You had a team job to do, so you put a great squad together and proved you're a leader.
This achievement is directly tied to the main storyline of Call of Pripyat. It requires the player to recruit every possible squadmate for the Pripyat 1 mission. These are:
- Zulu - Joins the team by default
- Vano - Can be recruited after completing the Debts side quest and giving him 5000 RU
- Sokolov - Can be recruited by completing the Anomalous Plant side quest for Professor Ozersky
- Strider - Can be recruited by completing the Monolith survivors side quest for either Duty or Freedom
The player will obtain the achievement as soon as the fourth squadmate is hired. Do note that recruiting Strider is possible after obtaining the A Man of Balance achievement, but the sequence of quests to be completed to do so is a lot more elaborate and involves obtaining the Diplomat Achievement.
Every squadmate's damage resistance is significantly increased during the trip within the Jupiter Underground, making it easier to go through the storyline with them alive.