Andrew Brown, former head of relations at Auction House London, has joined Strettons.
Strettons raised £7.6m at its 6 February sale, selling 71% of the properties on offer.
A portfolio of 12 JCDecaux billboard sites will go under the hammer on 6 February.
Comment: Simon Tilsiter highlights key areas you should consider for a positive return on investment
A former mosque and community centre in Forest Gate will go under the hammer next week
Strettons raised £9.3m from its October sale, with a success rate of 60% including post sales