Genova can be reached by plane with direct flights from London, Paris, Munchen, Istanbul, Rome operated by official airlines; there are also several low-cost opportunities from different European and Italian destinations as well.
You may also consider to reach Rome, Milan or Pisa airports, and then reach Genova by train.
If you want to underline your marine related activity even approaching the conference venue, why not choose approaching the town by ship? There are several ferry opportunities from different Mediterranean harbours, and most Mediterranean cruising ships will stop in Liguria, either Genova or La Spezia or Savona.
If you want the thrill of driving in the roads of Italy, here are your directions to reach Genova by road. Indeed, coming with your own or with a rental car may be an excellent option if you plan to visit Liguria before or after the conference.