Sr. Data Scientist – AI/ML & LLM Specialist

Sr. Data Scientist – AI/ML & LLM Specialist

Job Category: Information Technology

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 skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. Learn more here.

The proposed salary range for this position is:

$90,300 - 189,600 USD

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.