Brewer joins from Royal Hospital Chelsea where he was responsible for developing new business strategies and revenue streams.
His new role at Excel will include managing relationships with production companies and corporate accounts as well as sourcing new business for the venue.
Samantha Shamkh, head of conventions at Excel, said: "The success of the Olympic and Paralympic Games has created unprecedented interest in London as an event destination. We look forward to Harry joining the team – his skills and experience will be of huge benefit as we embark on what’s set to be our most successful year to date."
Excel won . During the Olympics it attracted more than 65,000 people to sports events on a single day, its highest-ever visitor figure.
The venue, package and product of the week can be found in