Elias15, to clarify: you are coming for business purposes and are entering with your Canadian passport visa free. Does your Jordanian friend wish to enter as a tourist (and your companion) or is the Jordanian in question also coming for business purposes, hence in need of an invitation letter from the business entity inviting him for a conference, business event, etc?
P.S. A Jordanian citizen can enter Montenegro visa free as a tourist for up to 7 days if in possession of a valid Schengen, US, UK or Irish visa.