Hello,
During my studies and experience, as engineer in information system and modeling of data, I already modeled business processes with Bizagi Modeler, so I can do this work for you, I inform you that I master all diagrams having relation to BPM (Business process model) such us collaboration and choreography. I can send you some of my previous work elaborated with bizagi modeler.
Feel free please and contact me for more details, we can negotiate on price and time, I will be glad to offer you my services.
Regards!