JAMES RUIZ
James.Ruiz605@gmail.com
Midlothian
Summary
Accomplished facilities and data center professional specializing in mission-critical infrastructure. Demonstrates strong operational support in high-availability environments by performing preventive and corrective maintenance on critical power and cooling systems, ensuring system reliability and compliance with safety standards.
Overview
6
6
years of professional experience
Work History
SITE ENGINEER II
Digital Realty
Richardson
08.2025 - Current
- Supported operations in a high-availability, mission-critical data center environment serving single-tenant and COLO suites
- Maintained critical infrastructure systems, including UPS, generators, HVAC, and cooling systems, ensuring operational integrity
- Executed preventive and corrective maintenance to achieve uptime and reliability targets
- Responded to critical system alarms and emergency events, minimizing downtime risk
- Troubleshot electrical and mechanical system issues in a live production environment
- Monitored facility systems using EMS/BMS platforms (Automated Logic, Delta EMS)
- Coordinated with operations teams, vendors, and customers to enhance maintenance activities and streamline processes
- Maintained documentation and updated procedures to improve safety and operational consistency
CRITICAL FACILITIES ASSISTANT CHIEF ENGINEER
Transwestern Asset Services
Irving
03.2020 - 08.2025
- Operated a central plant with (4) 600-ton Trane Centrivac Chillers in a 24/7 N+1 critical environment, ensuring reliable cooling capacity
- Serviced and maintained chillers, pumps, cooling towers, fan-coil units, and fan-powered boxes to ensure reliable operation
- Monitored and inspected central plant and mechanical room equipment, ensuring optimal performance and compliance with standards
- Troubleshot and adjusted building automation and mechanical systems
- Performed preventive maintenance on pumps, valves, and control systems
- Resolved tenant concerns and emergency situations, troubleshooting issues in real time to minimize disruption
- Operated and maintained mechanical, electrical, and plumbing systems for Vistra Corp/TXU Energy
- Ensured compliance with codes, safety standards, and regulatory requirements
Education
Principles of Refrigeration -
Cedar Valley College
Lancaster, TXLindsey Cooper Refrigeration School Diploma -
Lindsey Cooper Refrigeration School
Building Controls & Pneumatics -
North Lake College
Skills
- HVAC
- Cooling Systems
- Generators
- UPS
- Automated Logic EMS
- Delta EMS
- Preventive & Corrective Maintenance
- CMMS (MCIM)
- Maintenance Coordination
- High-Availability/Mission-Critical Environments
- Incident Response
- Hardware Diagnostics
- Change Management
- MOP
- SOP
- EOP
- Microsoft Office (Word, Outlook)
- Vendor Management
Education And Certifications
- NFPA 70E-Certification
- Air Conditioning Contractors of America-Universal EPA License #46576
- OSHA 10-Hour General Industry Safety Training-Certificate
- Cedar Valley College - Principles of Refrigeration
- Bearing Application & Technology
- Trane All Variable Speed Chilled Water Plants-Certificate
- Texas TDLR A/C Certification License #63249
- Lindsey Cooper Refrigeration School Diploma & Certification
- North Lake College-Building Controls & Pneumatics
- York YT Commercial Chiller Operators Class
- Trane XL 1800 Class-Certificate
- Bearing Troubleshooting-Certificate
Timeline
SITE ENGINEER II
Digital Realty
08.2025 - Current
CRITICAL FACILITIES ASSISTANT CHIEF ENGINEER
Transwestern Asset Services
03.2020 - 08.2025
Principles of Refrigeration -
Cedar Valley College
Lindsey Cooper Refrigeration School Diploma -
Lindsey Cooper Refrigeration School
Building Controls & Pneumatics -
North Lake College