MOHAMMAD SHAMIM KHAN

Senior HVAC & Chiller Specialist Technical Mastery in Thermal Systems

[email protected], Jeddah, Saudi Arabia

About

Highly experienced HVAC and Chiller Technician with over 20 years of expertise in the operation, maintenance, and repair of diverse commercial and industrial refrigeration and air conditioning systems. Proven ability to troubleshoot complex issues, optimize system performance, and ensure efficient operation of reciprocating, centrifugal, and screw chillers, alongside various AC plants and heating equipment. Seeking a challenging role to leverage extensive technical skills and contribute to operational excellence in a reputable organization.

Work Experience

Site Supervisor

AVAR Operation and Maintenance

Jun 2024 - Present

Jeddah, Western, Saudi Arabia

Responsible for end-to-end supervision of daily data center operations, ensuring optimal system performance, regulatory compliance, and continuous uptime. Monitor critical infrastructure components—including electrical, mechanical, and life safety systems—from upstream to downstream, such as fire detection and suppression, firefighting systems, UPSs, PDUs, transformers, ATSs, chillers, chilled water circuits, CRAH units, AHUs, and fresh air systems.

  • Demonstrate hands-on expertise in troubleshooting chillers (centrifugal, reciprocating, screw), chiller pumps, CRAC units, AHUs, and Vertiv EFC systems for fault isolation and rapid resolution.
  • Monitor infrastructure health and respond promptly to critical and minor incidents to minimize downtime
  • Schedule and oversee preventive and corrective maintenance activities for all MEP systems
  • Manage vendors and third-party service providers for efficient equipment repairs and service delivery
  • Ensure functionality of all redundancy systems and backups across operational infrastructure
  • Maintain compliance with safety, security, and environmental regulations within data center operation
  • Oversee all technical components from upstream to downstream—including fire detection/suppression systems, UPSs, PDUs, busways, ATSs, transformers, chillers, CRAH, AHU, and fresh air system
  • Conduct daily facility walk-rounds and system monitoring to identify and resolve alarms via control panels and workstation interfaces.

MEP Team Leader

Engie Cofely Energy Services

Jun 2022 - Jun 2024

Dubai, Dubai, United Arab Emirates

MEP Team Leader – Data Center Operations Currently overseeing comprehensive maintenance and operational efficiency of critical HVAC infrastructure across Tier-certified data center environments. Responsible for the supervision and performance optimization of advanced thermal systems, including Trane and York chillers, CRAC units, Fan Wall Units (FWU), AHUs, and supplementary mechanical cooling assets. Lead a multidisciplinary team to ensure seamless functionality, uptime compliance, and precision climate control across high-density commercial facilities. Collaborate with engineering teams to execute preventive and corrective maintenance programs, drive energy efficiency initiatives, and uphold safety and operational standards.

  • Conduct routine and corrective maintenance across diverse HVAC systems, including commercial freeze chillers, heating units, and various AC configurations, to sustain optimal performance in critical environments.
  • Expertly diagnose and resolve mechanical and electrical faults in large-scale chillers such as York 200TR reciprocating water-cooled, Trane 400TR centrifugal, and Denham Bush 200TR screw units, minimizing downtime and enhancing reliability
  • Execute precision repairs and component replacements for Carrier split-type systems (2–5 tons) and LG 10–20TR reciprocating package units, ensuring extended equipment lifecycle and operational stability.
  • Implement structured preventive maintenance programs, driving energy efficiency and reducing unplanned outages across mission-critical building infrastructure

HVAC Technician

Almajal G4S

Jan 2012 - Dec 2020

Riyadh, Central, Saudi Arabia

Provided expert HVAC technical services, specializing in the maintenance, repair, and installation of various commercial and industrial air conditioning and refrigeration systems.

  • Managed comprehensive maintenance programs for diverse AC plants and chiller systems, ensuring continuous operation and compliance with industry standards.
  • Successfully identified and resolved complex faults in large-scale commercial chillers, including reciprocating, screw, and centrifugal types, minimizing operational disruptions.
  • Conducted regular inspections and performance tests on heating and cooling equipment, proactively addressing potential issues and improving system efficiency.
  • Trained junior technicians on best practices for HVAC system diagnosis and repair, enhancing team capabilities and service quality.

