All Augment Triumphs in Destiny 2 work broadly the same way.
First, you need to purchase the Braytech Transponder item from Variks on Europa. This is on the second page of his inventory (use the D-Pad to switch pages) and requires 50 Herealways Pieces to purchase.
If you ve yet to do any of his Sabotage objectives, the sooner you begin the better - as each one introduces additional ways for these resources to drop when defeating enemies throughout Europa.
Once you have a Braytech Transponder, you ll be given a buff, the Braytech Signal, which will last seven days. Then, it s time to find a specific Fallen enemy, the Techno Squad Leader.