diff --git a/src/engineering_platform/assets/dashboard.js b/src/engineering_platform/assets/dashboard.js
index 424b487d..cff34902 100644
--- a/src/engineering_platform/assets/dashboard.js
+++ b/src/engineering_platform/assets/dashboard.js
@@ -5845,6 +5845,12 @@ function initializeNoProjectSelectedBanner() {
     banner.hidden = true;
     try { localStorage.setItem(noProjectDismissalStorageKey, "true"); } catch {}
   });
+  $("dashboardProject")?.addEventListener("change", (event) => {
+    // Choosing the explicit global/no-project context is a fresh operator
+    // choice, rather than a continuation of a formerly dismissed notice.
+    if (event.currentTarget.value !== "") return;
+    try { localStorage.removeItem(noProjectDismissalStorageKey); } catch {}
+  });
 }
 initializeNoProjectSelectedBanner();
 applyDashboardLocale();
diff --git a/tests/engineering/dashboard.spec.mjs b/tests/engineering/dashboard.spec.mjs
index 797c1517..23987cf1 100644
--- a/tests/engineering/dashboard.spec.mjs
+++ b/tests/engineering/dashboard.spec.mjs
@@ -141,6 +141,19 @@ test("dismisses the no-project banner for the current browser", async ({ page })
   await expect(banner).toBeHidden();
 });
 
+test("shows the no-project banner again after explicitly choosing no project", async ({ page }) => {
+  const noProjectUrl = new URL(dashboardUrl);
+  noProjectUrl.search = "";
+  await page.goto(noProjectUrl.href, { waitUntil: "domcontentloaded" });
+  const banner = page.getByTestId("no-project-selected");
+  await page.locator("#noProjectSelectedDismiss").click();
+  await expect(banner).toBeHidden();
+  const navigation = page.waitForNavigation({ waitUntil: "domcontentloaded" });
+  await page.locator("#dashboardProject").dispatchEvent("change");
+  await navigation;
+  await expect(banner).toBeVisible();
+});
+
 test.afterAll(async () => {
   if (dashboard && dashboard.exitCode === null && dashboard.signalCode === null) {
     const exited = new Promise((resolve) => dashboard.once("exit", resolve));