diff --git a/src/interactions/leaderAdd.js b/src/interactions/leaderAdd.js
index 430f8dc4..685750ec 100644
--- a/src/interactions/leaderAdd.js
+++ b/src/interactions/leaderAdd.js
@@ -1,4 +1,4 @@
-import { getInfoForUser, airCreate } from '../utils'
+import { getInfoForUser, airCreate, airPatch } from '../utils'
 
 const interactionLeaderAdd = (bot, message) => {
   const { user, text } = message
@@ -23,6 +23,12 @@ const interactionLeaderAdd = (bot, message) => {
       return
     }
 
+    if (!commandUser.club.fields['Slack Channel ID'] != channel) {
+      console.log(`${commandUser.user} doesn't own this channel`)
+      bot.whisper(message, transcript('leaderAdd.invalidChannel'))
+      return
+    }
+
     const taggedUserID = message.text.match(/\<@(.*)\|/)[1]
     getInfoForUser(taggedUserID)
       .then(taggedUser => {
@@ -45,7 +51,19 @@ const interactionLeaderAdd = (bot, message) => {
       })
       .then(taggedUser => {
         // ensure we can assign the leader to this club
-        console.log('TODO: validate leader can be assigned to club')
+        console.log(taggedUser.leader)
+        const clubs = [
+          commandUser.club.id,
+          ...taggedUser.leader.fields['Clubs'],
+        ]
+        return airPatch('Leaders', taggedUser.leader.id, { Clubs: clubs }).then(
+          () => {
+            bot.whisper(
+              message,
+              transcript('leaderAdd.success', { taggedUserID, channel })
+            )
+          }
+        )
       })
       .catch(err => {
         console.error(err)
diff --git a/src/text.yml b/src/text.yml
index 9924175a..d190c663 100644
--- a/src/text.yml
+++ b/src/text.yml
@@ -88,5 +88,7 @@ meetingTime:
   success: Ok, I'll post a message in your club's channel around ${this.hour}:00 on ${this.day} UTC
   parsingError: I couldn't figure out what day and time you meant
 leaderAdd:
-  invalidUser: Only club leaders can use this command
-  invalidClub: I couldn't find a club channel owned by you
\ No newline at end of file
+  invalidUser: Only club leaders can use this command.
+  invalidClub: I couldn't find your club.
+  invalidChannel: This isn't your club channel. Please run this in a channel you lead.
+  success: And... done! I've added <@${this.taggedUserID}> to the club in <#${this.channel}>.
\ No newline at end of file