
Hamza Arif
About Candidate
Experienced Mechanical Technician with over 8 years of experience in the Oil & Gas, LNG, Refinery, and Nuclear Power Plant industries. Currently working at QatarEnergy’s Laffan Refinery, Qatar, with hands-on expertise in preventive and corrective maintenance, troubleshooting, overhauling, and repair of rotating and static equipment, including centrifugal and reciprocating pumps, compressors, gearboxes, valves, heat exchangers, and fin fan coolers.
Previously served as a Senior Mechanical Technician at Pakistan Atomic Energy Commission (PAEC), gaining specialized experience in reactor maintenance, polar and gantry crane operations, heavy lifting activities, and nuclear plant refuelling equipment. Experienced in PTW systems, LOTO, risk assessment, equipment alignment, mechanical seals, hydro testing, and shutdown maintenance activities.
A safety-focused and technically skilled professional with strong leadership, problem-solving, and teamwork abilities, currently responsible for coordinating a team of 12 personnel. Holds a Diploma of Associate Engineering (DAE) in Mechanical Engineering and is committed to maintaining equipment reliability, minimizing downtime, and ensuring safe and efficient plant operations.
Location
Education
685/1050
2683/3450
Work & Experience
▪ Safely lifted and positioned an 89.9-ton Reactor Pressure Vessel (RPV) head onto a storage stand.
▪ Successfully coordinated the placement of a 56.3-ton Missile Shields on RPV Head using a polar
crane, ensuring precise alignment and safety during the operation.
▪ Skilled in operating polar cranes for the safe lifting and placement of 37-ton reactor pressure vessel
(RPV) upper internals onto storage stands and back to the RPV.
▪ Executed the safe lifting and placement of lower internals/core barrel ( 48-tons) on Reactor Pressure
Vessel (RPV) to and from the storage stand using a polar crane. Remove and placed of concrete
blocks & store at 0m below the gantry crane.
▪ Opening and closing of Equipment hatch for shifting refuelling tools and equipment into RX.
▪ Inspection and preventive maintenance of trolley.
▪ Install trolley on outside rail track at +15m level.
▪ Perform inspection and preventive maintenance of polar crane.
▪ Perform inspection and preventive maintenance of Tools and upending device in RX.
▪ Perform function test of conveyor car by using Dummy fuel assembly.
▪ Perform inspection and preventive maintenance of Fuel manipulator crane, control rods, drive shafts
latched and unlatched tool, reactor internal lifting rig, electrical hoists of RPV head lifting rig.
▪ Assembling of RPV Internal lifting rig. Removal and opening of blind flange.
▪ Remove old and install new cavity sealing ring. Dismantling and installed of thermocouple seals and
reactor vessel head.
▪ De tensioning and tensioning of RPV Studs. Install and removal of stud hole plug.
▪ Install threaded sleeves into guide columns installation holes and install guide columns.
▪ Disconnect anti seismic supports from the RPV Head lifting rig.
▪ unlatching and latching all control rod drive shafts.
▪ shifted new fuel assemblies from new fuel storage racks to spent fuel pool where core is to be
arranged.
▪ Install underwater camera on FMC Crane and perform VT of Core top before fuel unloading.
▪ Remove and place FME Cover on RPV if required. Performed insert exchange of RCCA and TPA
assemblies.
▪ Lubricated main studs and nuts with N5000.
▪ verify core loading by using underwater camera and sign witness sheet.
To receive the Job / Work assignment from Senior Mechanical Technician and Foreman.
▪ Organize and plan the daily maintenance and shutdown activities.
▪ Print the Work Permit as per the assigned job and arrange the required tools and equipment.
▪ Responsible as Permit Receiver/Applicant and Worksite supervisor for all plant maintenance
activities.
▪ Operated production and process equipment in LNG and condensate refining units.
▪ Monitored plant parameters such as pressure, temperature and flow rates from control system.
▪ Perform routine equipment checks and reported abnormalities to team.
▪ Followed SOPs, PTW systems and normal operations during operations.
▪ Maintained operational logs and shifts reports accurately.
▪ Coordinated with field operators and control room for smooth production flow.
▪ Inspection and replacement of all type of spare parts for Rotating & Static equipment.
▪ Daily maintenance of Static and Rotary equipment such as Centrifugal, Rotary and Reciprocating
Pumps, Compressors, ID/FD Fans, Blowers, Gear boxes, Fin Fan PM activities, Tubes Plugging,
Exchangers, etc.
▪ Alignment of Pumps with Laser Alignment kit and Dial Method.
▪ Repair and overhauling of Mechanical Seals, Valves, connecting auxiliary equipment, piping / tubing
connections, steam traps, strainers.
▪ Maintenance (PM & CM) and Repair of the Static equipment such as Heat Exchangers and
Columns.
▪ Repair and maintenance of Refinery product and Utility Piping and Pipe Fittings viz. Valves, Steam
Traps, Nitrogen fittings and Hose connection.
▪ Dismantling and assembling of equipment such as Centrifugal and Positive Displacement Pumps,
Mechanical seal replacement, Pump overhauling and repairing activities.
▪ Perform & witness the System final box up, Mechanical equipment Test Run, Lube Oil flushing,
System leak test and inert gas purging.
▪ To perform maintenance works on high pressure equipment and hydraulic tensioning and tightening
of high-pressure joints.
▪ Carry out the Hydro Test preparation and perform Hydro Test on equipment as per the operations
requirement. Carry out blinding and de-blinding of connecting pipelines to equipment.
▪ Knowledge and Capable of reading and observing the P&ID and Isometrics and Cross Section
Drawings of the Equipment.
▪ Performed as PTW Holder, Gas Watch, Hole Watch & Fire Watch as an additional responsibility.
▪ Responsible to carry out the technical services in a safe manner, avoiding risk or danger for
company personnel’s and maintaining company’s assets.
▪ Conducting daily Toolbox talk (TBT) to identify hazard and risk assessment to make everyone aware
about the JSA, Safe Work Procedure & Practices for all routine and non-routine activities and
performing all the tasks with safety precautions and QELNG Life Saving Rules.
▪ Responsibility to manage weekly materials in Store regarding storage and distribution.