Principal Data Scientist I

RELX Inc. Company; North Carolina; On-site; USD 118,000 - 220,000; Full time

Job summary

LexisNexis Legal & Professional is seeking a Principal Data Scientist I to lead analytic projects, finalize models for customers, and drive governance across AI initiatives. The role emphasizes mentoring, cross-team collaboration, and shaping innovative data solutions.

Ideal candidates will have extensive experience with LLMs, RAG, embeddings, and graph-based intelligence, and possess strong communication skills for senior stakeholders. Base pay reflects U.S.

Qualifications

• Experience with large language models and prompting/fine-tuning.
• Experience building retrieval-augmented generation and semantic search systems.
• Experience mentoring or leading teams and guiding colleagues.

Responsibilities

• Acting as a leader for analytic project and result sharing.
• Leading code reviews, acting as a final approver of models before reaching customers.
• Evaluating and creating new frameworks and defining methodologies and governance.
• Managing and leading small-to-medium sized teams, directly or indirectly.
• Setting a high-bar for model development.

Skills

LLMs

RAG

Knowledge graphs

Graph AI

Embeddings

Agentic AI

Agent design

Cost optimization

AI observability

Data governance

Stakeholder comms

Mentoring

Leadership

Project leadership

Job description

Principal Data Scientist I

Are you looking to develop your Data Scientist career? Would you like to be part of a team that innovates using technology?

Responsibilities

• Acting as a leader for analytic project and result sharing
• Leading code reviews, acting as a final approver of models before reaching customers
• Evaluating and creating new frameworks and defining methodologies and governance
• Managing and leading small-to-medium sized teams, directly or indirectly
• Setting a high-bar for model development

Requirements

• Large language models (prompting, fine-tuning, adaptation), LLM
• Advanced retrieval-augmented generation (hybrid search, ranking optimization), RAG
• Embedding strategies and semantic search systems
• Knowledge graph integration and graph-enhanced intelligence
• Agentic AI architecture, multi-step reasoning, autonomous agent orchestration, and long-running agent design with feedback loops, GenAI
• Evaluation science (offline metrics, human-in-the-loop systems)
• Cost-performance optimization
• AI observability and monitoring in production
• Data governance and compliance-aware system design
• Have excellent communication skills and the ability to convey information clearly to senior stakeholders
• Be a natural problem-solver and able to take a lead in collaborating to resolve issues
• Have experience in mentoring or training others, and acting as a subject matter expert to guide colleagues
• Have some management experience, including leading a team indirectly or directly
• Have significant experience in a Data Scientist role
• Have experience in leading complex projects and customer relationships

Compensation

U.S. National Base Pay Range: $118,300 - $219,800. Geographic differentials may apply in some locations to better reflect local market rates. This job is eligible for an annual incentive bonus.

We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.

We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.

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LexisNexis Legal & Professional is a leading global provider of legal, regulatory and business information and analytics that help customers increase productivity, improve decision-making and outcomes, and advance the rule of law around the world. We help lawyers win cases, manage their work more efficiently, serve their clients better and grow their practices. We assist corporations in better understanding their markets and preventing bribery and corruption within their supply chains. We partner with leading global associations and customers to help collect evidence against war criminals and provide tools to combat human trafficking. We endeavour to advance the rule of law across the world.Our teams are combining unparalleled legal and business information with analytics and technology to advance what’s possible for the way our customers work and to advance what’s possible in the world by strengthening the rule of law.