[diek]

SDLC is often used to emphasize that you need to be familiar with the full "Software Development Lifecycle". When I read SDLC I just assume they mean, "you need to be able to take a project from concept to deployment (including documentation for supporting it long term)". Depending on org structures, a lot of engineers only work on one part of that pipeline throughout their career.

[burfog]

Nah, this is clearly an IBM mainframe shop. SDLC is a layer 2 network protocol in the SNA stack.

https://en.wikipedia.org/wiki/Synchronous_Data_Link_Control