Senior Data Scientist IV - Gen AI Development & Evaluation

Overview

At PNNL, our core capabilities are divided among major departments that we refer to as Directorates within the Lab, focused on a specific area of scientific research or other function, with its own leadership team and dedicated budget.

Our Science & Technology directorates include National Security, Integrated Discovery Sciences, and Energy and Environment. In addition, we have an Environmental Molecular Sciences Laboratory, a Department of Energy, Office of Science user facility housed on the PNNL campus.

The National Security Directorate (NSD) drives science-based, mission-focused solutions to take on complex,?real-world?threats to our nation and the world.

The AI and Data Analytics Division, part of the National Security Directorate, combines profound domain expertise and creative integration of advanced hardware and software to deliver computational solutions that address complex data and analytic challenges. Working in multidisciplinary teams, we connect foundational research to engineering to operations, providing the tools to innovate quickly and field results faster. Our strengths are integrated across the data analytics lifecycle, from data acquisition and management to analysis and decision support.

Responsibilities

The AI & Data Analytics division is seeking to hire a Senior Data Scientist. This role blends foundational research with real world implementation to address some of the most complex and consequential challenges at the intersection of artificial intelligence and national security. We support PNNL's mission by contributing to impactful, mission focused applied R&D projects that help tackle national challenges. Successful candidates will have the opportunity to grow professionally while working on diverse, mission-focused projects.

As a Senior Data Scientist, you will also serve as a senior technical leader leading mission-driven research, driving proposal development, and engaging directly with stakeholders. This role will require hands-on experience with or leading research leveraging model internals not just inference endpoints, such as direct engagement with model architectures, training pipelines, and weight-level optimization, or developing and deploying agentic AI solutions that leverage tool use, retrieval-augmented generation, multi-step reasoning, and autonomous decision-making workflows.

Work Location & Requirements

• Based in Richland, WA or Seattle, WA with onsite presence required

• Clearance required (see below for details

• Travel may be required for stakeholder engagement or project events

Key Responsibilities

• Lead innovative projects and programs developing and applying generative AI and foundation model development (pretraining, fine-tuning, agentic systems, and innovative training strategies) and evaluation (T&E, robustness) for key modalities such as:

• Transform hyperspectral imaging (HSI) and geospatial applications by harnessing advanced AI techniques to extract actionable intelligence from complex, multi-layered data.

• Drive breakthroughs in multi-int fusion-integrating diverse intelligence sources to deliver robust, mission-ready solutions that elevate operational capabilities and decision-making.

• Advance knowledge discovery, support decision intelligence, and enable robust analytical processes. This includes leveraging advanced AI techniques to extract, synthesize, and integrate insights from unstructured, semi-structured, or large-scale text and documents.

• Engage with stakeholders to understand project requirements and translate them into actionable technical approaches aligned with sponsor goals.

• Direct the design, development, and iteration on foundation model, frontier AI research, and agentic AI systems that address complex, real-world problems-especially those involving diverse data modalities such as remote sensing imagery, sensor fusion, and text.

• Apply deep expertise in model internals (e.g., tokenization, attention mechanisms, weight adaptation, and loss optimization) to customize and improve model performance for domain-specific applications.

• Lead evaluation and verification of AI and agentic systems across multiple axes, including standard performance metrics, uncertainty quantification, generalization to out-of-distribution settings, and mission-specific assurance criteria.

• Lead proposal development and business development through proposals and/or briefing sponsors.

• Serve as a technical resource and mentor to junior to senior staff within the team, fostering a collaborative research environment and mission awareness.

• Maintain awareness of emerging trends in AI, AI security, and national security to shape future research directions and identify new opportunities for impact.

Knowledge, Skills, and Abilities

• Demonstrated proficiency in leading proposals, writing technical reports, and communicating complex findings to diverse audiences (technical and executive).

• Knowledge of compute environments and their cybersecurity concerns; familiarity with secure ML ops, access control, and model/data governance.

• Demonstrated impact in Generative AI, Frontier AI, or foundation model research (e.g., peer reviewed publications, recognized awards, contributions to community standards).

