Allow assignment to multiple agents on a ticket

Our organization has team responsibilities separated amongst multiple people within a team. Every responsibility assignment has at least 2 assignees, a primary and a backup, but sometimes more.  For example, our infrastructure team has 6 people on it but only 3 of them are contacts for the firewall.  2 different people are responsible for active directory administration, and 2 other people handle our trading application.  Assigning tickets to a group, but only one agent, means that the backups to the process are not primary on the tickets.  Creating separate groups for the way the team has their responsibilities divided up is not manageable either, as there would be ~50 infrastructure groups.  Our applications development team is similarly split up with their areas of responsibility.  We have used Magic’s helpdesk in the past and are currently working to replace FootPrints with Freshserver.  Both Magic and FootPrints allow multiple assignees.