diff --git a/contracts/boundless/src/datatypes.rs b/contracts/boundless/src/datatypes.rs
index 43a0593..942c16d 100644
--- a/contracts/boundless/src/datatypes.rs
+++ b/contracts/boundless/src/datatypes.rs
@@ -181,6 +181,10 @@ pub enum BoundlessError {
     EscrowAlreadyLinked = 14,
     /// Escrow contract not found
     EscrowNotFound = 15,
+    /// Campaign not found
+    CampaignAlreadyCompleted = 16,
+    /// Operation not allowed in current campaign state
+    InvalidCampaignState = 17,
 }
 // Events
 #[contractevent]
@@ -202,3 +206,10 @@ pub struct CampaignStatusUpdated {
     pub status: Status,
     pub admin: Address,
 }
+
+#[contractevent]
+pub struct CampaignCompleted {
+    pub campaign_id: u64,
+    pub completed_by: Address,
+    pub completed_at: u64,
+}
diff --git a/contracts/boundless/src/helper.rs b/contracts/boundless/src/helper.rs
new file mode 100644
index 0000000..68656ce
--- /dev/null
+++ b/contracts/boundless/src/helper.rs
@@ -0,0 +1,24 @@
+use crate::datatypes::{BoundlessError, CampaignCompleted, DataKey};
+use soroban_sdk::{Env, Address};
+
+// Helper function to check platform admin
+pub fn is_platform_admin(env: &Env, address: &Address) -> Result<bool, BoundlessError> {
+    let admin: Address = env
+        .storage()
+        .persistent()
+        .get(&DataKey::Admin)
+        .ok_or(BoundlessError::Unauthorized)?;
+
+    Ok(&admin == address)
+}
+
+// Helper function to emit event
+pub fn emit_campaign_completed_event(env: &Env, campaign_id: u64, completed_by: Address) {
+    let event_data = CampaignCompleted {
+        campaign_id,
+        completed_by,
+        completed_at: env.ledger().timestamp(),
+    };
+
+    event_data.publish(env);
+}
diff --git a/contracts/boundless/src/lib.rs b/contracts/boundless/src/lib.rs
index 962352d..6dc1102 100644
--- a/contracts/boundless/src/lib.rs
+++ b/contracts/boundless/src/lib.rs
@@ -5,6 +5,7 @@ use soroban_sdk::contract;
 mod datatypes;
 mod interface;
 mod logic;
+mod helper;
 
 pub use logic::*;
 
diff --git a/contracts/boundless/src/logic/campaign.rs b/contracts/boundless/src/logic/campaign.rs
index 67b52c6..de8d6a2 100644
--- a/contracts/boundless/src/logic/campaign.rs
+++ b/contracts/boundless/src/logic/campaign.rs
@@ -1,7 +1,8 @@
 use crate::datatypes::{
     Backer, BoundlessError, Campaign, CampaignCancelled, CampaignFunded, CampaignStatusUpdated,
-    Milestone, Status,
+    Milestone, Status, DataKey
 };
+use crate::helper::{emit_campaign_completed_event, is_platform_admin};
 use crate::interface::{CampaignManagement, ContractManagement};
 use crate::{BoundlessContract, BoundlessContractArgs, BoundlessContractClient};
 use soroban_sdk::{contractimpl, Address, Env, Symbol, Vec};
@@ -80,12 +81,41 @@ impl CampaignManagement for BoundlessContract {
     }
 
     fn complete_campaign(env: Env, campaign_id: u64, admin: Address) -> Result<(), BoundlessError> {
-        // TODO: complete campaign logic
-        // - Verify admin authorization
-        // - Get campaign from storage
-        // - Update status to Completed
-        // - Store updated campaign
-        // - Emit completion event
+        // Verify admin authorization
+        admin.require_auth();
+
+        // Get campaign from storage
+        let mut campaign: Campaign = env
+            .storage()
+            .persistent()
+            .get(&DataKey::Campaign(campaign_id))
+            .ok_or(BoundlessError::CampaignNotFound)?;
+
+        // Check campaign status
+        match campaign.status {
+            Status::Completed => return Err(BoundlessError::CampaignAlreadyCompleted),
+            Status::Pending | Status::Active => {
+                // Proceed for active campaigns
+            },
+            _ => return Err(BoundlessError::InvalidCampaignState),
+        }
+
+        // Verify admin has permission
+        if campaign.owner != admin && !is_platform_admin(&env, &admin)? {
+            return Err(BoundlessError::Unauthorized);
+        }
+
+        // Update status to Completed
+        campaign.status = Status::Completed;
+
+        // Store updated campaign
+        env.storage()
+            .persistent()
+            .set(&DataKey::Campaign(campaign_id), &campaign);
+
+        // Emit completion event
+        emit_campaign_completed_event(&env, campaign_id, admin);
+
         Ok(())
     }