A network service is an instance of a software that runs reliably for a period of time and which links together people over space and time.
But who brings together the software needed to run a service? That would be the service maintainer(s). She/he is the one who wields the power of the software to enable communication between people. And linked people communicating build together culture.
To sum up: culture builds on services, which in turn builds upon software and maintainer’s work.