The answer is NO if he/she is network engineer. but he/she should have known all the routing& switching commands for better network establishment and should have better knowledge of networking like about LAN,WAN, Routing Protocols.
The anser is Yes if he/she is a system admin/ dealing with Active directory services.but here also he/she dont need extra coding laguages or technologies. they should get grip on the pre-defined commands(cmdlets) for powershell management which helps and brings down the difficult to simple while creating & managing Active directory services