I'm guessing here, but one way might be...

2013 - present: MNC Bank presenter at lectures and events both internal and external.

2013 - present: Sr. RM at MNC Bank with rank of Asst. Vice President.

I'm not sure if it is a good idea to list your roles separately, or whether it is better to list these as your responsibilities within a single position. You might want to consult someone who is more used to this.