Pressure Technologies announced that Finance Director James Lister will step down as finance director on 30 June, to permanently retire on 1 September.He will be succeeded on 13 July by Joanna Allen, who has been a director in PricewaterhouseCoopers' assurance practice for seven years."I am delighted to welcome Joanna to Pressure Technologies and I am sure that her extensive experience of finance in general and acquisitions in particular will be a strong asset to the board," chairman Alan Wilson said in a statement.As of 9:30 BST, Pressure Technologies was trading 2% higher at 209p.