I am developing a desktop app which needs to be tested on OSX 10.7 through 10.11 on virtual machines (virtualized on a mac)
I was under the impression getting a developer account would get me access to older builds of OSX but I'm not able to find it.
Certain older OS Xs (10.6; 10.7; 10.8) are for sale in the Apple Store online.
Good luck finding 10.9 & 10.10 if you didn't already own them in the past. 10.11.3 is in the MAS now.
There are incremental updaters available at https://developer.apple.com/downloads/ but there are no full versions available otherwise available from Apple, unless they exist in your purchase history via the MAS. 10.11 is available via the MAS.
