To obtain this achievement you need to win a game using an Recon legend. Recon legends are denoted with a radar logo. Currently, the recon legends are Bloodhound, Crypto, Pathfinder and Valkyrie.
My best advice for winning games would be to find a relatively quiet spot to land with your team and loot up before fighting. Besides that, teamwork is essential. Stick with your squadmates and support them when needed.
Update for season 9: winning in the new Arena mode with a recon character counts.