Popularity s.r.l., which has since 1998 specialised in the development of search-engine strategies and earned a solid reputation for its results-oriented approach to the SEM field.

Additionally, Cesarino is a founding partner and CEO of DAUP s.r.l., a consultancy specialising in Web marketing.

He was a key promoter of USER, an observatory established for the purpose of studying the approach to search engines among Italy's population of Internet users.

In 2003 he was head of the Web Marketing Division of Io s.r.l, a communications company.

He has written numerous articles on Web marketing and search engines for publication by the portal Il Sole 24 Ore and others devoted to that aspect of IT.

He has been a speaker for ADICO and Hops Libri, bringing his expertise in the theme of search engines and Web marketing to some of the industry's most important seminars and conventions.

From 1990 to 1999 he was Director of IT Systems at VIR S.p.A., where he helped in the process of computerising the production and management processes. In 1991 he became the company's youngest director.

Between 1985 and 1990 he was a senior consultant for the SOGES S.p.A. group, handling a wide variety of projects in corporate organisation for companies.