diff --git a/.changeset/rush-ws-2024-0-29-16-13-31.md b/.changeset/rush-ws-2024-0-29-16-13-31.md
new file mode 100644
index 00000000..3eed2b65
--- /dev/null
+++ b/.changeset/rush-ws-2024-0-29-16-13-31.md
@@ -0,0 +1,5 @@
+---
+"@chronus/chronus": patch
+---
+
+Add support for rush.js
diff --git a/packages/chronus/src/workspace-manager/index.ts b/packages/chronus/src/workspace-manager/index.ts
index 2df830d0..2318b620 100644
--- a/packages/chronus/src/workspace-manager/index.ts
+++ b/packages/chronus/src/workspace-manager/index.ts
@@ -1,2 +1,3 @@
 export * from "./npm.js";
-export * from "./pnpm.js";
+export { createPnpmWorkspaceManager } from "./pnpm.js";
+export { createRushWorkspaceManager } from "./rush.js";
diff --git a/packages/chronus/src/workspace-manager/pnpm.ts b/packages/chronus/src/workspace-manager/pnpm.ts
index 06131bc8..66e09f4b 100644
--- a/packages/chronus/src/workspace-manager/pnpm.ts
+++ b/packages/chronus/src/workspace-manager/pnpm.ts
@@ -1,14 +1,7 @@
 import { load } from "js-yaml";
-import {
-  ChronusError,
-  isDefined,
-  isPathAccessible,
-  joinPaths,
-  lookup,
-  resolvePath,
-  type ChronusHost,
-} from "../utils/index.js";
+import { ChronusError, isPathAccessible, joinPaths, lookup, type ChronusHost } from "../utils/index.js";
 import type { Package, Workspace, WorkspaceManager } from "./types.js";
+import { findPackagesFromPattern } from "./utils.js";
 
 const workspaceFileName = "pnpm-workspace.yaml";
 interface PnpmWorkspaceConfig {
@@ -23,7 +16,7 @@ export function createPnpmWorkspaceManager(host: ChronusHost): WorkspaceManager
         return isPathAccessible(host, path);
       });
       if (root === undefined) {
-        throw new Error(`Cannot find pnpm-workspace.yaml in a parent folder to ${dir}`);
+        throw new ChronusError(`Cannot find ${workspaceFileName} in a parent folder to ${dir}`);
       }
       const workspaceFilePath = joinPaths(root, workspaceFileName);
 
@@ -31,10 +24,10 @@ export function createPnpmWorkspaceManager(host: ChronusHost): WorkspaceManager
       const config: PnpmWorkspaceConfig = load(file.content) as any;
 