• Deep knowledge of the current ML research landscape, especially AI safety, adversarial machine learning, xAI/interpretability, uncertainty quantification, and the science of deep learning.

• Hands on experience analyzing internal structures of deep learning models, particularly LLMs and large vision/multimodal models (tokenization, attention mechanisms, routing, weight adaptation, loss optimization) or modalities including hyperspectral imagery.

• Hands on experience with LLM/LVM/Foundation Model and Frontier AI evaluation, red teaming, uncertainty analysis, or safety control implementation.

• Experience designing and executing T&E campaigns for AI systems, including test planning, dataset curation, metrics, statistical analysis, and reproducibility.

Read more about AI and Data Analytics division:

Qualifications

Minimum Qualifications:

• BS/BA and 7+ years of relevant work experience -OR-

• MS/MA and 5+ years of relevant work experience -OR-

• PhD with 3+ years of relevant experience

Preferred Qualifications:

• Degree in computer science, statistics, mathematics, or related fields.

• Experience serving as PI, technical lead, or project manager for federally funded R&D projects, with publications, open source contributions, or deployable prototypes.

• Knowledge of compute environments and their cybersecurity concerns; familiarity with secure ML ops, access control, and model/data governance.

• Experience designing and executing T&E campaigns for AI systems, including test planning, dataset curation, metrics, statistical analysis, and reproducibility.

• Software engineering foundations: Python, ML frameworks (PyTorch/TensorFlow), experiment tracking, and data pipeline tooling.

• Familiarity with agentic AI safety (tool-use governance, retrieval hygiene, autonomous decision workflows) and evaluation of multi-step reasoning systems.

• Prior work in national security environments, with an understanding of mission needs and operational constraints.

• Active DOE Q or TS/SCI clearance.

Hazardous Working Conditions/Environment

Not applicable.

Additional Information

This position requires the ability to obtain and maintain a federal security clearance.

A security clearance background investigation includes review of your employment, education, financial, and criminal history, as well as interviews with you and your personal references, neighbors, and co-workers to determine trustworthiness, reliability, and loyalty to the United States. The investigation also examines your foreign connections, drug and alcohol use, foreign influence, and overall conduct.

Requirements:

• U.S. Citizenship

• Background Investigation: Applicants selected will be subject to a Federal background investigation and must meet eligibility requirements for access to classified matter in accordance with 10 CFR 710, Appendix B.

• Drug Testing: All Security Clearance positions are Testing Designated Positions, which means that the applicant selected for hire is subject to pre-employment drug testing, and post-employment random drug testing. In addition, applicants must be able to demonstrate non-use of illegal drugs, including marijuana, for the 12 consecutive months preceding completion of the requisite Questionnaire for National Security Positions (QNSP).

Note: Applicants will be considered ineligible for security clearance processing by the U.S. Department of Energy if non-use of illegal drugs, including marijuana, for 12 months cannot be demonstrated.

"Referral Eligible"

Testing Designated Position

This position is a Testing Designated Position (TDP). The candidate selected for this position will be subject to pre-employment and random drug testing for illegal drugs, including marijuana, consistent with the Controlled Substances Act and the PNNL Workplace Substance Abuse Program.

About PNNL

Pacific Northwest National Laboratory (PNNL) is a world-class research institution powered by a highly educated, diverse workforce committed to the values of Integrity, Creativity, Collaboration, Impact, and Courage. Every year, scores of dynamic, driven people come to PNNL to work with renowned researchers on meaningful science, innovations and outcomes for the U.S. Department of Energy and other sponsors; here is your chance to be one of them!

At PNNL, you will find an exciting research environment and excellent benefits including health insurance, and flexible work schedules. PNNL is located in eastern Washington State-the dry side of Washington known for its stellar outdoor recreation and affordable cost of living. The Lab's campus is only a 45-minute flight (or ~3 hour drive) from Seattle or Portland, and is serviced by the convenient PSC airport, connected to 8 major hubs.

Commitment to Excellence and Equal Employment Opportunity

Our laboratory is committed to fostering a work environment where all individuals are treated with fairness and respect while solving critical challenges in fundamental sciences, national security, and energy resiliency. We are an Equal Employment Opportunity employer.

