Ice will deliver a range of events as part of the contract including customer and staff events, exhibition design and build, environment design and branding.
The agency has worked with O2 for eight years and has delivered more than 1,500 events for the brand during this period.
John Worthington, head of events at O2, said: "Ice has been a key supplier of ours since 2009 and over that time we have built a special bond. The continuously high service level provided by Ice has been instrumental in its reappointment for another two years. It is vital that we move the business forward with a partner that understands our needs, contributes energy and a flow of strong original ideas, and delivers 100% on time and on budget. I look forward to continuing this great work with Ice."
More: Earlier this month, O2 unveiled giant blue rabbits in London as part of its new campaign.
This week O2 has also unveiled two new VR experiences for customers.
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