Mario Contreras

29635 Legends Line Drive

Spring, Texas 77386

(619) 218-1130





Relative Experience:  Quality Assurance, Quality Control, Heavy Equipment Cranes, Documentation/Data entry, Technical manuals, Hydraulic Schematics, Six Sigma green/Black belt, Shop Safety, Troubleshooting, Aircraft Hydraulics, Offshore Sub Sea Engineering          


Work History

Sub Sea Engineer                        C-Mar America                      Houston TX           June 2014 – Present.

     ·   Perform In-process and Final inspections using precision equipment such as Micrometers, Caliper, Depth gauges.

     ·   Review all Operator inspection documentation for accuracy and compliance with material requirements and Quality Operation Plans.

     ·   Read and interpreted customer purchase orders, and engineering drawings to ensure scheduled maintenance is properly performed.

     ·   Verify torque, operating pressures and proper function of BOP and sub-components.

     ·   Function test, troubleshoot, and perform maintenance on all Surface Safety Equipment.

     ·   Prepared and submitted inspection reports on all Non Conformance Material.

     ·   Participate in root cause analysis investigations to identify problems with Non Conformance Materials, such as equipment set-up, material defect or           operator error.

Assistant Sub Sea Engineer      Noble Drilling             Sugarland   TX 76179    Nov. 2011 – May 2014.

     ·   Part of the Sub Sea departments Commission Team for the” Noble Globe Trotter 1” and “Noble Don Taylor” Drill ships.

     ·   Responsible for repair, deficiencies and testing of Shaffer 5th Gen.NXT BOP and all Subsea department equipment.

     ·   Maintain Huiseman Mounted Riser Tensioners, Nitrogen generators, High Pressure Air compressors, and Hydraulic Pressure Unit. 

     ·   Manufacture various sized hose, and tubing for multiple applications (High Pressure, Medium and Low).

     ·   Routine maintenance of VETCO Wellhead connector, and Cameron Colet Connectors.

     ·   Perform Maintenance on Shaffer 22” NXT “Pos Lock” and 14” NXT “Ultra Lock II”.

     ·   Maintain Hands Free Gooseneck and Telescopic Joint system.

     ·   Rebuild, repair, service, and test Shaffer Spherical Blow out Preventers.

     ·   Work alongside crane crews to remove and install multiple Heavy equipment to perform maintenance, repairs and heavy lifts, safely.


            Assistant Sub Sea Engineer       Diamond Offshore             Houston TX        Mar. 2011 – Nov. 2011  

        ·   Performed testing, scheduled maintenance, and repairs on BOP and Sub components to ensure safe operations.

     ·   Verified manufactures specified measurements for Hydrill, Shaffer, and Cameron Single, Double and Triple cavity Bodied BOP’s

     ·   Remove and Replace Ram Blocks, Perform Corrosion Control, and perform function tests to verify proper operation.

     ·   Set Pre-charge for Subsea and Surface Hydraulic Accumulators, to accommodate desired depth for drilling operations.

     ·   Pressure Test BOP to 15k psi, on surface and on Well head to prove the validity of work performed on BOP and related systems.

     ·   Travel to and from Diamond Offshore Drilling assets to assist with End of Well Maintenance and repair of Sub Sea, and Surface safety equipment.


            Sub Sea Engineer Trainee                  Saipem ENI                     Milan Italy                Feb. 2010 – Jan.2011

     ·   Perform Hydraulic testing on all equipment that pertain to the Sub Sea department for acceptance.

     ·   Team member of Subsea systems on new build drill ship (Saipem 12000).

     ·   Ensure that BOP, Hydraulic Pressure Unit, Mounted Riser Tensioner’s, Tension Ring, Crown Mounted Compensator, Nitrogen generator, Air     Compressors, and pumps are in proper working condition to support drilling activities.

     ·   Established a Work Center/Tool Room to allow repair and maintenance to easily be performed on Sub Sea Equipment.

     ·   Maintained accurate logs relevant to the subsea equipment and to report any issues relating to equipment which may affect operations.

     ·   Assisted with setting up High and Low quantities for spares and recommended spares for automatic reorder.

     ·   Worked with Project Managers for installation and commissioning of Subsea and Surface equipment.

     ·   Prepped all BOP and running equipment, for initial installation on Wellhead.

     ·   Utilize Boom Cranes to remove and install equipment for inspection and repair.



              Assembly Technician                     Halliburton                     Houston TX        Oct. 2008 - Feb. 2010 01                                                                                                                                                                                                   

          ·   Perform quality control inspection on all items prior to acceptance for assembly.

          ·   Assemble and perform initial testing to specifications, drawings, and documented procedures for Sonar collar.

          ·   Install proper software and incorporated latest revisions to programming.

          ·   Testing and Troubleshooting of Bat sonic sonar collar assemblies.

