Complex sentence: He worked as a miner, postman, chef, and accountant, and rose to the rank of Captain in the Territorial Army, before setting up his own company of Civil Engineers (Marples, Ridgeway & Partners-Primarily road construction) with a bank loan.
Split into simpler sentences: He worked as a miner, postman, chef, and accountant. He set up his own company of Civil Engineers (Marples, Ridgeway & Partners-Primarily road construction) with a bank loan.