Mission Critical Data Center Engineer – Night ShiftNesco Data Center and Infrastructure is seeking a Mission Critical Data Center Engineer in the Greater Ashburn VA area. We are seeking an experienced Mission Critical Data Center Engineer to support the safe, reliable, and continuous operation of a mission-critical data center environment on the night shift. This position is responsible for monitoring, operating, troubleshooting, and maintaining critical facility infrastructure and mechanical/electrical systems that support 24x7 data center operations. The ideal candidate has hands-on experience working in a mission-critical environment and understands the importance of preventative maintenance, operational procedures, emergency response, documentation, and strict adherence to safety and change-control processes. The successful candidate will have a strong facilities background and experience with the infrastructure systems that provide power, cooling, environmental control, fire/life safety, and building management for a high-availability data center. Pay range is $42-56/hr + 10% NDMission Critical Facilities Operations Monitor and operate critical data center infrastructure and building systems during the overnight shift. Perform routine inspections of electrical, mechanical, HVAC, and life-safety systems. Monitor facility conditions, alarms, temperatures, humidity, power utilization, and equipment status. Respond promptly to alarms, abnormal operating conditions, equipment failures, and facility emergencies. Perform equipment rounds and document operating conditions, readings, deficiencies, and corrective actions. Maintain situational awareness of facility load, capacity, redundancy, and equipment operating status. Follow established operating procedures, emergency operating procedures, and standard operating procedures. Participate in 24x7 on-call and/or emergency response activities as required. Electrical SystemsExperience operating and/or maintaining critical electrical infrastructure such as: Utility service and electrical distribution systems Switchgear and switchboards Automatic Transfer Switches (ATS)UPS systems and battery systemsPower Distribution Units (PDUs) Remote Power Panels (RPPs) Transformers Generators and emergency power systems Automatic transfer and emergency power systems Electrical panels and distribution equipment3-phase electrical systemsPower monitoring and metering systems The engineer should understand electrical distribution, redundancy concepts, load balancing, power flow, and the risks associated with working around energized equipment. Mechanical / Cooling SystemsExperience with mission-critical cooling infrastructure, including: Chillers and chilled-water systems Cooling towers and condenser-water systemsCRAH/CRAC units Pumps and pumping systems Computer Room Air Handling systems Air-handling and ventilation systems Humidification/dehumidification systems Heat exchangers Cooling Distribution Units (CDUs) Direct-to-chip and/or liquid cooling systems is a plus Building HVAC systems Temperature and humidity control systems Building Management & Monitoring Systems Monitor and respond to alarms through Client/EPMS/DCIM platforms. Review trends and operating data to identify abnormal conditions before they become failures. Understand critical alarm priorities and escalation procedures. Document alarm events, equipment status, and corrective actions. Work with remote monitoring and control systems to verify equipment operation. Experience with systems such as Client, EPMS, DCIM, or similar monitoring platforms is strongly preferred. Preventative & Corrective Maintenance Perform or coordinate preventative maintenance on critical infrastructure. Assist vendors and contractors during scheduled maintenance activities. Troubleshoot equipment and determine appropriate corrective actions. Verify completed maintenance activities and return equipment to normal operating configuration. Maintain accurate maintenance records and equipment documentation. Identify recurring equipment issues and recommend improvements. Support reliability and continuous-improvement initiatives. Emergency Response Respond immediately to critical alarms and facility emergencies. Execute emergency operating procedures and established escalation protocols. Troubleshoot power, cooling, environmental, and mechanical failures. Communicate effectively with management, security, vendors, customers, and other technical personnel during incidents. Participate in incident investigations and root-cause analysis. Maintain composure and sound judgment during high-pressure situations. Change Management & Documentation Follow formal change-management procedures for all critical facility work. Review Method of Procedures (MOPs), Standard Operating Procedures (SOPs), and Emergency Operating Procedures (EOPs).Participate in MOP/EOP reviews and execution. Maintain shift logs, equipment logs, work orders, incident reports, and operational documentation. Provide detailed shift turnover to incoming engineering personnel. Ensure all work is performed in accordance with site procedures and established safety requirements. Required Qualifications3–7+ years of experience in data center facilities, mission-critical facilities, critical infrastructure, industrial facilities, semiconductor facilities, hospitals, power plants, or a similarly complex operating environment. High school diploma or equivalent required. Associate's or Bachelor's degree in Electrical Engineering, Mechanical Engineering, Facilities Management, Engineering Technology, HVAC, or a related technical discipline preferred. Equivalent military, technical-school, apprenticeship, or hands-on mission-critical experience may be considered in lieu of a formal degree. Demonstrated experience operating and troubleshooting critical electrical and/or mechanical systems. Ability to read and understand electrical one-line diagrams, mechanical drawings, equipment manuals, and technical documentation. Strong understanding of electrical and mechanical safety practices. Experience working in a 24x7 mission-critical environment preferred. Ability to work independently during an overnight shift while maintaining strong communication with day-shift personnel and management. Strong written and verbal communication skills. Strong attention to detail and documentation skills. Ability to prioritize multiple alarms, work orders, and operational issues based on criticality. Preferred Qualifications & Certifications Preferred candidates may possess one or more of the following: Data Center Certified Associate (DCCA) or equivalent data center certification Certified Data Center Professional (CDCP) Certified Data Centre Specialist (CDCS)BICSI credentialsOSHA 10 or OSHA 30EPA 608 certification Electrical or HVAC certificationsNFPA training Generator or UPS manufacturer training Client/Client/EPMS/DCIM training Electrical safety / NFPA 70E training Lockout/Tagout (LOTO) trainingCPR/AED/First Aid certification Facilities or stationary engineering certification Journeyman electrical, HVAC, or mechanical license is a plus Safety & Compliance Strictly follow OSHA, NFPA, site-specific safety requirements, and company policies. Follow Lockout/Tagout and electrical safe-work practices. Utilize appropriate PPE when performing inspections, maintenance, and troubleshooting. Maintain a safety-first mindset when working around energized electrical equipment, rotating machinery, high-voltage systems, pressurized systems, refrigerants, and other hazards. Report unsafe conditions immediately. Participate in safety meetings, training, audits, and emergency drills. Night Shift Requirements Night shift availability is required. Ability
