Having recently welcomed Jamie Ades from The QEII Conference Centre as a senior account manager, King joins the team from The O2, where she was responsible for driving content and identifying new opportunities.
Her role at Excel will include managing relationships with corporates and agencies, as well as sourcing new business.
Jane Hague, head of corporate account development, said: "I am delighted that we are attracting the best people in the business to come and join the team at ExCeL London. Our corporate business is growing rapidly, with recent clients including Adobe, Salesforce.com, Oracle, Cisco, PwC and BlackBerry. I’m sure that Samantha will make a fantastic addition to the team and I look forward to working with her at what is a very exciting time for Excel London and the ICC."