[1] He studied Natural Sciences at Gonville and Caius College, Cambridge, graduating with a Bachelor of Arts (BA) degree.
[1][2] He undertook a Doctor of Philosophy (PhD) degree in Cambridge's Department of Pathology on Salmonella infections and graduated in 1986.
[3] His doctoral thesis was titled "Mechanisms of resistance and immunity to salmonella infections" and was submitted in 1985.
[12] Following a series of campaigns and protests by the National Tertiary Education Union's Casual Network, including a protest outside the Vice Chancellor's 33 room residence, Maskell issued an apology regarding underpayment, saying there was “a systemic failure of respect from this institution" towards insecurely employed staff.
[13][14] Following the impact of the COVID-19 pandemic on travel and immigration, the university was affected due to its reliance on revenue from international students.