IOB | 31,920 followers on LinkedIn. IOB is a professional network of 32,100 members who work in banking and international financial services sector. IOB is a recognised college of University College Dublin (UCD) and is a centre of excellence in the provision of specialist education and lifelong learning to the financial services sector with programmes for members at every stage of their career. Over 6,000 people studied with us last year and we have the largest continuing professional development community in Ireland with over 25,200 registered members, committed to lifelong learning.