Numerical Modeler (Coastal/Marine)

Numerical Modeler (Coastal / Marine) (full-time, fixed-term)

Location: Remote; US Eastern Time hours required

Term: 12-month fixed-term

Salary Range: $70 - $94k USD

Start Date: April, 2026 or thereafter

Apply By: April 17, 2026

We encourage members of groups historically underrepresented in science and engineering to apply to this role.

Hourglass Climate is a USA-based non-profit organization with the mission to strategically research the safety and efficacy of mineral-based Ocean Alkalinity Enhancement (OAE) techniques for responsible carbon removal and climate impact at scale.

The ocean is our greatest resource for capturing hard-to-abate, and historical, carbon dioxide emissions, a non-negotiable part of limiting climate warming to 2ºC, according to the Intergovernmental Panel on Climate Change (IPCC). OAE via alkaline minerals has the potential for permanent, gigatonne-scale carbon dioxide removal (CDR) with significant co-benefits such as a reduction in ocean acidification. However, targeted, independent and integrated research that rapidly de-risks the key uncertainties around OAE techniques is urgently needed. To do just that, Hourglass brings together an ecosystem of scientists to conduct model, laboratory, and field research for the public benefit.

Job Description:

Much of Hourglass Climate’s research is focused on mineral-based OAE strategies that use alkaline rocks and minerals dissolved in seawater to remove atmospheric carbon dioxide. Tracking the transport fate of these minerals when deployed is an essential component of robust carbon removal quantification, as well as environmental impact quantification. Hourglass is seeking an experienced Numerical Modeler (Coastal / Marine) (fixed-term, 12 months) to support the sediment transport programs within the organisation. These programs are focused on building our knowledge around sediment transport processes relevant to OAE projects, contributing to the design of OAE pilot projects and developing sediment transport-related components of our extensive monitoring programs. 

The role is desk-based, with a focus on numerical modeling and the analysis of field data. The successful candidate will lead the development and application of numerical models (e.g. Delft3D, OceanTracker) to understand sediment transport processes and pathways in coastal / marine environments, informed and validated by field observations where available. Experience with lagrangian particle tracking models is particularly desirable. Model outputs and data analyses will be used to support OAE field trial design, including advising on and deploying appropriate instrumentation for sediment tracking, as well as interpretation of field trial outcomes. 

The ideal candidate will be able to work independently in a fast-paced environment, and will take clear ownership of the projects they are responsible for. While able to work independently, we are looking for a collaborative team member with a “no-task-too-small” mindset who actively supports colleagues and contributes to our positive, high-performing team. Hourglass’ projects are highly interdisciplinary and successful collaboration with specialists across disciplines is critical.

This is a remote position. However, to maintain a high level of collaboration, the successful candidate must be available to work, at a minimum, during a 5-hour window aligned with US Eastern Time, three days a week. Outside of these required collaboration blocks, this position offers the flexibility to design a schedule that works best for your local time zone.

The ideal candidate will easily fulfill the responsibilities of this position (as described below) and have the following qualities and experience:

Responsibilities:

• Lead numerical modeling (e.g. Delft3D, OceanTracker) workflows, including model development, calibration, scenario development, data extraction and technical interpretation of results
• Apply lagrangian particle tracking models to determine and predict sediment transport pathways at OAE pilot sites
• Work closely with other disciplines within the organisation in the delivery of modeling results
• Advance the design and implementation of the sediment transport aspects of our OAE monitoring programs
• Provide technical input into Hourglass’ projects, with regards to sediment transport processes and hydrodynamics
• Support oceanographic data acquisition activities, including advising on data needs and appropriate instrumentation, with the potential to support data collection in the field
• Contribute to modeling in support of research permit applications
• Communicate scientific findings through technical documentation and conference presentations
• Contribute to publications consisting of rigorous and high-quality datasets in collaboration with the science team.
• Contribute & Collaborate: bring a depth of knowledge and ideas to projects across Hourglass’s sediment transport programs. The ideal candidate will be curious and motivated to share their knowledge and apply it in new ways.

Minimum Qualifications:

• PhD (or equivalent research/industry experience) in Physical Oceanography, Coastal Engineering, Marine Science or similar discipline
• Expertise in sediment transport processes within coastal or ocean environments
• Demonstrated experience applying numerical models to simulate hydrodynamics and sediment transport processes
• Programming skills for complex scientific data processing, analysis and visualization (e.g. Python, MATLAB) 
• Proficiency with GIS tools for data analysis and interpretation
• Knowledge of field instrumentation and methodologies for sediment transport monitoring
• Ability to work independently and manage multiple technical priorities
• Hands-on, problem-solving attitude; willingness to step in and support no matter the task
• Commitment to upholding the highest scientific standards, meticulous attention to detail in planning and procedure

Preferred Qualifications:

• Demonstrated experience applying the Delft3D modelling suite specifically to simulate hydrodynamics and sediment transport processes
• Field experience in sediment transport data acquisition within coastal or marine environments.
• Broad scientific interest - e.g., eager to apply experimental findings to improve field protocols, build novel monitoring tools, expose gaps in the OAE knowledge base and propose ways to fill them, etc.

Compensation:

Salary is based on the candidate's experience and ranges from $70 - $94k USD for US-based candidates. Please note that the final compensation for international hires is calculated based on local benchmarks. This ensures internal equity across our global team while remaining competitive within your local economy.

Equity, Diversity, and Inclusion: 

Hourglass is an Equal Opportunity Employer. Hourglass is dedicated to transparent recruitment, hiring, and promotion processes. Candidates with diverse backgrounds and experiences are strongly encouraged to apply.

Apply:

To be considered for this position, please submit a CV and a cover letter to jobs@hourglassclimate.org with the position title in the subject line by April 17, 2026.