Hello,
I'm an architect and engineer form the corporate (large scale enterprise I.T and electronics) world.
I'm certain I can help you do these diagrams, but before I confirm further interest, can I take a look at the SRS to see how complex the project - and hence the diagrams /design- will be.
I offer these services(UML, diagramming, Business System Analysis, BPM etc), thru other sites as well. See below:
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Let me know if you need help.
Cheers
D.M