If there's anything that aids a team's quest for performance across a Formula 1 season it's continuity; being able to draw upon the same experienced skillset, the sort of deep store of knowledge that quickens the pace of development and leads to real gains.
And there's no better source of experience and continuity than our test and reserve driver Sébastien Buemi, for whom 2018 will represent an eighth year as a member of the Red Bull Racing driver roster.
A product of the Red Bull Junior Team, Sébastien's first stint as our test driver came in 2008, a year in which he also raced in GP2, where he finished as runner-up in the Asia series. He also finished sixth overall in the main series, scoring sprint race wins in France and Hungary.
The lessons learned earned him a Formula One drive with Scuderia Toro Rosso for 2009 and at the season-opener in Australia he became the first Swiss driver to contest a grand prix since Jean-Denis Délétraz at the 1995 European Grand Prix.
Sébastien's time at Toro Rosso came to an end at the close of the 2011 season, but with 55 grands prix under his belt and a wealth of F1 experience at his disposal, the decision to bring him to Red Bull Racing in a test and reserve capacity for 2012 was straightforward.
In the years since, Sébastien has enjoyed a hugely successful parallel career in other categories. He made his World Endurance Championship debut with Toyota at the 2012 Le Mans 24-Hour race and in 2014 he and No 8 car team-mate Anthony Davidson won the World Endurance Championship title with the Japanese marque. Last year, driving with Davidson and Japanese former F1 racer Kazuki Nakajima, Séb was again a championship runner-up.
Alongside his efforts in endurance racing, Sébastien has enjoyed a hugely successful career in the Formula E electric racing series. He finished as championship runner-up in his debut season in 2014-'15 and the following year took a memorable championship win at the final round in 2015-'16. He was again runner-up in 2016-'17, only losing out in another thrilling final-round decider.
Sébastien will again race in Formula E and the WEC this year, but alongside those duties he will continue to be a highly valued member of the Red Bull Racing team, where he'll once again help drive the Team forward in 2018.