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Computer Modelling Group

Senior Reservoir Simulation Scientist

Calgary, AB, Canada

Job type: Full-time
Apply by: Nov 1, 2026
Posting language: English
Posted: Oct 2, 2026

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Applications open in a new tab.

Original job description

Summary

The Senior Reservoir Simulation Scientist will work as part of CMG’s CoFlow development team. CoFlow combines reservoir and production engineering simulation technologies to improve the overall productivity of engineering workflows for large, integrated assets. It enables oil and gas companies to better understand and develop petroleum resources through a unified approach.

The successful candidate will join a small development team responsible for the technologies supporting CoFlow’s well and production engineering capabilities.

Essential Responsibilities

Working as part of the CoFlow team and under the direction of the Development Team Lead, the employee will work within a small team of engineering software professionals. The team is responsible for the design, development, and maintenance of innovative technologies for simulating reservoirs, wells, and surface networks.

A primary responsibility of this position will be to maintain and extend CoFlow’s fluid modeling capabilities, including, but not limited to, black-oil, K-value, and equation of state fluid models; fluid blending strategies; flash calculations; fluid component lumping/de-lumping; and temperature and enthalpy formulations for thermal applications.

Additional responsibilities include:

Contribute to improving the team’s software development processes.
Work collaboratively with other CoFlow team members.
Understand the needs of reservoir and production engineers who use CoFlow.
Help develop clear specifications for new software features, including acceptance tests and release criteria.
Contribute to the design, implementation, testing, and maintenance of high-quality engineering software.

Note: This description reflects the general nature of the role. It’s not a complete list of responsibilities - we believe in flexibility, initiative, and growing together.

Knowledge and Skills

A minimum of 10 years of relevant professional experience developing engineering software, preferably involving thermodynamics, fluid modeling, reservoir engineering, or production engineering.
Proficiency in C++, Fortran, and/or C#, with the ability to work according to modern software engineering practices used within the project.
Strong teamwork and communication skills, with a willingness to learn and collaborate with others.
Experience with Agile software development methodologies and Test-Driven Development (TDD) is an asset.
Experience using AI-assisted software development tools, such as Claude or similar tools, is an asset.
Self-motivated and team-oriented, with a positive attitude and strong time-management skills.
Very good written and verbal communication skills in English.

Education

A Master’s degree or higher in Petroleum Engineering, Chemical Engineering, or a related discipline, or an equivalent combination of education and relevant experience.

Experience

Programming experience with C#, Fortran, and/or C++ is required.
Experience developing engineering software in a commercial environment.
Experience with commercial oil and gas engineering software is highly desirable.

Location

Calgary, AB, Canada

CMG Compensation and Benefits Overview - Canada

CMG’s total rewards program includes:

A competitive salary
A performance-based bonus program
Learning and development opportunities
RRSP contributions
Top of the line medical and dental benefits including a health spending account
20 days of vacation per year plus flex days
Choice of transit pass or underground parking (Calgary)
Car wash (Calgary)
Cafeteria and complimentary barista style coffee and more (Calgary)

No need to call us about the status of your application. We promise - we’re reviewing every submission, and if your skills are a match, you’ll hear from us!

We kindly request that external recruiters and agencies refrain from submitting unsolicited resumes or candidate profiles. Submissions without a signed agreement in place will not be considered and will become the property of CMG.

About Us

Innovators in Simulation Technology

CMG (TSX:CMG) is a global software and consulting company that combines science and technology with deep industry expertise to solve complex subsurface and surface challenges for the new energy industry around the world. CMG is headquartered in Calgary, AB, with offices in Houston, London, Dubai, Bogota, Rio de Janeiro, Bengaluru, and Kuala Lumpur. For more information, please visit https://www.cmgl.ca

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More about this job

Responsibilities

Maintain and extend CoFlow’s fluid modeling capabilities, including fluid models, blending, flash calculations, component lumping, and thermal formulations. Collaborate with the development team to specify, design, implement, test, and maintain high-quality engineering software and improve development processes.

Requirements

Requires at least 10 years of relevant experience developing engineering software, preferably in thermodynamics, fluid modeling, reservoir engineering, or production engineering, along with commercial software development experience. Requires proficiency in C++, Fortran, and/or C# and a master’s degree or higher in petroleum engineering, chemical engineering, or a related discipline, or equivalent education and experience.

Skills

C++
Fortran
C#
Thermodynamics
Fluid Modeling
Reservoir Engineering
Production Engineering
Engineering Software Development
Black-Oil Fluid Models
Equation Of State Models
Flash Calculations
Fluid Blending
Agile Software Development
Test-Driven Development
Teamwork
Communication

Benefits

Performance-Based Bonus
Learning And Development Opportunities
RRSP Contributions
Medical And Dental Benefits
Health Spending Account
20 Days Of Vacation
Flex Days
Transit Pass Or Underground Parking
Car Wash
Cafeteria
Complimentary Barista-Style Coffee

Visa sponsorship

Not detected in the job text

Keywords

CoFlow
Reservoir Simulation
Production Engineering
Reservoir Engineering
Engineering Software
C++
Fortran
C#
Thermodynamics
Fluid Modeling
Black-Oil Models
K-Value Models
Equation Of State
Fluid Blending
Flash Calculations
Component Lumping
Component De-Lumping
Thermal Applications
Temperature Formulations
Enthalpy Formulations
Agile
Test-Driven Development
Acceptance Testing
Oil And Gas
Surface Networks
Well Simulation
Commercial Engineering Software

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