Petroceltic International has made a number of changes to the board of its company.
Neeve Billis has been appointed as senior independent director and has joined the audit, nominations and remunerations committee.
Meanwhile Nicholas Gray has been made chairman of the audit committee and has also joined the nominations committee.
Robert Adair, chairman of Petroceltic, said: “I am delighted to confirm the appointment of Neeve Billis as Senior Independent Director and Nicholas Gay as Chairman of the Audit Committee and to welcome Tom Hickey back to the Board as an Executive Director.
“I have worked with David Thomas for over 8 years at both Melrose Resources and Petroceltic and I would like to sincerely thank him for his hugely significant contribution to our business over this time.
“He leaves with our very best wishes for the future.”
Chief financial officer Tom Hickey has also been re-appointed to the board of the company with immediate effect.
He previously served on the board from December 2010 to July 2014.
Petroceltic also announced its chief operating officer David Thomas will leave the company for personal reasons and is expected to depart from the business next month.
Last month shareholders of the company voted against the removal of its chief executive Brian O’Cathain at an extraordinary general meeting.
Other candidates put forward by its largest shareholder Worldview Capital Management were rejected.