diff --git a/types/jwk-to-pem/index.d.ts b/types/jwk-to-pem/index.d.ts
new file mode 100644
index 0000000000..f8c60791dc
--- /dev/null
+++ b/types/jwk-to-pem/index.d.ts
@@ -0,0 +1,43 @@
+// Type definitions for jwk-to-pem 2.0
+// Project: https://github.com/Brightspace/node-jwk-to-pem#readme
+// Definitions by: Erik Silkensen <https://github.com/esilkensen>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export = jwkToBuffer;
+
+declare function jwkToBuffer(jwk: jwkToBuffer.JWK, opts?: jwkToBuffer.Options): string;
+
+declare namespace jwkToBuffer {
+    interface Options {
+        private: boolean;
+    }
+
+    interface EC {
+        kty: "EC";
+        crv: string;
+        x: string;
+        y: string;
+    }
+
+    interface ECPrivate {
+        kty: "EC";
+        crv: string;
+        d: string;
+        x?: string;
+        y?: string;
+    }
+
+    interface RSA {
+        kty: "RSA";
+        e: string;
+        n: string;
+        d?: string;
+        p?: string;
+        q?: string;
+        dp?: string;
+        dq?: string;
+        qi?: string;
+    }
+
+    type JWK = EC | ECPrivate | RSA;
+}
diff --git a/types/jwk-to-pem/jwk-to-pem-tests.ts b/types/jwk-to-pem/jwk-to-pem-tests.ts
new file mode 100644
index 0000000000..2098d4b89f
--- /dev/null
+++ b/types/jwk-to-pem/jwk-to-pem-tests.ts
@@ -0,0 +1,68 @@
+import jwkToPem = require('jwk-to-pem');
+
+const jwk: jwkToPem.JWK = { kty: 'EC', crv: 'P-256', x: '...', y: '...' };
+jwkToPem(jwk); // $ExpectType string
+
+jwkToPem('hi'); // $ExpectError
+jwkToPem(null); // $ExpectError
+jwkToPem({ kty: {} }); // $ExpectError
+jwkToPem({ kty: 'foozleberries' }); // $ExpectError
+
+const ec1: jwkToPem.JWK = {
+    crv: 'P-256',
+    kty: 'EC',
+    x: 'gh9MmXjtmcHFesofqWZ6iuxSdAYgoPVvfJqpv1818lo',
+    y: '3BDZHsNvKUb5VbyGPqcAFf4FGuPhJ2Xy215oWDw_1jc',
+};
+jwkToPem(ec1); // $ExpectType string
+
+const ec2: jwkToPem.JWK = {
+    kty: 'EC',
+    crv: 'P-256',
+    d: '870MB6gfuTJ4HtUnUvYMyJpr5eUZNP4Bk43bVdj3eAE',
+};
+jwkToPem(ec2); // $ExpectType string
+jwkToPem(ec2, { private: true }); // $ExpectType string
+jwkToPem(ec2, {}); // $ExpectError
+jwkToPem(ec2, { foo: 'bar' }); // $ExpectError
+jwkToPem(ec2, 'foo'); // $ExpectError
+
+const ec5: jwkToPem.JWK = {
+    crv: 'P-384',
+    kty: 'EC',
+    x: 'QIRvRhN2MpnTQ4teO4Y_RYFaK2Qlvc2lbhC0vALwrFOy33kUihkNUvHiTaUsp2W3',
+    y: 'vSA1sCKKzT4UOavStUL2WpwcCflEyDshzy3dc1IZtACUngU2xMDDMsi0gDL9jLiU',
+};
+jwkToPem(ec5); // $ExpectType string
+
+jwkToPem({ kty: 'EC', x: 'foo', y: 'bar' }); // $ExpectError
+jwkToPem({ kty: 'EC', crv: {}, x: 'foo', y: 'bar' }); // $ExpectError
+jwkToPem({ kty: 'EC', crv: 'P-256', y: 'bar' }); // $ExpectError
+jwkToPem({ kty: 'EC', crv: 'P-256', x: {}, y: 'bar' }); // $ExpectError
+jwkToPem({ kty: 'EC', crv: 'P-256', x: 'foo' }); // $ExpectError
+jwkToPem({ kty: 'EC', crv: 'P-256', x: 'foo', y: {} }); // $ExpectError
+
+const rsa1: jwkToPem.JWK = {
+    kty: 'RSA',
+    n: '...',
+    e: 'AQAB',
+};
+jwkToPem(rsa1); // $ExpectType string
+
+const rsa2: jwkToPem.JWK = {
+    kty: 'RSA',
+    n: '...',
+    e: 'AQAB',
+    d: '...',
+    p: '...',
+    q: '...',
+    dp: '...',
+    dq: '...',
+    qi: '...',
+};
+jwkToPem(rsa2); // $ExpectType string
+
+jwkToPem({ kty: 'RSA', e: 'AQAB' }); // $ExpectError
+jwkToPem({ kty: 'RSA', n: {}, e: 'AQAB' }); // $ExpectError
+jwkToPem({ kty: 'RSA', n: 'foo' }); // $ExpectError
+jwkToPem({ kty: 'RSA', n: 'foo', e: {} }); // $ExpectError
diff --git a/types/jwk-to-pem/tsconfig.json b/types/jwk-to-pem/tsconfig.json
new file mode 100644
index 0000000000..6975ea4f39
--- /dev/null
+++ b/types/jwk-to-pem/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "jwk-to-pem-tests.ts"
+    ]
+}
diff --git a/types/jwk-to-pem/tslint.json b/types/jwk-to-pem/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/jwk-to-pem/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }