Hello,
During my studies and experience since 2015, I already modeled business processes with Bizagi Modeler according to bpmn 2.0 standard, so I can do this work for you, I inform you that I can design all diagrams having relation with BPM (Business process model) such us collaboration and choreography ...
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.
You can see here some similar projects:
https://www.fr.freelancer.com/projects/writing/Bizagi-Documentation-Standardization/proposals
https://www.fr.freelancer.com/projects/word-processing/Document-Business-Processes/proposals
Best Regards!