Travel software firm Datalex has appointed Niall O'Sullivan as its chief financial officer.

Mr O'Sullivan will take up his position in June.

Before joining Datalex, Mr O'Sullivan was Finance Director at Google, where he was responsible for  accounting, financial compliance and contractual controls for the EMEA region.

He has also worked at Pearson, Vodafone, Oracle and Dell.

Datalex's former chief financial officer Dónal Rooney announced in February that he would step down from the board after joining the company in December.

Earlier this month, Aidan Brogan resigned as Datalex's chief executive with immediate effect with his departure coming less than a week after the company's chairman - Paschal Taggart - said he would step down.

Datalex said that Sean Corkery - its deputy chairman - will take up executive responsibility as acting CEO, while the Board undertakes a search for a permanent CEO. 

Shares in the troubled company are temporarily suspended as the company was not in a position to meet a regulatory deadline to publish its accounts, as scheduled, on April 30. 

In January, Datalex announced that it had mis-stated its 2018 earnings after some services revenue was wrongly recorded, leading it to forecast a loss of up to $4m for the full year.

PwC was hired to conduct a review of its finances and it substantiated the claim that the company's finances had been misstated.

The review identified "significant accounting irregularities", which prompted it to overhaul its finance function and implement improved controls.

The firm has also undertaken a cost-cutting programme and raised €10m in new funding from Dermot Desmond's investment vehicle IIU.

Shares in Datalex have lost over 60% of their value since the company issued that profit warning in the middle of January.