diff --git a/types/passport-client-cert/index.d.ts b/types/passport-client-cert/index.d.ts
new file mode 100644
index 0000000000..5bb80c5027
--- /dev/null
+++ b/types/passport-client-cert/index.d.ts
@@ -0,0 +1,35 @@
+// Type definitions for passport-jwt 2.0
+// Project: https://github.com/ripjar/passport-client-cert
+// Definitions by: Sean Warner <https://github.com/warnersean/>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
+
+import {Strategy as PassportStrategy} from 'passport-strategy';
+import {Request} from 'express';
+
+export class Strategy extends PassportStrategy {
+    constructor(verify: PkiCallback);
+    constructor(opt: StrategyOptions, verify: PkiCallback | PkiCallbackWithRequest);
+}
+
+export interface StrategyOptions {
+    passReqToCallback?: boolean;
+}
+
+export type PkiCallback = (payload: ClientCert, done: PkiVerifiedCallback) => void;
+
+export type PkiCallbackWithRequest = (req: Request, payload: ClientCert, done: PkiVerifiedCallback) => void;
+
+export interface ClientCert {
+    exponent: string;
+    fingerprint: string;
+    issuer: any;
+    modulus: string;
+    raw: Uint8Array;
+    serialNumber: string;
+    subject: any;
+    valid_from: string;
+    valid_to: string;
+}
+
+export type PkiVerifiedCallback = (error: any, user?: any, info?: any) => void;
diff --git a/types/passport-client-cert/passport-client-cert-tests.ts b/types/passport-client-cert/passport-client-cert-tests.ts
new file mode 100644
index 0000000000..256d2ddcd6
--- /dev/null
+++ b/types/passport-client-cert/passport-client-cert-tests.ts
@@ -0,0 +1,14 @@
+import * as passport from "passport";
+import {ClientCert, PkiVerifiedCallback, Strategy as ClientCertStrategy} from "passport-client-cert";
+
+passport.use(new ClientCertStrategy( (clientCert: ClientCert, done: PkiVerifiedCallback) => {
+    let cn = clientCert.subject.cn;
+    let user = null;
+
+    // The CN will typically be checked against a database
+    if (cn === 'test-cn') {
+        user = { name: 'Test User' };
+    }
+
+    done(null, user);
+}));
diff --git a/types/passport-client-cert/tsconfig.json b/types/passport-client-cert/tsconfig.json
new file mode 100644
index 0000000000..614afd9842
--- /dev/null
+++ b/types/passport-client-cert/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "passport-client-cert-tests.ts"
+    ]
+}
diff --git a/types/passport-client-cert/tslint.json b/types/passport-client-cert/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/passport-client-cert/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }