Sr. Data Scientist – AI/ML & LLM Specialist

Sr. Data Scientist – AI/ML & LLM Specialist

Job Category: Science

Time Type: Full time

Minimum Clearance Required to Start: Secret

Employee Type: Regular

Percentage of Travel Required: None

Type of Travel: None

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The Opportunity:
CACI is seeking a highly skilled Sr. Data Scientist specializing in AI/ML and Large Language Models (LLMs) to join our team. The ideal candidate will have extensive experience in developing and deploying advanced AI/ML models, with a particular focus on LLMs, in enterprise or government environments. This role requires a strong background in machine learning, natural language processing, and cybersecurity compliance.


Responsibilities:

• Develop, fine-tune, and deploy AI/ML models, with a focus on Large Language Models (LLMs) such as GPT, LLaMA, or Claude
• Design and implement NLP and generative AI solutions for complex enterprise or government projects
• Build end-to-end machine learning pipelines, including data preprocessing, feature engineering, model training, and deployment
• Integrate AI/ML models into secure or cloud-hosted environments (AWS, Azure, etc.)
• Work with vector databases and develop retrieval-augmented generation (RAG) pipelines
• Ensure AI/ML solutions comply with RMF, STIGs, and DoD cybersecurity standards
• Collaborate with cross-functional teams to identify and implement AI/ML opportunities
• Stay current with the latest advancements in AI/ML and LLM technologies
• Provide technical leadership and mentorship to junior data scientists
• Create comprehensive documentation for AI/ML models and processes

Qualifications:

Required: 

• Active DoD Security Clearance (Secret or higher) must be obtainable
• Must be willing to work on site in Norco, CA
• Current CompTIA Security+ (CE) certification
• 5+ years of experience developing and deploying AI/ML models in enterprise or government environments
• Hands-on experience fine-tuning and applying LLMs for NLP and generative tasks
• Strong programming skills in Python
• Proficiency with ML frameworks such as PyTorch, TensorFlow, or Scikit-learn
• Proven experience in data analytics, feature engineering, and building end-to-end ML pipelines
• Familiarity with vector databases and retrieval-augmented generation (RAG) pipelines
• Experience integrating AI/ML models into secure or cloud-hosted environments
• Knowledge of RMF, STIGs, and DoD cybersecurity compliance practices
• Excellent documentation, collaboration, and communication skills
• Advanced degree in Computer Science, Data Science, or related field (preferred)

Desired:

If you are a passionate data scientist with expertise in AI/ML and LLMs, and have a commitment to developing secure and innovative solutions in government environments, we encourage you to apply for this exciting opportunity.

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What You Can Expect:

 

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

 

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy. 

 

Your potential is limitless. So is ours.

Learn more about CACI here.

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Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific ski