This achievement is unlocked by hitting the maximum rank in any of the 3 teams(Arboreal,Kinetic,Enemy) by completing daily sponsor objectives. The maximum rank requires you to complete a total of 48 objectives, meaning this will take a minimum of 16 days to do from scratch if you do all 3 every day.
Completed objectives are refreshed daily at 00:00 GMT, incomplete objectives will persist until you either complete them or change them(you can do this for one objective, once per day) The objectives get more difficult the further in you get and you will sometimes get some specific to your teams 'style' e.g. trick based for Enemy.
For people that already completed this pre-achievements: