San Francisco, California, United States · On-site
$100k–$160k/yr
About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the…
Skills: Process Modeling, Heat and Material Balance, Aspen Plus, Hysys, SysCAD
Blue Bell, South Dakota, United States · Remote OK
Senior CRA Phase I Oncology TX ICON is a global healthcare intelligence and clinical research organisation united by a mission to bring new medicines and treatments to patients faster. As a values-driven organisation, in…
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Houston, Texas, United States · Hybrid
$110k–$185k/yr
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Houston, Texas, United States · Hybrid
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Houston, Texas, United States · Hybrid
$200k–$245k/yr
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Houston, Texas, United States · Hybrid
$200k–$245k/yr
Job Description:About the Role: As Executive Director - Plastics Market Research & Analysis, you will be a member of the research leadership team responsible for developing and stewarding plastics market research and ana…
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Houston, Texas, United States · On-site
We are hiring a Research Associate (Full-time) to join the UTHealth Houston McGovern Medical School Department of Microbiology & Molecular Genetics in Houston, Texas. In this role, you will conduct research in the field …
Skills: Microbiology, Molecular Genetics, Bacterial Genetics, Molecular Cloning, Gene Expression Analysis
Houston, Texas, United States · On-site
$62/hr–$81/hr
Hiring Post: Supervising Pharmacy Transition Specialist Compensation: $62.66 to $81.46/hour Career Area: Pharmacy Location: Ben Taub Hospital, Houston, TX 77030 Position Type: Part-Time Job ID: 180075 BenefitsDay 1 medic…
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Houston, Texas, United States · On-site
Axalta has remained at the forefront of the coatings industry by continually investing in innovative solutions. We engineer technologies that protect customers’ products – whether they are battling heat, light, corrosion…
Skills: Laboratory Management, ISO-17025 Certification, Statistical Analysis, Design Of Experiment (DOE), Coating Characterization
Houston, Texas, United States · On-site
$73k–$109k/yr
Braun Intertec is looking for a Project Scientist to lead and manage environmental projects, including due diligence; spill response, assessment, and cleanup; soil & groundwater investigations, and remediation implementa…
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Houston, Texas, United States · Hybrid
$200k–$245k/yr
Job Description:About the Role: As Executive Director - Head of Specialty Chemical Markets Research & Analysis, you will be a member of the research leadership team responsible for developing and stewarding market resear…
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Houston, Texas, United States · Remote Solely
$100k–$120k/yr
Respicardia At ZOLL, we're passionate about improving patient outcomes and helping save lives. We provide innovative technologies that make a meaningful difference in people's lives. Our medical devices, software and rel…
Skills: Technical Support, Clinical Training, Patient Programming, Cardiac Rhythm Management, Implantable Device Support
Houston, Texas, United States · On-site
About the job: The Regional Account Manager, AHUS/HSCT-TMA position is within our Rare Hematology and Nephrology Franchise, a division of Alexion, AstraZeneca Rare Disease and will focus on aHUS and the potential launch …
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Houston, Texas, United States · On-site
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Skills: Abdominal Ultrasound, Obstetric Ultrasound, Gynecologic Ultrasound, Vascular Ultrasound, Doppler Studies
Houston, Texas, United States · On-site
$108k–$195k/yr
On the Human Health and Performance Contract we are at the forefront of safeguarding astronaut health, ensuring human performance, and advancing technologies for human space exploration. We are seeking a Spaceflight Data…
Skills: Bayesian Inference, Bayesian Decision Theory, Normative Decision Theory, Probabilistic Programming, Stan
Houston, Texas, United States · On-site
Position Summary: Assists with the day-to-day administrative project management and may provide scientific direction for research projects of considerable scope and complexity. Position Key Accountabilities: Essential Fu…
Skills: Project Management, Grant Proposal Writing, Budget Preparation, Data Management, Administrative Coordination
Houston, Texas, United States · On-site
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Skills: Laboratory Cleaning Techniques, Precision Cleaning, Particle Counting, Inventory Control, Cleanroom Protocol
Houston, Texas, United States · On-site
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Houston, Texas, United States · On-site
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Houston, Texas, United States · On-site
Axiom Space is a human space exploration company, building era-defining space infrastructure and delivering technology-driven solutions that will empower civilization to transcend Earth. Beginning with Axiom Station, suc…
Skills: Executive Operations, Calendar Management, Project Management, Strategic Planning, Written Communication
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Develop and optimize steady-state and dynamic process models for critical mineral refining using tools like ASPEN and SysCAD. Translate lab and pilot data into scalable models to drive the design of refining facilities and automate equipment sizing.
Requires a bachelor's degree or higher in Chemical, Mechanical, Process, or Metallurgical Engineering. Proficiency in process simulation software and a deep understanding of thermodynamics and reaction engineering are essential.
Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.
Mariana Minerals is seeking a highly motivated Process Modeling Engineer to support the development of next-generation refining processes for critical minerals — key to enabling the world’s energy transition.
In this role, you will be responsible for developing, validating, and optimizing heat and material balance models using tools such as ASPEN Plus/HYSYS, SysCAD, OLI Studio, or METSIM. You will work closely with R&D, pilot operations, and project execution teams to translate lab and pilot data into robust, scalable process models that drive the design of first-of-a-kind mineral refining facilities.
Develop steady-state and dynamic process models to establish heat and material balances for integrated mineral refinery systems using ASPEN, SysCAD, OLI, or METSIM.
Automate equipment and process sizing (reactors, heat exchangers, filters, crystallizers, evaporators, and separators) based on model outputs, linking models to datasheets and other engineering tools
Develop and maintain process simulation databases, ensuring consistency and traceability between modeling assumptions, test data, and engineering deliverables.
Calibrate and reconcile models using pilot or plant operating data to ensure model fidelity and predictive accuracy.
Conduct process optimization studies — evaluating energy/heat recovery, recycle strategies, and material efficiency improvements.
Develop dynamic process models to validate PLC and DCS programming and evaluate/optimize buffer sizing throughout the design.
Link process models to CAPEX and OPEX estimation tools, automating technoeconomic model development
Document modeling methodologies and results, providing clear technical communication for design reviews, techno-economic assessments, and regulatory submissions.
Bachelor's degree or higher in Chemical Engineering, Mechanical Engineering, Process Engineering, Metallurgical Engineering, or a closely related engineering discipline
Proficiency in one or more of the following process simulation tools:
ASPEN Plus / HYSYS
SysCAD
OLI Studio / OLI Flowsheet
Deep understanding of mass transfer, heat transfer, thermodynamics, fluid flow, and reaction engineering.
Experience developing material and energy balances for multi-step, integrated process systems.
Strong grasp of chemical equilibria and phase behavior in aqueous and non-aqueous systems.
Familiarity with data reconciliation, parameter fitting, and model validation using experimental or operational data.
Competency with Python or MATLAB for model automation, data processing, and custom calculations is a strong plus.
Experience integrating process modeling outputs into EPC deliverables (PFDs, P&IDs, equipment datasheets, control narratives, etc.)
Extreme Ownership – We take full responsibility for outcomes, relentlessly driving toward solutions.
Engineer Out Requirements, then Automate – We simplify, optimize, and then automate for scale.
Share Your Legos – We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.
Join us as we build the future of responsible mineral sourcing and supply.
Building a better minerals company
Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.
Offices: San Francisco, CA 94107, US · La Sal, UT 84530, US · 1400 Minnesota St, San Francisco, California 94107, US
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