Sitambi Ndumba

harnesses and sensors.Assisted mechanical technicians in deploying
downtime.Maintained workshop testing benches, calibration tools,
daily toolbox talks and risk assessments before executing field

software to clear
complex, intermittent electronic faults across multiple Komatsu PC
200-8 units.Conducted deep-dive testing on the main pump
controllers, electronic throttle systems, and proportional solenoid
valves.Calibrated the electronic hydraulic control systems to factory
specifications, reducing machine cycle times and improving fuel
efficiency by ., 8%.
Chibu south open pit

Atlas ST1030 loaders and MT436 / MT2030 minetrucks to
ensure optimal underground haulage availabilityCalibrate,
utilizing the Rig Control System (RCS) interface to maintain drilling
accuracy. compliance Mining
zero-harm record.
Deployed Atlas Copco RCS and Sandvik SICS platforms to program,
calibrate, and troubleshoot intelligent underground drill rigs
(Boomer 282, Boomer S1D) and loading fleets (ST1030, TH515).
Executed advanced auto-electrical maintenance, breakdown
response, and component overhauls across Sandvik TH307, TH410E,
and Atlas Copco MT436/MT2030 haulage units.Served as the primary
site electrician for Chinese-manufactured fleets, managing wiring
and control systems on XWD MT UK 30, UK 20, and UK 12
machines.Interfaced with Cummins, Volvo, and Deutz engine
management systems to diagnose electronic faults, clear error
codes, and optimize engine performance parameters.Read and
interpreted intricate multi-page hydraulic-electrical schematics to
isolate difficult intermittent wiring harness faults.Enforced strict
Lock-Out Tag-Out (LOTO) protocols and active risk assessments
across all shifts.

Diagnosed complex auto-electrical and electronic faults on Komatsu
PC 200-8 earthmovers. Conducted 250/500/1000-hour scheduled
preventative electrical maintenance inspections on heavy
underground mining machinery.Rebuilt starter motors, alternators,
control panels, and lighting systems to baseline OEM
specifications.Responded to high-pressure emergency machine
breakdowns underground, safely restoring production
capacity.Tracked and reported repetitive component failures to
engineering teams to improve fleet reliability.