       ·   Utilize over head crane to transport and re position collars.

       ·   Analyze multiple work centers to re configure, resulting in a reduction of backlog items, and an increase of overall productivity.

       ·   Lead and participate in LEAN Six Sigma events throughout the whole production plant.

       ·   Track and verify ordered and received materials necessary for New Build collars and collar repair.

             Blow Out Preventer Technician      National Oilwell VARCO    Houston TX     Oct. 2007 - Oct. 2008.

        ·   Assembly team member for subsea Blow out Preventers, Hydraulic valves, tubing and hoses assembly (High and Low pressure).

        ·   Utilize Boom cranes, Overhead cranes, and Gantry cranes to successfully lift and move heavy equipment.

        ·   Rig properly rated safety slings and various lifting equipment to safely lift and transport “Heavy” and “Critical” Lifts.

        ·   Function Test and Pressure Test all BOP and Sub components to prove operational design and specifications.

        ·   Validate purchase orders against delivered and ordered items for customer specific orders.

        ·   Assembled, Tested and delivered 9 Blow out Preventers, as per Customer specifications.  

        ·   Scheduled and organized timely delivery of hydraulic components of blowout preventers.

        ·   Complete assembly, testing, teardown, and shipping of BOP/MUX (5th Gen) BOP Stacks and Failsafe valves.

        ·   Inspect components and sub Components of  Shaffer subsea Blow Out Preventers to include:

             ·  18-10m Wedge type spherical BOP.

             ·  SL and NXT 18-15m triple cavity ram BOP.

             ·  HB hydraulic-operated gate valves.

             ·  SL multi-rams, pipe rams, and CVX shear rams.

             ·  Shaffer 5th generation MUX control pods


Hydraulics Supervisor / Repair Technician             U.S. Marine Corps San Diego,            Aug. 1995 - Jul. 2007

        ·   Read and interpreted maintenance manuals, service bulletins, diagrams, schematics and other specifications to determine the feasibility, method and             cost of repairing or replacing malfunctioning or damaged components.

        ·   Manufactured and Tested Hydraulic hoses (High Pressure and Low pressure).

        ·   Manufactured and Tested Hydraulic Rigid Tubing lines, in accordance with Naval Aviation requirements.

        ·   Inspected flight control components and hydraulic systems to locate cracks, breaks, leaks, or other defects.

        ·   Performed intermediate level troubleshooting and repairs of hydraulic/pneumatic actuators, Hydraulic valves, Landing   Gear and electrical flight             control components for FA-18, C-130, CH-46 and CH-53 United States Marine Corps Aircraft.

        ·   Performed Electrical integrity tests on electrical/hydraulic valves, flight controls, test benches, and various components.

        ·   As a Collateral Duty Inspector was responsible for performing and documenting In-process Inspections and tests to ensure critical steps in the                          component repair were performed.

        ·   Conferred with Production control, Supply department personnel, supply vendors, and customers to expedite processing and shipping of required             materials for all components in the work center.

        ·   Managed a work center of 25 personnel in troubleshooting, repair and overhaul of aircraft.

        ·   Conducted audits inspections throughout the Aviation maintenance department and generated reports of non-conformances in accordance with                        prescribed procedures and processes. Followed up to ensure satisfactory conformance to component design or safety requirements.

        ·   Identified deficiencies in procedures and assisted in rewriting command procedures to simplify the process.

        ·   Conducted training as required to maintainers and Department Collateral Duty Inspectors (CDIs).

        ·   Responsible for the efficient repair of all critical Aircraft components inducted to the repair facility.

        ·   Conferred with unit leaders, supply department, contractors and shop supervisors to expedite or update status on materials required for repair.

        ·   Set priorities of maintenance to minimize down time with down aircraft.

        ·   Maintained and updated data files, such as maintenance records, and cost analysis reports.

        ·   Contributed in attaining a 92.4% “Ready For Issue” rate with more than 20,000 components repaired during the period.



Villanova University (LEAN 6 Sigma Black Belt)

Graduated From Central High School in 1995

Relevant Education:

Marine Corps Advanced Professional Leadership Course.         HCT-10 Hydraulics Test Bench     

          T-10 hydraulics Test Bench     Intermediate Level Hydraulics Course     F/A-18 STS Servo Cylinder Test Stand        Advanced Hydraulic           Component Repair Course      Six Sigma Black Belt and Champion courses         Hydraulic Contamination Control Managers Course

Computer Skills                                                                                      Language Skills 

          Email Software (Outlook)                                                                        English - Excellent (Read Write Speak)

          Personal Computers                                                                                

          Presentation Software (PowerPoint, Flash, etc.)

          Spreadsheet Software (Excel, etc.)   

   Word Processing Software (Word, WordPerfect, etc.)









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