I have been part of screening applicants for technical roles within networking, but I am _not_ an expert on hiring/application screening practices by any means. Here are my 2 cents:
Any education at the university level should probably be included on his CV. If I saw that on his CV/resume I would think of it as a positive that he has breadth of knowledge, even though it is often not directly related for network engineering. Data science and ML is very much in the wind these days and would be a huge plus for the right role/organisation, and is likely to be something people are looking for when hiring these days.
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