Hello,
During my studies and experience, 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 with BPM (Business process model) such us collaboration and choreography ...I have experience in Ms Visio too,Feel free please and contact me for more details, we can negociate about price and time, i will be glad to offer you my services.
Regards!