Jane Gallagher probably did not know it at the time, but she picked an opportune moment to resign from Cogs & Marvel, the international events business whose clients include Google, Twitter and Facebook. Gallagher had co-founded the Dublin-based business with Róisín Callaghan in 2006. Initially it traded as Green Light Events, but it was rebranded in 2018 as part of a major international expansion that saw the company open an outpost in San Francisco to service its roster of Silicon Valley clients. The company has profited heavily from organising major events, parties, and conferences for blue chip clients. In 2019,…