20 years is a lot of networks...
I was there from the beginning of commercial PC networking... using an early version of Novell's NetWare (1985) to automate a medical transcription unit at a community hospital, consulting to a regional bank during an acquisition when dozens of branches needed new file, print and messaging servers; helping a small college make over their network to provide better academic and administrative computing services.

Today, networks are built to help organizations meet their objectives. Formerly isolated workgroup or departmental solutions must fit into a larger picture. Aligning computer technology with organizational requirements means hiring someone who has experience integrating a diverse range of products. Attention to detail is critical. Everything must work together.  We are in the age of post-Internet computing....