Senior Data Scientist – Onsite Fusion AI for Real-Time Ops

Helion Energy; Everett (WA); Hybrid; USD 150,000 - 230,000; Full time

Benefits offered by this job

Medical/Dental/Vision plans

31 PTO days (vacation + sick)

10 paid holidays

401(k) match up to 5%

Disability & life insurance

Parental leave and support

Wellness stipend

Job summary

Helion Energy in Everett, WA is seeking a senior data/AI-focused data scientist to build the knowledge foundation for engineers to understand and optimize fusion systems. You will transform complex experimental and operational data into structured datasets and AI-enabled tools to support analysis and decision-making.

You will collaborate with engineers, scientists, and operators to develop data schemas, prototypes for anomaly detection, and scalable data pipelines.

Qualifications

• 7+ years of experience applying statistics, data science, and quantitative methods to hardware, physics, or engineering data.
• Experience analyzing operational, experimental, and time-series data to identify trends and inform decisions.
• Ability to translate ambiguous problems into practical, scalable solutions and collaborate with engineers/scientists.
• Proficiency in Python and modern data science tooling, with experience building data pipelines or analytics infrastructure.
• Experience developing structured representations of information, including data models, schemas, or ontologies.
• Familiarity with LLM APIs and AI techniques such as RAG, embeddings, semantic search, and AI-powered workflow automation.

Responsibilities

• Analyze real-time and historical system data to provide control room operators with actionable insights.
• Develop data schemas, ontologies, and metadata frameworks to organize information.
• Prototype decision-support tools for anomaly detection, experiment comparison, and reporting.
• Define metrics and evaluation frameworks for AI models and solutions.
• Collaborate with software engineering to build AI-powered workflows using operational data.
• Maintain data pipelines transforming diverse data sources into analytics-ready datasets.

Skills

Statistics

Data Science

Python

Data Pipelines

Ontologies & Data Models

LLM APIs

AI tooling

Tools

SQL

Airflow

Pandas/Numpy

TensorFlow/PyTorch

Job description

Helion Energy in Everett, WA is seeking a senior data/AI-focused data scientist to build the knowledge foundation for engineers to understand and optimize fusion systems. You will transform complex experimental and operational data into structured datasets and AI-enabled tools to support analysis and decision-making.

You will collaborate with engineers, scientists, and operators to develop data schemas, prototypes for anomaly detection, and scalable data pipelines.