Associates Katherine Hobby's and Suzanne Ellis' promotions to the board were announced today and they will join 21 existing board members.
Hobby, who joined Lansons as a trainee ten years ago, was promoted to associate in 2012 and her key client relationships include MoneySuperMarket and The Isle of Man Government.
Ellis joined Lansons as an associate last year, with a focus on senior leadership development programmes, and has worked extensively with the public and private sectors.
Lansons also announced the promotions of Emma Beresford, Maddy Morgan Williams, Alice Stevens and Jess Warner to the title of associate director.
Beresford started at Lansons four years ago, Williams has been with the company since 2010, while Stevens and Warner have worked for the agency since 2009 and 2013 respectively.
Tony Langham, chief executive of Lansons, said he was "determined to ensure that Lansons remains the best large agency to work at in the UK", adding that the promoted individuals "embody the skills, expertise and personalities which we believe will allow us to deliver on this goal".