Job Description. Principal – Lumwana International School. Lumwana Mine, Solwezi, Zambia. Reporting to: General Manager – LPDC. Lumwana Mining Company Limited (LMC), a copper mining company owned by Barrick Gold Corporation is situated in the North Western region of Zambia, some 300 km west of the Zambian Copperbelt and 95 km south west of the provincial capital of Solwezi.