Comminution Lab Operator

Number of employees


Oakland, CA, United States

Posted on: 2023-11-16

Category: materials

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Employment type:

Full time

Experience required:



Salary not provided

About the company:

Cement is responsible for about the same amount of greenhouse gas emissions as all of the cars on the road today worldwide. Cement has been widely considered one of the most difficult materials to decarbonize and has even been called out as the reason why we need point-source CCS. We have invented a way to make carbon-negative Portland cement that does not rely on point-source CCS and is identical to conventional cement and, most importantly for impact, is lower in cost. Simply put, our process will turn one of the most intractable climate problems into a carbon-negative climate solution.

This position is located onsite at our lab in Oakland, CA.
The hourly range for this position is $30-$38.

Position Overview

  • Wash, Crush, Mix, Split and mill 20kg batches of feed rock.
  • Operate a Jaw crusher, shatterbox, drum mill, planetary ball mill after training.
  • Ability to wet and dry sieve material
  • Milling of process materials
  • Follow detailed established procedures using lab equipment to produce samples for optical microscopy and scanning electron microscope analysis.
  • Thick and thin sections preparation for imaging characterization techniques
  • Rock beneficiation
  • Able to operate a magnetic separator after training
  • Able to keep track of samples before and after the magnetic separation, including labeling and weighing samples
  • Position Qualifications

  • Completion of high school or equivalent.
  • Ability to operate mechanical (e.g., crushing, pressing) equipment after receiving job-specific training.
  • Ability to wear a respirator for an extended period of time.
  • Comfortable with basic mathematical calculations
  • Ability to comfortably lift and move up to 50 pounds of materials without assistance with frequency.
  • Strong commitment to work safety.
  • Strong affinity for teamwork and interpersonal skills.

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