John Maffei
Cheyenne,Wyoming
Summary
Experienced with leading technical teams to ensure optimal system functionality. Utilizes problem-solving skills to address technical challenges and improve operational efficiency. Track record of effective team management and technical proficiency in troubleshooting and repair.
Overview
12
12
years of professional experience
1
1
Certification
Work History
Lead Technician
Wyoming Machinery
Cheyenne, WY
04.2024 - Current
- Supervised daily operations, ensuring adherence to safety protocols and operational standards.
- Mentored junior technicians, fostering skill development and enhancing team productivity.
- Implemented process improvements that increased efficiency in equipment maintenance workflows.
- Collaborated with cross-functional teams to troubleshoot complex technical issues effectively.
Field Technician level 3
Baseline Energy services
12.2021 - 04.2024
- Job Duties: Responsible for a fleet of equipment that was assigned to me usually between 19 and 25 natural gas generator packages Engine models are the Doosan 8L,11L,14L,and 22L I am responsible for the preventive maintenance as well as large repairs ranging from head replacement to resealing of main seals and oil cooler. Troubleshooting engine problems including electrical problems engine hard part issues I am also responsible for doing all the preventive testing including cylinder leak down tests bore scoping compression testing and valve recession testing. I take oil samples and put together parts lists of any issues that arise with the units. I also have a limited ability to troubleshoot the generator AVR systems and the diode. The models I have worked with are the Marathon and Stamfords. I also completed emission testing for the company. My responsibilities include making adjustments to the engine and replacing catalysts to ensure they pass the state emission standards. I have also traveled to other states Texas and Oklahoma to do emission testing.
Field Technician level 3
Archrock
11.2019 - 09.2020
- Job Duties: Responsible for preventive maintenance on Engine compressor packages included were engine overheads spark plugs replacement compression test filter replacements oil sample and setting fuel densities.Engines I performed maintenance on where the CAT 3300,3400,and 3500 series engines all of the 3500 engines were ULB series engines.The other engines i worked on were the waukesha 7044 engines.The compressors I worked on were Ariel J,K,and C frames as well as Gemini compressors I was responsible for replacing packings on the reciprocal compressors as well as checking valve temps replacing valves as needed checking PSV for date at proper pressure settings.I also have experience in troubleshooting Altronic operating systems on the chanel base program.
Field Technician
Basin Power Solutions
12.2017 - 11.2019
- Job Duties: Responsible for doing preventive maintenance that included setting maintenance intervals, ordering and organizing all parts that were or could be needed for preventive maintenance.Testing on a small fleet of natural gas generators we had in the field. I also took on a partial shop role doing inframe overhauls that included replacing heads cylinder liners and piston packs rod and main bearings measuring and checking clearances on all major components in the overhaul procedures engine models including Doosan 8L,11L,14L,18L,and 22L. I also had a limited amount of exposure to the gen end in trouble shooting the AVR.
Field Technician
Pegasus
09.2016 - 12.2017
- Job Duties: I was team member that was responsible for taking a part in doing inframe overhauls my responsibilities ranged from removal and replacement of head piston liner packs replacing and resealing front ends and engine front gear trains replacing water pumps oil pumps running over heads checking bearing clearances on the rods and main bearing systems doing crank thrust testing making sure bolts and fasteners are properly torqued to manufacturer specifications . I also have done inframe overhauls on Ariel reciprocating compressors including doing rod run out testing rolling and inspecting crossheads removing and replacing packings replacing valves checking high pressure lubrication systems and confirm all are in proper working order. Checking the main rod bearing clearance against manufacturer specifications as well as checking compressor balance to ensure maximum efficiency. On all overhauls we performed alignments between the compressor and engines.When a engine or compressor was due for swing it was also the the responsibility of the crew i was on to prep the engine for swing and ensure all third party hands were being safe and had the proper direction to remove and replace whole pieces of equipment. The engines I have experience on are Cat 3500 and 3600 series engines Waukesha 7044,7042,1157, and 3524 engines all CEC or ESM models. Compressors I worked on were Ariel Reciprocating K,C, and Z frames as well as FRICK screw style compressors.
Field Technician
WoodGroup PSN
10.2015 - 09.2016
- Job Duties: I was team member that was responsible for taking a part in doing inframe overhauls my responsibilities ranged from removal and replacement of head piston liner packs replacing and resealing front ends and engine front gear trains replacing water pumps oil pumps running over heads checking bearing clearances on the rods and main bearing systems doing crank thrust testing making sure bolts and fasteners are properly torqued to manufacturer specifications . I also have done inframe overhauls on Ariel reciprocating compressors including doing rod run out testing rolling and inspecting crossheads removing and replacing packings replacing valves checking high pressure flow systems and confirm all are in proper working order. Checking the main rod bearing clearance against manufacturer specifications as well as checking compressor balance to ensure maximum efficiency. On all overhauls we performed alignments between the compressor and engines.When a engine or compressor was due for swing it was also the the responsibility of the crew I was on to prep the engine for swing and ensure all third party hands were being safe and had the proper direction to remove and replace whole pieces of equipment.The engines I have experience on are cat 3500 and 3600 series engines Waukesha 7044,7042,1157, and 3524 engines all CEC or ESM models. Compressors I worked on were Ariel Reciprocating K,C, and Z frames as well as FRICK screw style compressors.
Shop/Field Technician level 1
GasDrive Global/Enerflex
10.2013 - 02.2015
- Job Duties: I was responsible for disassembling engines for zero hour overhaul that entailed taking the engine down to bare block soaking and cleaning in a caustic solution to ensure all contaminants were out of the engine. I also disassembled head and water pump assemblies and cleaned and rebuilt them to factory specifications.I learned how to use precision measurement tooling to check all major clearances and take notes of all measurements for the customer build sheet including bump checks on bearings and crankshaft thrust. I also started going into the field and helping with jobs such as thermostat replacement infame overhauls in various other states. The engines I got experience on were Waukesha 7044,7042,1157,3524, and F18 ESM 1.
Education
Associate degree - Diesel technology
Gillette community college
01.2014
High school - undefined
Campbell county High school
01.2013
Skills
- System diagnostics and repair
- Expertise in diagnostic evaluation
- Workplace safety adherence
- System performance optimization
Certification
OSHA 10
Genie Man Lift
Caterpillar fork lift
Safe Land
Safe Sea
Timeline
Lead Technician
Wyoming Machinery
04.2024 - Current
Field Technician level 3
Baseline Energy services
12.2021 - 04.2024
Field Technician level 3
Archrock
11.2019 - 09.2020
Field Technician
Basin Power Solutions
12.2017 - 11.2019
Field Technician
Pegasus
09.2016 - 12.2017
Field Technician
WoodGroup PSN
10.2015 - 09.2016
Shop/Field Technician level 1
GasDrive Global/Enerflex
10.2013 - 02.2015
High school - undefined
Campbell county High school
Associate degree - Diesel technology
Gillette community college