Amid mounting pressure for an overhaul of Transnet management, the organisation’s head of Freight Rail says her decision to exit the organisation was a personal one. Transnet Freight Rail CEO Sizakele Mzimela announced her resignation in a letter to staff on Thursday morning. Mere hours later, she presented to the mining industry at the Joburg Indaba in Sandton. Mzimela was reluctant to discuss her resignation, save to say, "It’s a personal choice. When things change, you decide whether you fit in or don’t fit in and whether you align or don’t align. And I will leave it at that." Mzimela will step down at the end of October after three years at the helm of Transnet Freight Rail. Her exit follows days after that of Transnet Group CEO Portia Derby and CFO Nonkululeko Dlamini. Mzimela’s presentation spoke to the notable challenges faced by the rail business, including a shortage of locomotives and an underinvestment infrastructure. The loco shortage follows an inability to procure spares from the China Railway Rolling Stock Corporation.