**Overview**

PNNL's Earth System Science Division enables energy independence and national security through leadership in earth systems science, engineering,and decision analytics. Our work focuses on solving complex problems in the dynamic Earth system. Our interdisciplinary scientists steward abreadth of efforts that encompass research on plants to groundwater science and coastal zones, to storm prediction.

Our research focuses on understanding and mitigating operational risks at the interface of human and natural environments. This includespredicting the impacts of natural hazards and extreme climate events on Earth and human systems, along with the impacts of wildfire, flooding, sealevel rise and storm surges. We focus on understanding and mitigating environmental contamination and increasing the resiliency, security, andsustainability of water resources. We provide geointelligence through advanced sensing and data analytics to forecast complex system behaviors andoperational performance to understand human-natural systems. This includes informed decision making and enhanced community resilience,advanced monitoring, and remote sensing of environmental systems for energy and national security. It also includes developing energy systems,including geothermal energy, sustainable oil and gas production, storage and utilization, along with carbon sequestration.

Driven by a “science-to-solutions” philosophy, we provide scientific leadership and technology to enhance national security, mitigate natural hazardsand optimize disaster response. In the critical areas of energy, environment, intelligence, and defense, we deliver insights and decision supportthrough the development of tools and solutions.

**Responsibilities**

The Subsurface Fate and Transport Modeling Team within the Environmental Subsurface Science Group is seeking applications for a Post-Doctoral Research Associate position. Successful applicants will run multiphase reactive transport models within the open source PFLOTRAN simulator. They will collaborate with researchers employing PFLOTRAN to simulate multiphase fluid flow and reactive transport during CO2 injection into reactive rocks. This will involve modeling CO2 mineralization through complex reaction networks, applying diverse numerical techniques to model CO2 reactivity in fractured rock, and developing strategies for critical mineral extraction concurrent with CO2 storage. The research associate will also have the opportunity to engage in other project work in areas of contaminant fate and transport modeling, geothermal energy, nuclear waste disposal, and more.

Through their research, the associate will develop an internal and external network of collaborators and project partners and participate in professional societies at the regional and national level. The associate is expected demonstrate commitment to data quality and accuracy, strong written and oral communication skills, as evidenced by high-impact peer-reviewed publications and conference presentations, and be able to work independently and in a team setting. The applicant must demonstrate a strong ethic of service to the scientific community and a commitment to both scientific excellence and national impact on developing transformative science and technology solutions relevant to our nation’s energy security and prosperity. Finally, the position requires that the associate complies with PNNL policies regarding environmental health and safety, waste management, and protection of intellectual property.

The position is immediately available for 12 to 24 months, with the potential for an additional 12 months or transition to a permanent position, dependent upon available funding and sustained performance.

**Qualifications**

Minimum Qualifications:

+ Candidates must have received a PhD within the past five years (60 months) or within the next 8 months from an accredited college or university.

Preferred Qualifications:

+ The candidate must have experience simulating groundwater flow, reactive transport, and/or multiphase flow within the Earth’s subsurface.

+ Experience with geochemistry or geochemical transport modeling software (e.g., CrunchFlow, Geochemist’s Workbench, MINTEQA2, PFLOTRAN, PHREEQC, TOUGHREACT, etc.)

+ Experience modeling subsurface CO2 sequestration

+ Experience simulating subsurface Earth system processes (e.g., groundwater flow, solute transport, biogeochemical reaction)

+ Experience running PFLOTRAN

+ Experience with state of the art numerical methods

+ Experience with numerical methods for solving systems of nonlinear PDE’s (e.g., finite volume method, finite element method)

+ Python scripting experience (e.g. H5py, Matplotlib, NumPy, pandas, SciPy)

+ Experience with Linux-based operating systems

+ Experience with high performance computing

+ Experience programming in modern Fortran or C/C++ Demonstrated proficiency with verbal and written communications

**Hazardous Working Conditions/Environment**

Not Applicable.

**Additional Information**

Not Applicable.

**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, flexible work schedules and telework options. 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, Diversity, Equity, Inclusion, and Equal Employment Opportunity**

Our laboratory is committed to a diverse and inclusive work environment dedicated to solving critical challenges in fundamental sciences, national security, and energy resiliency. We are proud to be an Equal Employment Opportunity and Affirmative Action employer. In support of this commitment, we encourage people of all racial/ethnic identities, women, veterans, and individuals with disabilities to apply for employment.

Pacific Northwest National Laboratory considers all applicants for employment without regard to race, religion, color, sex (including pregnancy, sexual orientation, and gender identity), 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 [email protected] .

**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.

**HSPD-12 PIV Credential Requirement**

In accordance with Homeland Security Presidential Directive 12 (HSPD-12) and Department of Energy (DOE) Order 473.1A, new employees are required to obtain and maintain a HSPD-12 Personal Identity Verification (PIV) Credential. To obtain this credential, new employees must successfully complete and pass a Federal Tier 1 background check investigation. This investigation includes a declaration of illegal drug activities, including use, supply, possession, or manufacture within the last year. This includes marijuana and cannabis derivatives, which are still considered illegal under federal law, regardless of state laws.

**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, health savings account, flexible spending accounts, basic life insurance, disability insurance*, employee assistance program, business travel insurance, tuition assistance, 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 401k savings plan. Employees may accrue up to 120 vacation hours per year and may receive ten paid holidays per year.

* Research Associates excluded.

**Once eligibility requirements are met.

Click Here For Rockstar Rewards (https://careers.pnnl.gov/rockstar-rewards)

**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 $69,000.00/Yr.

**Maximum Salary**

USD $119,100.00/Yr.