Research notes
Naoki Tokunaga is a Japanese racing engineer who began his career in Nissan's racing programs, before moving into Benetton/Renault F1, where he held roles as Vehicle Dynamics Engineer and Head of Systems Control, working on KERS and electronics/control systems, and later held senior technical management positions at power unit organizations such as Renault Sport F1. PlanetF1's Cadillac key personnel article lists him as Cadillac F1's Senior Strategic Advisor.
His current Cadillac role is confirmed mainly by PlanetF1's key personnel article and public career records, so it is included at medium confidence;
his historical systems-control background places him in the systems-controls slot.