       if (config.packages === undefined) {
-        throw new ChronusError("packages entry missing in pnpm-workspace.yaml");
+        throw new ChronusError(`packages entry missing in ${workspaceFileName}`);
       }
       if (Array.isArray(config.packages) === false) {
-        throw new ChronusError("packages is not an array in pnpm-workspace.yaml");
+        throw new ChronusError(`packages is not an array in ${workspaceFileName}`);
       }
       const packages: Package[] = (
         await Promise.all(config.packages.map((pattern) => findPackagesFromPattern(host, root, pattern)))
@@ -46,29 +39,3 @@ export function createPnpmWorkspaceManager(host: ChronusHost): WorkspaceManager
     },
   };
 }
-
-export async function findPackagesFromPattern(host: ChronusHost, root: string, pattern: string): Promise<Package[]> {
-  const packageRoots = await host.glob(pattern, {
-    baseDir: root,
-    onlyDirectories: true,
-  });
-
-  const packages = await Promise.all(packageRoots.map((x) => tryLoadNodePackage(host, root, x)));
-  return packages.filter(isDefined);
-}
-
-async function tryLoadNodePackage(host: ChronusHost, root: string, relativePath: string): Promise<Package | undefined> {
-  const pkgJsonPath = resolvePath(root, relativePath, "package.json");
-  if (await isPathAccessible(host, pkgJsonPath)) {
-    const file = await host.readFile(pkgJsonPath);
-    const pkgJson = JSON.parse(file.content);
-    return {
-      name: pkgJson.name,
-      version: pkgJson.version,
-      relativePath: relativePath,
-      manifest: pkgJson,
-    };
-  } else {
-    return undefined;
-  }
-}
diff --git a/packages/chronus/src/workspace-manager/rush.test.ts b/packages/chronus/src/workspace-manager/rush.test.ts
new file mode 100644
index 00000000..7dd8861d
--- /dev/null
+++ b/packages/chronus/src/workspace-manager/rush.test.ts
@@ -0,0 +1,62 @@
+import { dump } from "js-yaml";
+import { beforeEach, describe, expect, it } from "vitest";
+import { createTestHost, type TestHost } from "../testing/test-host.js";
+import { createRushWorkspaceManager } from "./rush.js";
+import type { WorkspaceManager } from "./types.js";
+
+describe("rush", () => {
+  let host: TestHost;
+  let rush: WorkspaceManager;
+  beforeEach(async () => {
+    host = createTestHost({});
+
+    rush = createRushWorkspaceManager(host.host);
+  });
+
+  it("finds 0 packages when workspace has none", async () => {
+    host.addFile(
+      "proj/rush.json",
+      dump({
+        projects: [],
+      }),
+    );
+    const workspace = await rush.load("proj");
+    expect(workspace.packages).toEqual([]);
+  });
+
+  it("finds all packages", async () => {
+    host.addFile(
+      "proj/rush.json",
+      dump({
+        projects: [
+          {
+            packageName: "pkg-a",
+            projectFolder: "packages/pkg-a",
+            shouldPublish: true,
+          },
+          {
+            packageName: "pkg-b",
+            projectFolder: "packages/pkg-b",
+            shouldPublish: true,
+          },
+        ],
+      }),
+    );
+    host.addFile("proj/packages/pkg-a/package.json", JSON.stringify({ name: "pkg-a", version: "1.0.0" }));
+    host.addFile("proj/packages/pkg-b/package.json", JSON.stringify({ name: "pkg-b", version: "1.2.0" }));
+    const workspace = await rush.load("proj");
+    expect(workspace.packages).toHaveLength(2);
+    expect(workspace.packages[0]).toEqual({
+      name: "pkg-a",
+      version: "1.0.0",
+      relativePath: "packages/pkg-a",
+      manifest: { name: "pkg-a", version: "1.0.0" },
+    });
+    expect(workspace.packages[1]).toEqual({
+      name: "pkg-b",
+      version: "1.2.0",
+      relativePath: "packages/pkg-b",
+      manifest: { name: "pkg-b", version: "1.2.0" },
+    });
+  });
+});
diff --git a/packages/chronus/src/workspace-manager/rush.ts b/packages/chronus/src/workspace-manager/rush.ts
new file mode 100644
index 00000000..3b4d474f
--- /dev/null
+++ b/packages/chronus/src/workspace-manager/rush.ts
@@ -0,0 +1,48 @@
+import { load } from "js-yaml";
+import { ChronusError, isDefined, isPathAccessible, joinPaths, lookup, type ChronusHost } from "../utils/index.js";
+import type { Package, Workspace, WorkspaceManager } from "./types.js";
+import { tryLoadNodePackage } from "./utils.js";
+
+const workspaceFileName = "rush.json";
+
+interface RushJson {
+  readonly projects: RushProject[];
+}
+
+interface RushProject {
+  readonly packageName: string;
+  readonly projectFolder: string;
+  readonly shouldPublish?: boolean;
+}
+
+export function createRushWorkspaceManager(host: ChronusHost): WorkspaceManager {
+  return {
+    async load(dir: string): Promise<Workspace> {
+      const root = await lookup(dir, (current) => {
+        const path = joinPaths(current, workspaceFileName);
+        return isPathAccessible(host, path);
+      });
+      if (root === undefined) {
+        throw new ChronusError(`Cannot find ${workspaceFileName} in a parent folder to ${dir}`);
+      }
+      const workspaceFilePath = joinPaths(root, workspaceFileName);
+
+      const file = await host.readFile(workspaceFilePath);
+      const config: RushJson = load(file.content) as any;
+
+      if (config.projects === undefined) {
+        throw new ChronusError(`projects entry missing in ${workspaceFileName}`);
+      }
+      if (Array.isArray(config.projects) === false) {
+        throw new ChronusError(`projects is not an array in ${workspaceFileName}`);
+      }
+      const packages: Package[] = (
+        await Promise.all(config.projects.map((pattern) => tryLoadNodePackage(host, root, pattern.projectFolder)))
+      ).filter(isDefined);
+      return {
+        path: root,
+        packages,
+      };
+    },
+  };
+}
diff --git a/packages/chronus/src/workspace-manager/utils.ts b/packages/chronus/src/workspace-manager/utils.ts
new file mode 100644
index 00000000..c6f37444
--- /dev/null
+++ b/packages/chronus/src/workspace-manager/utils.ts
@@ -0,0 +1,34 @@
+import { isPathAccessible } from "../utils/fs-utils.js";
+import type { ChronusHost } from "../utils/host.js";
+import { isDefined, resolvePath } from "../utils/index.js";
+import type { Package } from "./types.js";
+
+export async function findPackagesFromPattern(host: ChronusHost, root: string, pattern: string): Promise<Package[]> {
+  const packageRoots = await host.glob(pattern, {
+    baseDir: root,
+    onlyDirectories: true,
+  });
+
+  const packages = await Promise.all(packageRoots.map((x) => tryLoadNodePackage(host, root, x)));
+  return packages.filter(isDefined);
+}
+
+export async function tryLoadNodePackage(
+  host: ChronusHost,
+  root: string,
+  relativePath: string,
+): Promise<Package | undefined> {
+  const pkgJsonPath = resolvePath(root, relativePath, "package.json");
+  if (await isPathAccessible(host, pkgJsonPath)) {
+    const file = await host.readFile(pkgJsonPath);
+    const pkgJson = JSON.parse(file.content);
+    return {
+      name: pkgJson.name,
+      version: pkgJson.version,
+      relativePath: relativePath,
+      manifest: pkgJson,
+    };
+  } else {
+    return undefined;
+  }
+}