Mason joins LLM next week to become the consultancy's fourth partner. A former consultant at financial PR agency Brunswick, her brief is to boost LLM's capabilities in regulatory affairs, which are being called upon more often since the firm's acquisition last summer by Financial Dynamics.
She spent five years at Brunswick before joining Bell Pottinger Public Affairs in September 2003 as an associate director. She left the group in December without a job to go to.
She has also previously worked as a parliamentary and European officer at the CBI.
Mason will fill the void left by the exit earlier this month of LLM partner Mark Titterington. He left to head PA at agricultural products firm Syngenta (PRWeek, 3 Feb).
Bearman, meanwhile, joined the 26-strong agency last week. Leviton said she had joined the firm's 'senior management team'.
Bearman was at Lexington Communications for around six years, but since 2003 has acted as a freelance PA consultant.