Biogas PM Mechanic

Location: Visalia, CA
Posted: May 17,  2024


California Bioenergy LLC (CalBio) is one of the country’s leading developers of dairy digester projects. Our projects generate renewable natural gas and electricity which is used as a vehicle fuel to power clean trucks, buses, and cars. Founded in 2006, CalBio works closely with local dairy farmers, the California Air Resources Board (CARB), the California Department of Food and Agriculture (CDFA), the California Public Utility Commission (CPUC), the California Energy Commission (CEC), the Environmental Protection Agency (EPA), and the dairy industry to develop projects that reduce greenhouse gases (GHGs), protect local air and water quality, create local jobs, and provide a new revenue stream along with other meaningful benefits to its dairy partners. Along with its affiliates, Midwest Bioenergy, Northwest Bioenergy, and Southwest Bioenergy, CalBio is undertaking the development, construction, ownership, and operation of dozens of dairy digester projects across the country.


Reporting to the Director of Maintenance, the Biogas PM Mechanic performs skilled work that is necessary to maintain all anaerobic digester conditioning skids, and upgrader compressors in like new condition. The facility is composed of a digester, pumps, gas blowers, compressors, oxygen generators, condensers, chillers and related auxiliary equipment. Biogas PM Mechanic works with gas compression equipment to transfer, compress and recover different types of gases. Responsible for maintaining, troubleshooting, and assisting Biogas Compressor Technician with preventive maintenance, repairs and replacements as needed.


  • Perform routine, preventative maintenance, and repairs on rotary screw and reciprocating air compressors and all ancillary equipment relevant to the operation of those compressors. (i.e. Motors, trailered blowers, pumps, compressors, hp washers, chillers)
  • Ensure all compressor preventive maintenance requirements are captured in CMMS and can be scheduled on periodic schedule. Ensures all E-maintenance work orders are completed properly and on time.
  • Assist with compressor troubleshooting for both high and low pressure compressors.
  • Biogas PM Mechanic responsible for the performance of maintenance PMs and routine maintenance of all assigned equipment. (i.e. greasing motors, compressor, heat exchanger bearings). Maintain lube program overall.
  • Assist with Install and provide maintenance on industrial sized gas and air compressors, motors, bearings, seals, pumps, dryers, chillers and other mechanical components.
  • Generate repair work orders that address the deficiencies in the need of correction on field equipment and components.
  • Align with Maintenance Planner to ensure sufficient critical spares and required consumables are maintained in the warehouse to minimize downtime.


Performance will be assessed 90 days after initial hire, and then annually after that. Plant operations will be measured against plant operating efficiency, uptime (reliability), and cost expectations. The successful Biogas Plant Operator will be measured against adherence to company policy and ability to drive sustained efficiency through personal effort, communication, teamwork, and ability to leverage external resources.


  • Relevant maintenance and operating experience in an industrial or gas processing environment is desired.
  • Operational experience may be supplemented with military experience or training in a related field.
  • A relevant background in safety procedures/practices
  • Able to quickly respond to rapidly changing conditions.
  • Able to read, write and understand English is required. Spanish as a second language desired.
  • Able to read and understand mechanical and electrical drawings
  • Perform duties with little or no supervision and in a timely manner.
  • Proficient use of hand tools and power tools
  • Follow all health, safety and environmental procedures.
  • Willingness to travel.
  • Willingness to learn and have good communication skills.
  • Fundamental proficiency in Windows-based applications (Outlook, Word, and Excel) on a PC or tablet required.
  • Valid drivers license and ability to operate a motor vehicle in California is required


Work locations are industrial and agricultural, primarily outdoors in the Central Valley of California. Temperatures range from 40 deg F in the Winter to 115 deg F in the Summer. Limited exposure to hazardous materials and/or toxic fumes will require the use of approved personal protective equipment. Regular exposure to heat, noise, flammable materials, rotating equipment, and other conditions normally encountered in an industrial environment should be expected. California Bioenergy® will ensure all applicable work rules and safety requirements are closely adhered to.

This position will require heavy lifting (<50 lbs) and/or climbing ladder and/or stairs.