You learn from both the big and the small guys in the field. Many of the supply chain consultants also develop and market their own software systems. If you are looking for a supply chain software program for your business, you might look in here also. The rest are small and specialized. Some good reading from the net.
Some articles are the on-line electronic version of their printed paper form.
I have included a small sample here so that you get to know the recent development in the field. These are self-published, but they do contain some descriptions of the product features and applications, which might be useful if you are in the market for a software package. Seminars, academic courses and executive education programs. Since I am not currently looking for a job, I did not make much effort in searching for supply chain related positions. My purpose here is to sample the typical job requirements so that you can better prepare for the positions.