diff --git a/extensions/mssql/src/contracts.ts b/extensions/mssql/src/contracts.ts
index e4e09425c030..7c03fbfa9cf9 100644
--- a/extensions/mssql/src/contracts.ts
+++ b/extensions/mssql/src/contracts.ts
@@ -528,3 +528,26 @@ export namespace SerializeDataContinueRequest {
 	export const type = new RequestType<azdata.SerializeDataContinueRequestParams, azdata.SerializeDataResult, void, void>('serialize/continue');
 }
 // ------------------------------- <Serialization> -----------------------------
+
+// ------------------------------- < Load Completion Extension Request > ------------------------------------
+/**
+ * Completion extension load parameters
+ */
+export class CompletionExtensionParams {
+	/// <summary>
+	/// Absolute path for the assembly containing the completion extension
+	/// </summary>
+	public assemblyPath: string;
+	/// <summary>
+	/// The type name for the completion extension
+	/// </summary>
+	public typeName: string;
+	/// <summary>
+	/// Property bag for initializing the completion extension
+	/// </summary>
+	public properties: {};
+}
+
+export namespace CompletionExtLoadRequest {
+	export const type = new RequestType<CompletionExtensionParams, boolean, void, void>('completion/extLoad');
+}
diff --git a/extensions/mssql/src/sqlToolsServer.ts b/extensions/mssql/src/sqlToolsServer.ts
index 16566fc49647..b877bc94b16b 100644
--- a/extensions/mssql/src/sqlToolsServer.ts
+++ b/extensions/mssql/src/sqlToolsServer.ts
@@ -19,6 +19,7 @@ import { SchemaCompareService } from './schemaCompare/schemaCompareService';
 import { AppContext } from './appContext';
 import { DacFxService } from './dacfx/dacFxService';
 import { CmsService } from './cms/cmsService';
+import { CompletionExtensionParams, CompletionExtLoadRequest } from './contracts';
 
 const baseConfig = require('./config.json');
 
@@ -46,6 +47,9 @@ export class SqlToolsServer {
 				setTimeout(() => {
 					statusView.hide();
 				}, 1500);
+				vscode.commands.registerCommand('mssql.loadCompletionExtension', (params: CompletionExtensionParams) => {
+					this.client.sendRequest(CompletionExtLoadRequest.type, params);
+				});
 				Telemetry.sendTelemetryEvent('startup/LanguageClientStarted', {
 					installationTime: String(installationComplete - installationStart),
 					processStartupTime: String(processEnd - processStart),