The agency is working on a project basis to support the firm through a restructuring period that will lead to significant job losses among its 3,800 staff.
Biss, under its CEO and chairman Graham Lancaster, is providing internal and external comms support, including national and local media relations management and communication with other stakeholders during the restructuring process.
The agency's public affairs arm, Apex, has also been brought in to liaise with the local authorities that cover its four sites in Bradford, Sheffield, Peterborough and London.
Lancaster said: 'Over the years we have been involved in a number of these situations. Experience counts - there is no time to be on a learning curve. You have to communicate professionally, clearly and sensitively to people whose jobs may be affected, but people remaining must also feel positive about the future of the business.'