Pacific Northwest National Laboratory (PNNL) is an Equal Opportunity Employer. PNNL considers all applicants for employment without regard to race, religion, color, sex, national origin, age, disability, genetic information (including family medical history), protected veteran status, and any other status or characteristic protected by federal, state, and/or local laws.

We are committed to providing reasonable accommodations for individuals with disabilities and disabled veterans in our job application procedures and in employment. If you need assistance or an accommodation due to a disability, contact us at View email address on click.appcast.io .

Drug Free Workplace

PNNL is committed to a drug-free workplace supported by Workplace Substance Abuse Program (WSAP) and complies with federal laws prohibiting the possession and use of illegal drugs.

If you are offered employment at PNNL, you must pass a drug test prior to commencing employment. PNNL complies with federal law regarding illegal drug use. Under federal law, marijuana remains an illegal drug. If you test positive for any illegal controlled substance, including marijuana, your offer of employment will be withdrawn.

Security, Credentialing, and Eligibility Requirements

As a national laboratory, PNNL is responsible for adhering to the Homeland Security Presidential Directive 12 (HSPD-12) and Department of Energy (DOE) Order 473.1A, which require new employees to obtain and maintain a HSPD-12 Personal Identify Verification (PIV) Credential. To obtain this credential, new employees must successfully complete the applicable tier of federal background investigation post hire and receive a favorable federal adjudication. The tier of federal background investigation will be determined by job duties and national security or public trust responsibilities associated with the job. All tiers of investigation include a declaration of illegal drug activities, including use, supply, possession, or manufacture within the last 1 to 7 years (depending on the applicable tier of investigation). Illegal drug activities include marijuana and cannabis derivatives, which are still considered illegal under federal law, regardless of state laws.

For foreign national candidates:

If you have not resided in the U.S. for three consecutive years, you are not eligible for the PIV credential and instead will need to obtain a favorable Local Site Specific Only (LSSO) Federal risk determination to maintain employment. Once you meet the three-year residency requirement thereafter, you will be required to obtain a PIV credential to maintain employment. The tier of federal background investigation required to obtain the PIV credential will be determined by job duties at the time you become eligible for the PIV credential.

Mandatory Requirements

Please be aware that the Department of Energy (DOE) prohibits DOE employees and contractors from having any affiliation with the foreign government of a country DOE has identified as a "country of risk" without explicit approval by DOE and Battelle. If you are offered a position at PNNL and currently have any affiliation with the government of one of these countries, you will be required to disclose this information and recuse yourself of that affiliation or receive approval from DOE and Battelle prior to your first day of employment.

Rockstar Rewards

Employees and their families are offered medical insurance, dental insurance, vision insurance, robust telehealth care options, several mental health benefits, free wellness coaching, health savings account, flexible spending accounts, basic life insurance, disability insurance*, employee assistance program, business travel insurance, tuition assistance, relocation, backup childcare, legal benefits, supplemental parental bonding leave, surrogacy and adoption assistance, and fertility support. Employees are automatically enrolled in our company-funded pension plan* and may enroll in our 401 (k) savings plan with company match*. Employees may accrue up to 120 vacation hours per year and may receive ten paid holidays per year.

• Research Associates excluded.

**All benefits are dependent upon eligibility.

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Notice to Applicants

PNNL lists the full pay range for the position in the job posting. Starting pay is calculated from the minimum of the pay range and actual placement in the range is determined based on an individual's relevant job-related skills, qualifications, and experience. This approach is applicable to all positions, with the exception of positions governed by collective bargaining agreements and certain limited-term positions which have specific pay rules.

As part of our commitment to fair compensation practices, we do not ask for or consider current or past salaries in making compensation offers at hire. Instead, our compensation offers are determined by the specific requirements of the position, prevailing market trends, applicable collective bargaining agreements, pay equity for the position type, and individual qualifications and skills relevant to the performance of the position.

Minimum Salary

USD $166,800.00/Yr.

Maximum Salary

USD $275,200.00/Yr.