Diane Schueneman has been appointed as a non-executive director of Barclays, the banking giant said on Thursday.Schueneman, who has spent 37 years at Merrill Lynch covering a number of roles, including that of senior vice president and head of global infrastructure solutions, is currently a non-executive director of ICAP."Her insights into the power of technology and operational efficiency together with her experience in the financial services industry, including in the US, make her a very welcome addition to the Barclays board," said group chairman John McFarlane.Barclays shares were up 0.44% to 275.65p at 10:25 on Thursday.