

Requirements

• Must be a U.S. citizen and able to pass a CBP background investigation, including checks for felony convictions, illegal drug use, and misconduct such as theft or fraud.
• Must be available to work onsite in Ashburn, Virginia 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 1 year of software development experience, internships, or relevant academic project work.
• At least 1 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, and 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 Retrieval Augmented Generation 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.
• Work with multiple groups to integrate prompts and streamline manual processes.
• Stay current on advances in large language models, generative AI, and prompt engineering techniques.
• Provide input and collaborate on model fine-tuning and Retrieval Augmented Generation 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 and development opportunities and resources.
• Healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.
• Competitive compensation and comprehensive benefits options designed to support employees and their families.

What This Job Offers

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