Details of the event have been released by its organisers, with the summit taking place on 18 February at 30 Euston Square in London.
The central theme of the event will be "Who is doing what, how and why?", covering the sustainability practices adopted by event planners in their live events.
Last year's event, which won a Gold at the 2013 C&IT Excellence Awards, attracted a high calibre of attendees and was supported by London Mayor Boris Johnson. More than 200 delegates attended, including from 40 client companies.
The Sustainable Events Summit was created through a partnership between agencies Smyle and Positive Impact, with support from variety of other businesses and industry bodies.
The 2014 event will be chaired by former CNN and BBC reporter Nadine Dereza.
Fiona Pelham, Positive Impact's managing director, said: "This is a unique opportunity to learn alongside global brands and be part of conversation for leadership in sustainability, which will include new initiatives such as the 'Share a Positive Impact' campaign."
The latter is aimed at encouraging businesses to share their "Positive Impact" on sustainability via a dedicated website. Content will include examples of sustainable events and an interactive map showing initiatives across the globe.
Rick Stainton, Smyle's managing director, added: "This award-winning event pioneers the way in sustainable thinking. Only by understanding the priorities of what global brands are thinking in this area will we truly be able to direct our own industry forwards."
Activity surrounding and during the event will use the hashtag #ses2014.