Jason Choi
Queen Creek,AZ
Summary
Professional technician with extensive hands-on experience in troubleshooting, maintenance, and repair of complex systems. Strong focus on team collaboration and achieving results. Reliable with adaptable skill set in diagnostics, electrical systems, and mechanical repairs. Known for effective problem-solving and delivering high-quality outcomes.
Overview
6
6
years of professional experience
1
1
Certification
Work History
Air Separation Unit Operation Technician
AirProducts and Chemicals
07.2025 - Current
- Operated and monitored chemical processing equipment to ensure optimal performance and safety compliance.
- Conducted routine inspections and maintenance on production machinery to minimize downtime.
- Maintained accurate documentation of all machine activities, ensuring traceability of performance data for future analysis.
- Managed inventory levels effectively, avoiding shortages while minimizing excess stock that could lead to obsolescence or increased storage costs.
- Respond to alarms, leaks, or equipment malfunctions
- Water chemistry
- Handled extremely cold (cryogenic) liquids and high-pressure gases safely
- Followed lockout/tagout, confined space, and emergency protocols
- Made sure oxygen, nitrogen, or argon meets required purity
- Controlled compressors, heat exchangers, and distillation columns
- Start up, shut down, and adjust the unit using control panels (DCS)
- Collaborated with team members to troubleshoot issues, ensuring minimal downtime and maintaining productivity.
- Monitored and operated 8 active plants
Lead Operator Liquid Hydrogen
AirProducts and Chemicals
12.2024 - 07.2025
- Oversaw daily operations to ensure compliance with safety and quality standards.
- Trained and mentored junior operators on equipment usage and safety protocols.
- Implemented process improvements that enhanced operational efficiency and reduced downtime.
- Monitored production metrics to identify trends and recommend corrective actions.
- Led team meetings to discuss performance, address challenges, and strategize solutions.
- Coordinated maintenance schedules to minimize disruptions in production workflow.
- Fostered a positive work environment, promoting open communication among team members to address concerns or suggestions for improvement.
- Improved production efficiency by implementing streamlined processes and optimizing equipment usage.
- Worked outside in all weather conditions.
- Made sure that products were produced on time and are of good quality.
- Tested products or subassemblies for functionality or quality and troubleshot problems with equipment, devices, or products.
- Enhanced team performance through regular training sessions and coaching on best practices.
- Assigned tasks to team members based upon individual strengths and experience, realizing productivity and workflow improvements.
Hydrogen Gas Operation Technician
AirProducts and Chemicals
07.2020 - 11.2024
- Provided training and guidance to new team members on operational procedures.
- Collaborated with engineering team to develop innovative solutions for improved efficiency.
- Prepared reports detailing operational performance metrics and trends.
- Evaluated existing processes and procedures for potential areas of improvement.
- Displayed strong telephone etiquette, effectively handling difficult calls.
- Issue permits such as hotwork and group lockouts
- Highly experienced in hydrogen gas based plants such as MDEA, caustic, steam, C02, BFW, demineralized water, cooling water, feed gas, natural gas, PSA, SMR, steam driven pumps, electrical pumps, and many more.
- Completed over 7 major turnarounds in Torrance and other places such as Martinez PBF.
- Execute and manage plant startups, shutdowns , and outages.
- Direct field operators, maintenance, I&E, and plant personnel in their daily expectations and duties
- Operate DCS software system. Respond to critical alarms, emission events, and equipment failures.
- Level 1 senior operator in shift with level 2s and 3s under my supervision and guidance for 4+ years.
- Responsible for the safe protocols and processing to produce hydrogen product in Unit 4 - 40 MMSCFD and Unit 24- 88 MMSCFD.
- Confine Space Supervisor in training.
- Respiratory Program Coordinator - current
- Executed major evolutions involving with Torrance PBF Refinery with constant communications and establishing a healthy relationship.
- Resolved network alarms, recognizing jeopardizing conditions, and notifying professionals of risk potential.
- Maintained accurate records of daily activities, machine status, material usage.
- Diagnosed mechanical problems and made necessary repairs to maintain continuous operations.
Education
High School Diploma -
Torrance North High School
Torrance, CA06-2010
US Navy Machinist Mate Submarine 2015-2020
Skills
- Operations Monitoring
- Lockout and tagout procedures
- Hazardous Materials Handling
- Operational Efficiency
- DCS and field operator
- Data Collection
- Preventive Maintenance
- Report Preparation
- Critical thinker
- Troubleshooter
- Problem solver
- In-depth technical knowledge
- Procedural knowledge
- Adaptive learning
- Attentive learning
- Time management
- Managed competing priorities
- Interpersonal skills
- OSHA Compliance
- Attention to Detail
- Works Well Under Pressure
- Multitasking and organization
- Work Planning and Prioritization
- OSHA Compliance
- Attention to Detail
- Works Well Under Pressure
- Multitasking and organization
- Quality control
- Work Planning and Prioritization
- Team Training
- Blueprint reading
- Project Support
- Loading and unloading
Accomplishments
- Navy Accomplishments
- Performed maintenance on oxygen generators, ship's diesel, refrigeration[hvac], potable water/plumbing, high/low pressure air compressors, gage calibrations, ventilation/atmospheric control and control equipment with strict procedural compliance using technical manuals.
- Maintained machinery spaces on a regular basis, able to respond to casualties and stressful situations, working with others in combat-ready situations to restore to normal operations.
- As a quality assurance inspector/planner, I have conducted/worked over 30 Subsafe/Level 1 packages in accordance with the Navy's JfMM for ship's readiness.
- No rework has been conducted.
- Performed troubleshooting and repairs on various Working out, Outdoor activities and Socializing References available upon request machinery. Troubleshot malfunctions and diagnosed issues to service equipment quickly and fully. • Took measurements and evaluated dimensions of surrounding area to correctly install new machinery.
- Communicated effectively with clients regarding project timelines.
- Developed preventative maintenance schedules for clients.
Affiliations
I'm a skilled field operator and control room operator. Proficient with timely and effective decisions, including good judgement and consideration of proper balance between benefit/risks. I'm hard working, punctual and skilled in my professions, love to work over-time, and I'm willing to work long flexible hours and holidays if needed. Spending time with my family and advancement within my career are my top priorities.
Certification
- Navy Certifications
- O2 Generator 6l16 Operator (A-652-0050/044y)
- Submarine Quality Assurance Inspector (CIN: a-557-0082 CDP: 044G)
- Basic Mechanical Skills (A-652-0030)
- High pressure/low pressure air compressor and dehydrator advanced operator (A-652-0341)
- High pressure/low pressure air compressor and dehydrator advanced maintenance (A-652-0343)
- Quality Insurance Inspector QAI
Languages
English
Native or Bilingual
Korean
Limited Working
Timeline
Air Separation Unit Operation Technician
AirProducts and Chemicals
07.2025 - Current
Lead Operator Liquid Hydrogen
AirProducts and Chemicals
12.2024 - 07.2025
Hydrogen Gas Operation Technician
AirProducts and Chemicals
07.2020 - 11.2024
High School Diploma -
Torrance North High School
US Navy Machinist Mate Submarine 2015-2020
Hobbies
Enjoy spending time with friends through camping, hiking, and playing sports. Like being outdoors, staying active, and working as a team while exploring new places and building strong friendships.