If I may clarify, SAP is an ERP -- Enterprise Resource Planning system. It's an application that is employed to help not only the Logistical movement of goods but Purchasing and Reverse Logistics. It's used for managing Inventories too. The modules are more related to a different occupation entirely. SAP Functional Administrator knows the modules in SRM (Supplier Relationship Management), HR, PP, CRM because it allows us to save time and customize the Enterprise software if you are a Subject Matter Expert for Inventory and Logistics. It lets you envision the cost-saving by acquiring a deep understanding of the UI and the expected purpose of the Functionality. You can pick up fairly quickly if you are moving from Logistics/Operations.
The single point I've done freelance was as a Consultant/Accenture and most newly as an SAP Logistics Engineer. In my role with Expeditors, I was regarded as a value-added. My clients were fortunate 100 that encountered such growth that strategy in deciding locations of fulfillment centers was not a priority. I would get data in an unusual manner (or not at all) and targeting a goal to find the center of gravity using an algorithm to find where a client's supply/demand points were located.
1. Geo-code the end customer with lat/longs.
2. Ran models and scenarios for alternatives.
3. Transportation costs incl. Multi-mode
4. Developed Visual displays/presentations that displayed the supply chain network design I had instituted and tested with optimization call-outs that saved 3-7% on $50M dollar projects and above.
You can learn SAP Logistics courses online to upgrade your skills by getting certified in any of the courses.