diff --git a/types/nssm/index.d.ts b/types/nssm/index.d.ts
new file mode 100644
index 0000000000..09ca82e6a0
--- /dev/null
+++ b/types/nssm/index.d.ts
@@ -0,0 +1,54 @@
+// Type definitions for nssm 0.1
+// Project: https://github.com/alykoshin/nssm
+// Definitions by: Joram van den Boezem <https://github.com/hongaar>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+type Command =
+    | 'install'
+    | 'remove'
+    | 'start'
+    | 'stop'
+    | 'restart'
+    | 'status'
+    | 'pause'
+    | 'continue'
+    | 'rotate'
+    | 'get'
+    | 'set'
+    | 'reset'
+
+type NssmThen<T> = <TResult1 = T, TResult2 = never>(
+    onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null,
+    onrejected?: ((reason: Error, stderr: string) => TResult2 | PromiseLike<TResult2>) | null | undefined
+) => NssmPromise<TResult1 | TResult2>
+
+type NssmCatch<T> = <TResult = never>(
+    onrejected?: ((reason: Error, stderr: string) => TResult | PromiseLike<TResult>) | null | undefined
+) => NssmPromise<T | TResult>
+
+interface NssmPromise<T> extends Promise<T> {
+    then: NssmThen<T>
+    catch: NssmCatch<T>
+}
+
+type CallbackFn = (error?: string, result?: string) => void
+type ZeroArgCommandFn = (callback: CallbackFn) => void
+type OneArgCommandFn = (arg1: string, callback: CallbackFn) => void
+type TwoArgCommandFn = (arg1: string, arg2: string, callback: CallbackFn) => void
+type PromiseCommandFn = (arg1?: string, arg2?: string) => NssmPromise<string>
+
+type NssmCommandFn =
+    & ZeroArgCommandFn
+    & OneArgCommandFn
+    & TwoArgCommandFn
+    & PromiseCommandFn
+
+export type Nssm = {
+    [key in Command]: NssmCommandFn
+}
+
+export interface NssmOptions {
+    nssmExe?: string
+}
+
+export default function nssm (serviceName: string, options?: NssmOptions): Nssm
diff --git a/types/nssm/nssm-tests.ts b/types/nssm/nssm-tests.ts
new file mode 100644
index 0000000000..73733d91b7
--- /dev/null
+++ b/types/nssm/nssm-tests.ts
@@ -0,0 +1,50 @@
+// https://github.com/alykoshin/nssm/blob/master/examples/promise_chain.js
+
+import nssm from 'nssm'
+
+const svcName = 'test';
+const options = { nssmExe: 'nssm.exe' };
+const testService = nssm(svcName, options);
+
+const propertyName = 'Start';
+
+let console: {
+    log: (...message: any[]) => void
+};
+
+testService.set('start', 'manual')
+  .then(function(stdout) {
+    console.log('\n*** Parameter set ok');
+    console.log('stdout: \'' + stdout + '\'');
+    return testService.get('start')
+  })
+  .then(function(stdout) {
+    console.log('\n*** Parameter retrieved ok');
+    console.log('stdout: \'' + stdout + '\'');
+    return testService.start()
+  })
+  .then(function(stdout) {
+    console.log('\n*** Service started ok');
+    console.log('stdout: \'' + stdout + '\'');
+    return testService.stop()
+  })
+  .then(function(stdout) {
+    console.log('\n*** Service stopped ok');
+    console.log('stdout: \'' + stdout + '\'');
+    console.log('DONE');
+  })
+  .catch(function(error) {
+    console.log('\n*** catch(): error:', error);
+    console.log('ERROR:', error);
+  })
+  ;
+
+// https://github.com/alykoshin/nssm/blob/master/examples/get_callback.js
+
+testService.get(propertyName, function(error, result) {
+    if (error) {
+        console.log('error:', error, ' stderr:', result);
+        return;
+    }
+    console.log('stdout: \'' + result + '\'');
+});
diff --git a/types/nssm/tsconfig.json b/types/nssm/tsconfig.json
new file mode 100644
index 0000000000..831eba6f50
--- /dev/null
+++ b/types/nssm/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",
+        "nssm-tests.ts"
+    ]
+}
diff --git a/types/nssm/tslint.json b/types/nssm/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/nssm/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }