Senior Data Scientist,

Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. This role supports advancing health equity and, for Ireland-based staff, offers a hybrid work model allowing some in-office and remote work.

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• Apply advanced statistical and predictive modeling techniques to build, maintain, and improve multiple predictive detection engines in Optum Insight analytics
  
• Lead discovery processes with Data Scientists and partner with Payment Integrity Operations management to identify business requirements and expected outcomes
  
• Create and provide sound statistical analyses and frame business scenarios that are meaningful and impact critical business processes and decisions
  
• Contribute to the development of Agentic AI architectures to solve business challenges using new technologies
  
• Design sampling methodology, prepare data (data cleaning, univariate analysis, missing value imputation, etc.), identify appropriate analytic methodologies, develop predictive models and document processes and results
  
• Communicate analytics results and predictive models to business partners and clients
  
• Provide ongoing tracking and monitoring of model performance and recommend ongoing improvements to methods and algorithms
  

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• Proven experience in data science and building predictive models
  
• Proven experience in manipulating large datasets
  
• Proven experience in delivering production-grade AI/ML pipelines
  
• Demonstrated solid expertise in programming in Python and SQL
  
• Proven experience with distributed computing technologies such as PySpark
  
• Proven experience with Git / GitHub for version control
  

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• Proven experience with healthcare claims data
  
• Proven experience with Azure, Databricks, Snowflake, LLMs and/or similar tools
  
• Demonstrated problem-solving and analytical thinking skills
  
• Demonstrated organizational skills with the ability to be flexible and work with ambiguity
  

Please note you must currently be eligible to work and remain indefinitely without any restrictions in the country to which you are making an application. Proof will be required to support your application.

At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone—of every race, gender, sexuality, age, location and income—deserves the opportunity to live their healthiest life. Diversity creates a healthier atmosphere: Optum is an Equal Employment Opportunity employer and all qualified applicants will receive consideration for employment without regard to gender, civil status, family status, sexual orientation, disability, religion, age, race, and membership of the Traveller community, or any other characteristic protected by law. Optum is a drug-free workplace. © 2026 Optum Services (Ireland) Limited. xcfaprz All rights reserved.