Complex sentence: She played notable strategic roles played during the Merger process of the erstwhile United Bank for Africa & Standard Trust Bank where amongst other she co-chaired the Branding Sub-Committee and also a key member of the Media Relations Sub-Committe.
Split into simpler sentences: She played notable strategic roles during the Merger process of the erstwhile United Bank for Africa & Standard Trust Bank where she co-chaired the Branding Sub-Committee. She also served as a key member of the Media Relations Sub-Committe.