He is the head of the Department of New Media and Communications Theory Studies in the School of Journalism at the Moscow State University, founder and publisher of Chastny Korrespondent, an online newspaper.

In 1997, he briefly left professional journalism to serve as an advisor to Boris Nemtsov, the first Deputy Chairman of the Government of the Russian Federation.

From 2001 to 2005, Zassoursky worked as deputy general-director of public relations and marketing at Rambler, owner of one of Russia's biggest web portals at the time, and, subsequently, he prepared the company's research papers as director of special projects.

The full title of the report was “Climate change as a political and economic challenge: a unique opportunity for the Russian Federation to technologically transform and respect the environmental rights of its citizens”.

Zassoursky was in charge of internet promotion campaign of the fim, bringing in media support from Rambler, Yandex, Facebook and LiveJournal for its release.

In 2016 it became known that Zassoursky is a producer on a new film based on Pelevin's novel Empire V. In June 2018 an ICO campaign has been announced with the goal to help fund the shooting and post-production.

In October 2008, Zassoursky founded Chastny Korrespondent, a Russian web publication, the first to operate under a creative commons license in Russia.

One of the main goals of this was the desire to help Russian Wikipedia, and to give talented writers the opportunity to showcase their abilities as citizen journalists.

Nauchny Korrespondent also helps students and their potential employers connect and form pre-recruitment relationships, as well as coordinating research endeavours with industry demands.

All of the preserved documents and their metadata are persisted in the Noosphere register at Noosphere.ru that contains information on over a million entries that consist of public domain, open licensed and some orphan works.

The nation-based system strives to archive multimedia works and build up international cooperation to avoid copyright privatisation and disappearances of public domain and open licensed content.