Mario Castro
Big Lake,TX
Summary
Dependable Oil & Gas professional with hands-on experience in drilling and flowback operations, focusing on pressure control and well monitoring. Skilled in monitoring gauges, tank levels, and flow rates while maintaining detailed records and providing timely reports. Recognizes abnormal readings and equipment issues, communicates critical information, and performs effectively under demanding conditions. Committed to safety and minimizing downtime to support reliable production.
Overview
2
2
Languages
1
1
Certification
21
21
years of professional experience
Work History
Well Testing Operator
GHS Energy Services
Big Lake, Tx
05.2026 - Current
- Monitored pressure and flow rates during well tests for accurate data collection.
- Recorded test results and prepared reports for review by senior operators.
- Assisted in troubleshooting equipment issues to maintain workflow efficiency.
- Communicated effectively with team members regarding testing progress and findings.
- Prepared reports summarizing field operations and test results.
- Inspected equipment for proper functioning prior to use in order to prevent accidents or injuries.
- Operated a variety of pumps, valves, gauges, meters, separators and other related equipment used in well testing operations.
Flowback Operator
CP Well Testing
Orla, Texas
08.2024 - 04.2026
- Drill Outs
- Toe Preps
- Frac Watch
Flowback Operator
Oil Patch
Orla, Texas
03.2021 - 08.2024
- Off line cement
- Drill outs
- Well Testing
Flowback Operator
Premier Flow Control
Big Springs, Tx
11.2017 - 03.2021
- Drill outs
- Coordinated with team members to optimize operational workflows and efficiency.
Flowback Operator
Select Energy Services
Big Lake, Texas
01.2017 - 11.2017
- Well testing
- Operated flowback equipment to facilitate efficient well testing processes.
- Monitored pressure readings to ensure safe operations during flowback activities.
- Collaborated with team members to coordinate flow testing schedules and logistics.
- Assisted in data collection and reporting for well performance analysis.
- Adhered to safety protocols to ensure a secure working environment at all times.
- Performed pressure checks, monitored flowback operations, and operated valves to maintain a safe working environment.
- Drill outs
- Off line cement
Reverse hand/Field Tool Hand
Eaton Oil Tools
Carthage, Texas
01.2014 - 12.2016
- Ran Pipehandler
- Operated Power Swivel
- Operated machinery for drilling and extraction processes efficiently.
- Assisted in maintaining equipment to ensure optimal performance.
- Collaborated with team members to enhance workflow and safety procedures.
Floor hand/Derrickhand/ Extra Operator
Red Diamond
Waskom, Texas
10.2012 - 11.2013
- Operated drilling equipment to ensure efficient extraction processes.
- Assisted in rig maintenance to uphold operational readiness and safety standards.
- Coordinated with team members for effective workflow during drilling operations.
- Conducted regular inspections of tools and machinery for optimal performance.
- Assisted with pipe tallying, rigging up and pipe handling processes.
- Inspected fall arrest systems, harnesses, derricks and hoisting components for safety.
- Monitored gauges on the rig floor to determine pressure levels within the wellbore.
- Coordinated equipment maintenance and inspections to minimize downtime and enhance performance.
- Trained new floorhands on safety protocols and efficient workflow practices.
- Conducted regular safety meetings to promote a culture of awareness and risk management.
- Managed inventory supplies to ensure availability for daily operations and reduce waste.
Floor hand/Derrickhand/ Extra Operator
Royalty Well Service Oil & Gas
Marshall, Texas
07.2012 - 10.2012
- Followed safety protocols and procedures diligently during operations.
- Conducted regular maintenance checks on tools and equipment used in services.
- Operated drilling equipment to ensure efficient extraction processes.
- Managed equipment logistics to support continuous drilling activities on-site.
- Assisted with pipe tallying, rigging up and pipe handling processes.
- Monitored gauges on the rig floor to determine pressure levels within the wellbore.
Floor hand/Derrickhand/ Extra Operator
Basic Energy Services
Kilgore, Texas
09.2008 - 07.2012
- Operated rig equipment during drilling operations and maintained safety protocols.
- Monitored drilling fluid levels and adjusted as needed for optimal performance.
- Conducted pre-trip inspections on equipment to ensure proper functioning.
- Ensured that all personnel worked in a safe manner while performing their duties on the rig floor.
- Provided support services such as mudding, casing running, cementing.
- Cleaned and maintained drilling tools, such as drill bits, mud pumps, and other related equipment.
- Assisted in rigging up and down of tools and equipment.
- Monitored well operations to ensure safety regulations were followed.
- Utilized hand tools such as wrenches, hammers, and screwdrivers when performing maintenance tasks.
Derrickhand
Franks Casing
Kilgore, Texas
03.2006 - 09.2008
- Operated drilling equipment to ensure efficient extraction processes.
- Monitored safety protocols to maintain a secure work environment.
- Assisted in rig maintenance to uphold operational readiness and safety standards.
- Coordinated with team members for effective workflow during drilling operations.
- Managed equipment logistics to support continuous drilling activities on-site.
- Listened to operating drills, confirmed normal vibrations and collected material samples from hole to monitor output.
- Operated cranes and other heavy machinery when necessary for derrick work.
- Repaired downhole tools as needed while performing maintenance on a derrick structure.
- Assisted in rigging operations by attaching cables to lifting devices or hoisting equipment.
Education
Longview ISD
Longview, TX09-2026
Skills
- Well Control
- Pressure Control
- H₂S Safety
- Safety
- Preventive Maintenance
- Rig-Up/Rig-Down
- Gauge monitoring
- Inventory Control
- Operational Reporting
- Data Accuracy
- Field Documentation
- Recordkeeping
- Problem Solving
- Supervisor Communication
- Communication
- Teamwork
- Attention to Detail
- Attention to Detail
Languages
English
Full Professional
Spanish
Full Professional
Certification
- Forklift
- PEC
- Manlift
References
- Edgar Cordero- (662)812-9371
- Felipe Aguilar- (214)223-1318
- Mike Cisneros- (432)234-2505
Timeline
Well Testing Operator
GHS Energy Services
05.2026 - Current
Flowback Operator
CP Well Testing
08.2024 - 04.2026
Flowback Operator
Oil Patch
03.2021 - 08.2024
Flowback Operator
Premier Flow Control
11.2017 - 03.2021
Flowback Operator
Select Energy Services
01.2017 - 11.2017
Reverse hand/Field Tool Hand
Eaton Oil Tools
01.2014 - 12.2016
Floor hand/Derrickhand/ Extra Operator
Red Diamond
10.2012 - 11.2013
Floor hand/Derrickhand/ Extra Operator
Royalty Well Service Oil & Gas
07.2012 - 10.2012
Floor hand/Derrickhand/ Extra Operator
Basic Energy Services
09.2008 - 07.2012
Derrickhand
Franks Casing
03.2006 - 09.2008
Longview ISD