While pursuing BSc in Mechanical Engineering at JKuat, I got interested in a field of mechanical Engineering called Thermofluids.
And when I was searching for a postgrad project I was keen to take up a Thermofluids related project. That is how I came across my PhD project (aircraft engine cooling) at the University of Oxford. That is how I ended up in aerospace. Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft.