Duty
∙ Discount from Duty-sympathizing Yanov technician ("Nitro", Undocumented)
∙ Ability to purchase PSZ-9d Duty Suit, Groza from Hawaiian
∙ PSZ-9d Duty Suit
∙ Entire Duty Warehouse Cache (Including PSZ-9d Duty Suit, Groza)
Freedom
∙ Discount from Freedom-sympathizing Yanov Trader ("Hawaiian", Undocumented)
∙ Ability to purchase Wind of Freedom Suit, SVD, from Hawaiian
∙ Wind of Freedom Suit
∙ Entire Duty Warehouse Cache (Including PSZ-9d Duty Suit, Groza)
For the sake of this guide, I will choose Freedom - the rewards are slightly better, in my opinion, as it allows you to receive both suits. Once you have handed off the PDA, you will need to go to the Duty cache and kill the side that you didn't give the PDA to - if you gave it to Freedom, kill Duty; if you gave it to Duty, kill Freedom. The faction you sided with will now trust you and be friendly to you, and you will receive membership.
Recruiting the Squad
You must now go meet the Monolith Squad. They can be found just North of the Container Warehouse, to the most South-Western end of Yanov (See the map screenshot to the left.) Once there, speak with Strider. He will inform you of the squad's situation. Return to your faction leader, and inform him of the squad. With some convincing, he will send a couple of recruiters to them with you. The recruiters will describe their faction, and the Monolith will accept.
Once the squad returns to Yanov Station with you and the recruiters, they will become regular members of their faction, Friendly, and will wander the Zone with their comrades. Strider will not, however. As of now, your mission is complete, and you may continue playing the game until the time comes for your expedition.
Strider
When the time comes to recruit people for your mission to Pripyat, you can go to Strider and ask him to come with you. He will very eagerly agree, wishing to travel to Pripyat in an effort to free other Monolith members from their brainwashing.
Strider's Expedition Gear, Role
∙ Modified SVU Sniper Rifle
∙ Monolith Suit, SEVA Helmet
∙ Super effective against Stalkers.
∙ Weak against Mutants.
Strider is a particularly diffulct squadmate to hire, but he's in interesting character, and one that is easily overlooked or missed. I hope you enjoy his assistance in your playthrough! Best of luck. Please assess!