Skip to content
Please check an answer for every question.
Cookie settings

Total may deposit the following categories of cookies: Cookies for statistics, targeted advertising and social networks. You have the possibility to disable these cookies, these settings will only be valid on the browser you are currently using.

Enabling this cookie category allows us to establish statistics of traffic on the site. Disabling them prevents us from monitoring and improving the quality of our services.
Our website may contain sharing buttons to social networks that allow you to share our content on these social networks. When you use these sharing buttons, a link is made to the servers of these social networks and a third-party cookie is installed after obtaining your consent.
Enabling this cookie category would allow our partners to display more relevant ads based on your browsing and customer profile. This choice has no impact on the volume of advertising.

Kaj Riska


Kaj Riska - Senior ice engineer

Kaj Riska graduated from the Helsinki University of Technology in Naval Architecture. He worked at the Technical Research Centre of Finland from 1976 to 1988 as head of Arctic Marine Technology and then joined the Academy of Finland as a senior researcher.

From 1991 to 1996 he was the director of the Arctic Offshore Research Centre and then professor at Helsinki University of Technology before becoming head of ILS OY, in Helsinki, in 2005.

He joined Total Exploration & Production in 2012 as Senior Ice Engineer. He is an expert in the design of carriers for the Yamal LNG project on Arctic routes.

Kaj took part in the design of several ice-breakers (IB Varandey and Toboy) and of a frost-resistant FPSU in the bay of Bohai. He won the Total Exploration & Production prize for innovation in 2014.

View Kaj's profile on LinkedIn.



  • Since August 2015, Kaj has been head of extreme cold within Exploration & Production’s R&D technological innovation platform.



  • He has contributed to many publications on the subject of boats and offshore structures operating in ice and some 50 of his articles are reference works for the scientific press.

Liquefied Natural Gas

Yamal: Designing an LNG Ice-Breaker Ship