UK Asset Resolution (UKAR) was established in October to merge the two financial businesses and has appointed the agency to provide face-to-face meetings between its 2,200 employees.
A total of 30 sessions being held in York, Sunderland and Newcastle are kicking off the events this month and are set to inform delegates of the reasons behind the merger.
A management conference for 250 was held at The Monastery, in Manchester, on 12 November, with a further event for another 50 managers taking place a week later.
UKAR was established to manage the closed mortgage books of Bradford & Bingley and Northern Rock (Asset Management), which have been taken into government ownership.
Bradford & Bingley managing director Richard Banks is now chief executive of UKAR.
In January, five events for up to 500 delegates each will be held as part of the communications strategy.
HGA Creative's live events director Ian Grime said: "The new business wins mean that clients really appreciate our creativity and strategy to produce events which deliver real results."
Meanwhile, the agency has been appointed by Vimto's parent company Nichols plc to provide an internal event for 100 staff in December, and for 400 delegates from IT training academy Zenos, which has worked with HGA since it was formed in 2001.
37 events being held for UKAR
£90bn mortgage loans held by UKAR
2,200 employees attending merger meetings