Chiller Technician

Johnson Control

Aug 2007 - May 2012

Delhi, NCR, India

Specialized in the maintenance and repair of all types of York chillers, ensuring optimal performance and reliability for commercial and industrial clients.

  • Expertly maintained and repaired a full range of York chillers, including reciprocating, centrifugal, and screw types, ensuring system longevity and efficiency.
  • Performed detailed diagnostics to pinpoint issues in complex chiller systems, leading to efficient and effective repair solutions.
  • Executed routine preventive maintenance on chiller units, significantly extending operational life and reducing unexpected breakdowns.
  • Collaborated with engineering teams to implement system upgrades and modifications, improving overall cooling capacity and energy efficiency.

Maintenance Technician

Hotel Flyover Classic Four Star Patila

Jul 2006 - Aug 2007

Patila, Punjab, IN

Maintained all operational equipment and systems within a four-star hotel environment, ensuring guest comfort and facility functionality.

  • Managed the upkeep and repair of hotel HVAC systems, including split and package AC units, ensuring consistent comfort for guests.
  • Addressed a variety of maintenance issues across the facility, from plumbing and electrical to general equipment repair, ensuring rapid resolution.
  • Conducted daily inspections of critical hotel infrastructure, proactively identifying and resolving potential operational disruptions.
  • Responded promptly to maintenance requests, maintaining high standards of service quality and guest satisfaction.

Maintenance Technician

PepsiCo Holdings India Private Limited

Aug 2002 - Jun 2006

Patila, Punjab, IN

Contributed to the operational continuity of a large-scale manufacturing plant by maintaining critical machinery and utility systems.

  • Performed routine and emergency maintenance on industrial refrigeration and air conditioning units crucial for production processes.
  • Troubleshot and repaired mechanical and electrical components of plant machinery, minimizing downtime and supporting continuous operations.
  • Assisted in the installation and commissioning of new equipment, ensuring proper integration and functionality.
  • Adhered to strict safety protocols and maintenance standards within a fast-paced manufacturing environment.

Air Cool Technician

Voltas Workshop

Aug 2001 - Jul 2002

New Delhi, Delhi, IN

Gained foundational experience in the repair and service of air-cooled refrigeration systems at a specialized workshop.

  • Assisted senior technicians in the diagnosis and repair of various air-cooled AC units and refrigeration systems.
  • Performed hands-on component replacement and system testing to ensure proper functionality after repairs.
  • Learned best practices for refrigerant handling, system charging, and leak detection.
  • Contributed to the efficient turnaround of service requests, supporting workshop productivity.

Education

Refrigeration Air Conditioning

Industrial Training Institute

Jan 1999 - Dec 1999

Pratapgarh, UP, IN

Intermediate (12th Grade)

UP Board

Jan 1997 - Dec 1997

Unknown, UP, IN

High School (10th Grade)

UP Board

Jan 1995 - Dec 1995

Unknown, UP, IN

Languages

Arabic (Proficient) , Urdu (Fluent) , Hindi (Native) , English (Proficient)

Skills

HVAC Systems & Equipment

  • Commercial Freeze Chillers
  • Heating Systems
  • Reciprocating Chillers (York 200TR, LG 10-20TR)
  • Centrifugal Chillers (York 400TR)
  • Screw Chillers (Denham Bush 200TR)
  • Split Type AC (Carrier 2-5 tons)
  • Package AC Units
  • AC Plants
  • Refrigeration Air Conditioning
  • Chiller Systems (All types)

Technical Operations & Maintenance

  • Troubleshooting
  • Preventive Maintenance
  • Corrective Maintenance
  • System Diagnostics
  • Equipment Repair
  • Component Replacement
  • Performance Testing
  • Installation
  • Commissioning
  • Refrigerant Handling
  • Leak Detection
  • Heavy Machinery Operation

Problem Solving & Analysis

  • Problem Solving
  • Root Cause Analysis
  • System Optimization

Professional Skills

  • Communication Skills
  • Time Management
  • Team Collaboration
  • Safety Compliance
  • Computer Literacy