Senior Process Engineer — RNG & Biogas Systems Leader

Calbioenergy; Bakersfield, Northern (CA, KY); Hybrid; USD 135,000 - 155,000; Full time

Benefits offered by this job

Bonus potential 5%

Medical, dental, vision coverage

Life insurance

401k with match

Job summary

California Bioenergy LLC (CalBio) in Bakersfield, CA, seeks a Senior Process Engineer to lead complex RNG projects, mentor junior engineers, and ensure designs meet safety and regulatory requirements. This role supports full lifecycle activities from concept through commissioning in a heavy industrial setting.

Ideal candidates have 8–12 years of process engineering experience, a chemical or mechanical engineering background, and preferably a PE license.

Qualifications

• Bachelor or Master in Chemical or Mechanical Engineering; Master’s preferred.
• Professional Engineer (PE) license strongly preferred.
• 8–12 years of progressively responsible process engineering experience.
• Preferred experience in RNG, biogas, anaerobic digestion, or gas processing.
• Ability to develop/review BFDs, PFDs, P&IDs, and heat/mass balances.
• Advanced proficiency in engineering calculations, simulations, and process modeling tools (Pipe Phase, PRO II, Aspen HYSYS, Aspen Plus, or similar).
• Strong understanding of applicable codes, standards, and regulatory requirements.
• Strong written and verbal communication skills.

Responsibilities

• Lead the development, review, and approval of process design drawings, calculations, data sheets, specifications, and technical deliverables.
• Serve as a technical authority on RNG process engineering (anaerobic digestion, biogas upgrading, gas conditioning, compression and interconnect).
• Provide engineering direction and oversight to Process Engineers and other staff.
• Apply operating principles and regulatory requirements to project work.
• Define technical scope and resolve complex engineering challenges.
• Interface with internal teams, consultants, contractors, vendors, and regulators.
• Review multidisciplinary drawings and ensure alignment with scope and design intent.
• Support HAZOPs, design safety reviews, and constructability reviews.
• Assist commissioning, startup, troubleshooting, and optimization of facilities.

Skills

Process engineering

PE license

RNG/biogas

Regulatory knowledge

Engineering calculations

Education

Bachelor/Master in Chemical or Mechanical Engineering

Tools

Pipe Phase

PRO II

Aspen HYSYS

Aspen Plus

Job description

California Bioenergy LLC (CalBio) in Bakersfield, CA, seeks a Senior Process Engineer to lead complex RNG projects, mentor junior engineers, and ensure designs meet safety and regulatory requirements. This role supports full lifecycle activities from concept through commissioning in a heavy industrial setting.

Ideal candidates have 8–12 years of process engineering experience, a chemical or mechanical engineering background, and preferably a PE license.