Mark Granillo
Katy,TX
Summary
Experienced Diesel Technician with background testing, diagnosing, and correcting mechanical issues with speed and accuracy. Good communicator with organized approach and solid understanding of priorities.
Overview
8
8
years of professional experience
Work History
Diesel Technician
Harris county ESD 48
Katy, Texas
08.2023 - Current
- Diagnosed engine faults using scan tools and shop manuals to ensure timely repairs and maintain vehicle reliability.
- Repaired fuel, cooling, and air systems on emergency response vehicles
- Inspected diesel engines, brakes, and electrical systems for Harris County ESD 48 fleet
- Performed preventive maintenance on fire apparatus and support trucks
- Read job orders and observed and listened to vehicles in operation to determine malfunctions and plan work procedures.
- Conducted regular inspections of vehicles to identify any potential safety risks before they become major problems.
- Diagnosed and performed accurate repair on brakes, engines, suspensions, drive trains and transmission clutches.
- Repaired hydraulic hoses and lines according to manufacturers' specifications.
- Conducted successful road service for remote breakdowns and verified safe and operational return of company's equipment.
- Assisted shop personnel to foster a collaborative technical environment focused on customer service and effective problem-solving.
- Repaired and serviced air conditioning, heating and electrical systems.
- Completed simple and advanced repairs according to specifications for brakes, exhaust and electrical systems.
- Inspected valves for wear, leaks, and proper operation in plant systems.
- Disassembled, cleaned, and reassembled valve components using hand and power tools.
- Tested valve pressure, seal integrity, and flow control during maintenance checks.
- Documented repair work, inspection findings, and parts used in maintenance logs.
- Maintained workshop tools, parts inventory, and clean work areas for daily service.
- Responded promptly to emergency repair calls, minimizing downtime and ensuring operational readiness of emergency response vehicles.
- Installed replacement tires following employer safety procedures.
- Removed old tires from rims using specialized tools such as bead breakers and tire irons.
- Inspected hydraulic systems for leaks, wear, and pressure issues.
- Repaired hoses, cylinders, valves, and pumps on equipment.
- Performed routine maintenance on hydraulic systems, including changing oil filters, flushing tanks and replacing hoses.
Diesel Technician
Rush Truck Leasing
Houston, Texas
10.2021 - 08.2023
- Inspected diesel engines, brakes, electrical systems, ensuring safety and reliability for Rush Truck Leasing
- Diagnosed engine faults using scan tools and shop manuals
- Repaired fuel, cooling, air systems on emergency response vehicles, enhancing operational readiness
- Managed customer fleet of 20 heavy duty vehicles, coordinating maintenance schedules to minimize downtime
- Oversaw work orders for vehicle maintenance, ensuring timely processing and completion. , parts management, communication to customer .
- Trailer inspection and preventative maintenance with repair
- Documented repair work and maintenance records
- Removed malfunctioning parts and repaired components or installed new ones.
- Read job orders and observed and listened to vehicles in operation to determine malfunctions and plan work procedures.
- Diagnosed and performed accurate repair on brakes, engines, suspensions, drive trains and transmission clutches.
- Used manual and computer- assessed diagnostic devices to test equipment and determine repair needs.
Infantryman
Army
Houston, Tx
06.2018 - 09.2021
- Trained Army teammates on weapons handling and combat drills.
- Operated and maintained Army small arms and crew-served weapons.
- Maintained accountability of assigned personnel, weapons, equipment and supplies.
- Assisted with the maintenance of weapons, equipment and vehicles.
- Ensured compliance with safety regulations and standard operating procedures.
- Repaired rifles, pistols, and related weapon systems using approved hand tools.
- Documented repair work and parts usage in employer maintenance records.
- Read and interpreted technical manuals, drawings and schematics to make accurate repair decisions.
- Maintained records of repairs and inspections, including serial numbers, test results, and parts used in the repair process.
- Tested repaired items for proper functioning and accuracy.
- Operated various types of military vehicles including tanks, Humvees and armored personnel carriers.
- Performed regular maintenance on military vehicles to ensure operational readiness. and operation for tactical mobility.
Education
Aviation Technican - Aviation Technican
Pierce College
Puyallup, WA 03.2021 - 08.2021
Morton Ranch High School
Katy, TXPreventive Maintenance
Pierce Manufacturer
Skills
- Engine diagnostics
- Troubleshooting and diagnosis
- Brake repair
- Electrical troubleshooting
- Hydraulic systems
- HVAC systems maintenance
- Electrical systems
- Exhaust system repair
- Maintenance and repair
- Vehicle inspection
- Fleet maintenance
- Work order management
- Parts inventory
- Technical documentation
- Parts documentation
- Road service
- Troubleshooting skills
- Maintenance servicing
- Pneumatic systems
Timeline
Diesel Technician
Harris county ESD 48
08.2023 - Current
Diesel Technician
Rush Truck Leasing
10.2021 - 08.2023
Aviation Technican - Aviation Technican
Pierce College
03.2021 - 08.2021
Infantryman
Army
06.2018 - 09.2021
Morton Ranch High School
Preventive Maintenance
Pierce Manufacturer