A board should ideally have a mix of people from all fields, including the core business.
Managers really should have direct experience in the field being managed. The 90s concept of generic management is purely a misguided philosphy dreamt up by MBA academia in order to: a) justify their own existance; b) fill gaps caused by deteriorating career development within organisations; and, c) write more essays with bulleted lists.
Airservices provides little or no career development for ATCs either vertically within the chain of command or horizontally between different groups. The ATC's lot is a dull one.