Darwin Turnbull
Colbert,OK
Summary
Dynamic Chief Engineer with expertise in facility management, project oversight, and energy efficiency. Proven track record in leading teams to enhance operational reliability and improve guest experiences through innovative renovation projects.
Overview
1
1
Certification
34
34
years of professional experience
Work History
Chief Engineer
Choctaw Casino & Resort
Durant , OK
01.2017 - 03.2026
- Led engineering team in maintaining facility infrastructure and utilities.
- Coordinated maintenance schedules for critical systems, ensuring optimal functionality and reliability.
- Oversaw renovation projects enhancing guest experience while meeting safety standards.
- Managed technical staff training on safety protocols, fostering a culture of compliance and operational excellence.
- Implemented energy-efficient solutions, reducing operational costs at resort.
- Collaborated with vendors for procurement of engineering supplies and services.
- Developed preventive maintenance programs, minimizing equipment downtime.
- Ensured compliance with local regulations regarding building codes and safety standards.
Chief engineer & owner
Turnbull refrigeration
Durant, Oklahoma
01.2006 - 01.2017
- Led engineering projects for refrigeration systems and energy-efficient designs.
- Managed cross-functional teams to ensure timely project completion and compliance.
- Developed maintenance protocols for refrigeration equipment to enhance reliability.
- Implemented quality control measures to meet industry standards and safety regulations.
- Trained and mentored junior engineers in technical skills and project management.
- Evaluated emerging technologies to improve system performance and sustainability practices.
- Performed regular inspections of equipment to identify areas of improvement or repair needs.
- Oversaw maintenance and continuous operation of building systems, including mechanical (HVAC), electrical and safety.
- Managed capital improvement projects to keep expenses within operational budgets.
- Collaborated with other departments within the organization to meet shared objectives.
- Provided leadership and guidance to junior engineers on day-to-day tasks.
- Oversaw activities of contractors working within building and on job sites.
- Ensured that safety protocols were followed at all times during engineering operations.
- Maintained records of engineering activities including materials used, labor costs.
- Identified facility deficiencies, incorporating repair actions into maintenance procedure schedule.
- Reviewed blueprints and schematics for accuracy prior to implementation.
- Evaluated current processes and developed actionable improvement plans that enhanced operational effectiveness.
- Identified potential risks in engineering projects and created targeted mitigation plans to ensure project success.
- Developed and implemented comprehensive engineering plans to ensure successful project completion.
- Troubleshot conflicting design and development requirements and special material requirements.
- Assisted in development of corporate plans and managed infrastructure upgrades, equipment replacements and building modifications.
A/c tech
Schindler refrigeration
Pilot Point, Texas
01.2001 - 01.2006
- Installed and repaired heating and cooling systems in residential and commercial properties.
- Installed new AC units according to manufacturer's specifications.
- Repaired and replaced worn or defective parts in existing AC systems.
- Performed preventive maintenance on AC equipment to ensure peak performance.
- Conducted routine maintenance checks on HVAC units to ensure optimal performance.
- Diagnosed malfunctions using specialized tools and equipment for effective repairs.
- Identified and analyzed air conditioning issues to determine necessary repairs. and addressed issues with low voltage, compressors, reverse valves, blowers, and condenser motors.8
- Inspected ductwork for insulation integrity and proper connections.
- Adhered to safety protocols while handling tools and working on HVAC systems.
- Maintained accurate records of services performed and parts used for inventory management.
- Collaborated with team members to complete projects within set timelines and standards.
- Trained junior technicians on best practices in installation and repair techniques.
- Fabricated and welded customized or unavailable components for air conditioning systems in support of entire company to meet unique needs and return systems to full operation quickly.
- Provided exceptional customer service by addressing client inquiries and concerns promptly.
A/c tech
Coffeys service
Denison, Texas
01.1997 - 01.2001
- Installed, maintained and repaired air conditioning, heating, ventilation and refrigeration units in homes, commercial buildings, and large industrial complexes, completing projects on schedule.
- Installed new AC units according to manufacturer's specifications.
- Performed routine maintenance on air conditioning units for optimal performance.
- Diagnosed HVAC system issues using industry-standard tools and techniques.
- Repaired refrigerant leaks and replaced faulty components effectively.
- Fabricated and welded customized or unavailable components for air conditioning systems in support of entire company to meet unique needs and return systems to full operation quickly.
- Collaborated with team members to complete installation projects on schedule.
- Educated clients on energy-efficient practices and system usage tips.
- Supported training efforts for new technicians on safety protocols in a hands-on environment.
- Assisted in training junior technicians on proper installation techniques.
A/c tech
Kings heat and sir
Bonham, Texas
01.1992 - 01.1997
- Installed and repaired heating and cooling systems in residential and commercial properties.
- Performed routine maintenance checks on HVAC units, enhancing reliability and performance.
- Diagnosed malfunctions with specialized tools, facilitating timely and effective repairs.7
- Coordinated with team members to complete projects on schedule, meeting established standards.
Education
Some College (No Degree) - Trade Technology
Grayson College
Denison, TXSkills
- Facility management
- Infrastructure management
- Project management
- Preventive maintenance
- Energy optimization
- Energy conservation
- Building codes compliance
- Vendor collaboration
- Quality assurance
- Risk assessment
- Budget management
- Strategic planning
- Workflow optimization
- Team leadership
- Team direction
- Technical instruction
- Equipment operation
- Problem resolution
- Client engagement
- Effective communication
- Time management
Certification
- Texas a/c license
- Okla a/c license
Timeline
Chief Engineer
Choctaw Casino & Resort
01.2017 - 03.2026
Chief engineer & owner
Turnbull refrigeration
01.2006 - 01.2017
A/c tech
Schindler refrigeration
01.2001 - 01.2006
A/c tech
Coffeys service
01.1997 - 01.2001
A/c tech
Kings heat and sir
01.1992 - 01.1997
Some College (No Degree) - Trade Technology
Grayson College