diff --git a/Content.Server/Antag/Components/AntagImmuneComponent.cs b/Content.Server/Antag/Components/AntagImmuneComponent.cs
new file mode 100644
index 0000000000..3ae8e049f6
--- /dev/null
+++ b/Content.Server/Antag/Components/AntagImmuneComponent.cs
@@ -0,0 +1,7 @@
+namespace Content.Server.Antag.Components;
+
+[RegisterComponent]
+public partial class AntagImmuneComponent : Component
+{
+
+}
diff --git a/Content.Server/Zombies/InitialInfectedExemptComponent.cs b/Content.Server/Zombies/InitialInfectedExemptComponent.cs
deleted file mode 100644
index f2dfda3f87..0000000000
--- a/Content.Server/Zombies/InitialInfectedExemptComponent.cs
+++ /dev/null
@@ -1,7 +0,0 @@
-namespace Content.Server.Zombies;
-
-[RegisterComponent]
-public sealed partial class InitialInfectedExemptComponent : Component
-{
-
-}
diff --git a/Resources/Locale/en-US/prototypes/roles/antags.ftl b/Resources/Locale/en-US/prototypes/roles/antags.ftl
index f0038b0eb9..ba43d4ff85 100644
--- a/Resources/Locale/en-US/prototypes/roles/antags.ftl
+++ b/Resources/Locale/en-US/prototypes/roles/antags.ftl
@@ -1,6 +1,9 @@
 roles-antag-syndicate-agent-name = Syndicate agent
 roles-antag-syndicate-agent-objective = Complete your objectives without being caught.
 
+roles-antag-syndicate-agent-sleeper-name = Syndicate sleeper agent
+roles-antag-syndicate-agent-sleeper-objective = A form of syndicate agent that can activate at any point in the middle of the shift.
+
 roles-antag-initial-infected-name = Initial Infected
 roles-antag-initial-infected-objective = Once you turn, infect as many other crew members as possible.
 
diff --git a/Resources/Prototypes/Entities/Mobs/Player/humanoid.yml b/Resources/Prototypes/Entities/Mobs/Player/humanoid.yml
index 3941dbcc9c..bd43d5d187 100644
--- a/Resources/Prototypes/Entities/Mobs/Player/humanoid.yml
+++ b/Resources/Prototypes/Entities/Mobs/Player/humanoid.yml
@@ -12,7 +12,7 @@
   parent: EventHumanoid
   components:
     - type: MindShield
-    - type: InitialInfectedExempt
+    - type: AntagImmune
 
 ## Death Squad
 
@@ -30,7 +30,6 @@
         - NamesLastMilitary
     - type: RandomHumanoidSpawner
       settings: DeathSquad
-    - type: InitialInfectedExempt
 
 - type: randomHumanoidSettings
   id: DeathSquad
@@ -66,7 +65,6 @@
       - NamesLastMilitary
     - type: RandomHumanoidSpawner
       settings: ERTLeader
-    - type: InitialInfectedExempt
 
 - type: randomHumanoidSettings
   id: ERTLeader
@@ -96,7 +94,6 @@
       state: ertleadereva
     - type: RandomHumanoidSpawner
       settings: ERTLeaderEVA
-    - type: InitialInfectedExempt
 
 - type: randomHumanoidSettings
   id: ERTLeaderEVA
@@ -117,7 +114,6 @@
   components:
     - type: RandomHumanoidSpawner
       settings: ERTLeaderEVALecter
-    - type: InitialInfectedExempt
 
 - type: randomHumanoidSettings
   id: ERTLeaderEVALecter
@@ -453,7 +449,6 @@
       state: cburn
     - type: RandomHumanoidSpawner
       settings: CBURNAgent
-    - type: InitialInfectedExempt
 
 - type: randomHumanoidSettings
   id: CBURNAgent
@@ -470,6 +465,7 @@
       nameSegments:
       - NamesFirstMilitary
       - NamesLastMilitary
+
 ## Central Command
 
 - type: entity
@@ -481,7 +477,6 @@
       state: centcom
     - type: RandomHumanoidSpawner
       settings: CentcomOfficial
-    - type: InitialInfectedExempt
 
 - type: randomHumanoidSettings
   id: CentcomOfficial
diff --git a/Resources/Prototypes/GameRules/events.yml b/Resources/Prototypes/GameRules/events.yml
index 34453db345..131704670e 100644
--- a/Resources/Prototypes/GameRules/events.yml
+++ b/Resources/Prototypes/GameRules/events.yml
@@ -431,7 +431,7 @@
       blacklist:
         components:
         - ZombieImmune
-        - InitialInfectedExempt
+        - AntagImmune
       briefing:
         text: zombie-patientzero-role-greeting
         color: Plum
@@ -485,7 +485,7 @@
 - type: entity
   noSpawn: true
   parent: BaseTraitorRule
-  id: SleeperAgentsRule
+  id: SleeperAgents
   components:
   - type: StationEvent
     earliestStart: 30
@@ -498,13 +498,17 @@
   - type: AlertLevelInterceptionRule
   - type: AntagSelection
     definitions:
-    - prefRoles: [ Traitor ]
+    - prefRoles: [ TraitorSleeper ]
+      fallbackRoles: [ Traitor ]
       min: 1
       max: 4 # DeltaV - Was 2 now 4
       playerRatio: 10
+      blacklist:
+        components:
+        - AntagImmune
       mindComponents:
       - type: TraitorRole
-        prototype: Traitor
+        prototype: TraitorSleeper
 
 - type: entity
   id: MassHallucinations
diff --git a/Resources/Prototypes/GameRules/roundstart.yml b/Resources/Prototypes/GameRules/roundstart.yml
index ee7b73008a..d7cc09e22e 100644
--- a/Resources/Prototypes/GameRules/roundstart.yml
+++ b/Resources/Prototypes/GameRules/roundstart.yml
@@ -181,6 +181,9 @@
     - prefRoles: [ Traitor ]
       max: 8
       playerRatio: 10
+      blacklist:
+        components:
+        - AntagImmune
       lateJoinAdditional: true
       mindComponents:
       - type: TraitorRole
@@ -244,7 +247,7 @@
       blacklist:
         components:
         - ZombieImmune
-        - InitialInfectedExempt
+        - AntagImmune
       briefing:
         text: zombie-patientzero-role-greeting
         color: Plum
diff --git a/Resources/Prototypes/Roles/Antags/traitor.yml b/Resources/Prototypes/Roles/Antags/traitor.yml
index 98fdb0ee47..67686203f5 100644
--- a/Resources/Prototypes/Roles/Antags/traitor.yml
+++ b/Resources/Prototypes/Roles/Antags/traitor.yml
@@ -7,3 +7,10 @@
   requirements:
   - !type:OverallPlaytimeRequirement # DeltaV - Playtime requirement
     time: 86400 # DeltaV - 24 hours
+
+- type: antag
+  id: TraitorSleeper
+  name: roles-antag-syndicate-agent-sleeper-name
+  antagonist: true
+  setPreference: true
+  objective: roles-antag-syndicate-agent-sleeper-objective