MAURICIO N. SAMPEDRO GUERRA
San Diego,CA
Summary
Maintenance Technician with 6+ years of experience maintaining and troubleshooting natural gas engines, diesel engines, hydraulic systems, rotating equipment, power transmission systems, and high-pressure pumping assets in demanding oilfield environments. Extensive experience with CAT 3512C, MTU 16V4000/20V4000, Allison, TH48, and TH55 platforms utilizing CAT ET, CAT SIS, and Cummins INSITE diagnostics. Proven expertise in preventive maintenance, equipment rebuilds, root-cause failure analysis, major component replacement, and equipment reliability improvement. Experienced leading teams of 4–8 technicians while maintaining strict compliance with HSE, H2S, LOTO, JSA, and operational safety requirements.
Overview
8
8
years of professional experience
1
1
Certification
1
1
Language
Work History
Maintenance Technician / Lead Technician
LIBERTY ENERGY
Midland, Tx
08.2024 - Current
- STARTED WITH LIBERTY MAY 2021-MAY 2022. RETURNED IN AUGUST 2024 - CURRENT.
- Supervise and mentor teams of 4–8 technicians supporting critical hydraulic fracturing equipment.
- Diagnose and repair CAT 3512C engines, MTU 16V4000/20V4000 engines, TH48 and TH55 transmissions, hydraulic systems, and ancillary equipment.
- Utilize CAT ET, CAT SIS, and Cummins INSITE to troubleshoot mechanical, electrical, and performance-related faults.
- Perform CAT overhead valve adjustments, major component replacements, and advanced diagnostics.
- Troubleshoot hydraulic fan systems using pressure testing, flow analysis, and component inspections.
- Conduct root-cause failure analysis to improve equipment reliability and fleet uptime.
- Lead daily safety meetings and maintain compliance with HSE, H2S, JSA, LOTO, and lift-plan requirements.
Field Service Technician
GD ENERGY PRODUCTS
Odessa, Tx
01.2022 - 01.2023
- Rebuilt, inspected, and tested triplex and quintuplex power ends and fluid ends.
- Performed field inspections, failure analysis, and repair recommendations for critical pumping equipment.
- Conducted detailed inspections of bearings, crankshafts, lubrication systems, and structural components.
- Operated overhead cranes, telescopic forklifts, and hydraulic torque equipment.
Outside Machinist I
PROPULSION CONTROL ENGINEERING
01.2020 - 01.2021
- Maintained and repaired propulsion, hydraulic, refrigeration, fluid handling, pumps, valves, and auxiliary systems aboard U.S. Navy vessels.
- Installed, repaired, and tested compressors, heat exchangers, and mechanical equipment in industrial environments.
Maintenance Technician
SCHLUMBERGER
Midland, Tx
01.2019 - 01.2020
- Performed preventive maintenance and repairs on hydraulic fracturing pumps, diesel engines, driveline systems, and support equipment.
- Conducted fluid end rebuilds, power end repairs, inspections, and CAT engine overhead adjustments.
- Supported fleet reliability through inspections, diagnostics, and corrective maintenance.
Education
Associate of Occupational Studies (AOS) - Industrial Diesel Technology
Universal Technical Institute
08.2019
Cummins Technician Program
Universal Technical Institute
08.2019
Skills
- Natural Gas Engines (CAT, MTU, Cummins) Condition Monitoring & Performance Assessment
- CAT ET
- CAT SIS
- Cummins INSITE Reliability Improvement & Root Cause Analysis
- CAT 3512C
- MTU 16V4000/20V4000 Equipment Inspection & Preventive Maintenance
- TH48
- TH55
- Allison Transmissions Work Orders & Maintenance Documentation
- Hydraulic Systems Diagnostics Blueprint & Schematic Interpretation
- Mechanical & Electrical Troubleshooting LOTO
- JSA
- HSE Compliance
- Rotating Equipment
- Pumps
- Bearings Hazard Recognition & Risk Assessment
- Power Ends
- Fluid Ends
- High Pressure Iron Leadership & Team Development
Certification
- Caterpillar Technical Training
- CAT ET / CAT SIS
- Cummins INSITE
- PEC / SafeLand USA
- H2S Certified
- Overhead Crane Certified
- Forklift Certified
- Extensive LOTO, JSA, and HSE Compliance Experience
Languages
Spanish
Native or Bilingual
Timeline
Maintenance Technician / Lead Technician
LIBERTY ENERGY
08.2024 - Current
Field Service Technician
GD ENERGY PRODUCTS
01.2022 - 01.2023
Outside Machinist I
PROPULSION CONTROL ENGINEERING
01.2020 - 01.2021
Maintenance Technician
SCHLUMBERGER
01.2019 - 01.2020
Associate of Occupational Studies (AOS) - Industrial Diesel Technology
Universal Technical Institute
Cummins Technician Program
Universal Technical Institute