UK-based challenger Tandem Bank has named former Vanquis Bank chief Neil Chandler as its new CEO.Chandler will succeed Alex Mollart on 30 June, subject to regulatory approval. Mollart, who took over as CEO of Tandem from Susie Aliker three years ago, is set to retire from employment following a financial services career spanning over three decades.Launched in 2014, Tandem currently employs around 500 people spread across four sites in the UK. With over £1.5 billion in assets under management, the bank recorded a 40% year-on-year increase in profits last year.The challenger describes itself as "the UK's greener, digital bank", offering "greener ways to save, borrow, and spend" to help the UK "transition to a lower carbon lifestyle". It currently offers savings accounts alongside a range of lending products, including motor finance and mortgages.