diff --git a/orchestrator/src/client/components/JobHeader.test.tsx b/orchestrator/src/client/components/JobHeader.test.tsx
new file mode 100644
index 0000000..b9a0232
--- /dev/null
+++ b/orchestrator/src/client/components/JobHeader.test.tsx
@@ -0,0 +1,105 @@
+import React from "react";
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { render, screen, fireEvent, waitFor } from "@testing-library/react";
+import { JobHeader } from "./JobHeader";
+import { useSettings } from "../hooks/useSettings";
+import * as api from "../api";
+import type { Job } from "../../shared/types";
+
+// Mock useSettings
+vi.mock("../hooks/useSettings", () => ({
+    useSettings: vi.fn(),
+}));
+
+// Mock api
+vi.mock("../api", () => ({
+    checkSponsor: vi.fn(),
+}));
+
+// Mock Tooltip components to simplify testing
+vi.mock("@/components/ui/tooltip", () => ({
+    TooltipProvider: ({ children }: { children: React.ReactNode }) => <>{children}</>,
+    Tooltip: ({ children }: { children: React.ReactNode }) => <>{children}</>,
+    TooltipTrigger: ({ children }: { children: React.ReactNode }) => <>{children}</>,
+    TooltipContent: ({ children }: { children: React.ReactNode }) => (
+        <div data-testid="tooltip-content">{children}</div>
+    ),
+}));
+
+const mockJob: Job = {
+    id: "job-1",
+    title: "Software Engineer",
+    employer: "Tech Corp",
+    location: "London",
+    salary: "£60,000",
+    deadline: "2025-12-31",
+    status: "discovered",
+    source: "linkedin",
+    suitabilityScore: 85,
+    suitabilityReason: "Strong match",
+    sponsorMatchScore: null,
+    sponsorMatchNames: null,
+    // Other fields...
+} as Job;
+
+describe("JobHeader", () => {
+    beforeEach(() => {
+        vi.clearAllMocks();
+        (useSettings as any).mockReturnValue({
+            showSponsorInfo: true,
+        });
+    });
+
+    it("renders basic job information", () => {
+        render(<JobHeader job={mockJob} />);
+        expect(screen.getByText("Software Engineer")).toBeInTheDocument();
+        expect(screen.getByText("Tech Corp")).toBeInTheDocument();
+        expect(screen.getByText("London")).toBeInTheDocument();
+        expect(screen.getByText("£60,000")).toBeInTheDocument();
+    });
+
+    it("shows 'Check Sponsorship Status' button when sponsorMatchScore is null", async () => {
+        const onCheckSponsor = vi.fn().mockResolvedValue(undefined);
+        render(<JobHeader job={mockJob} onCheckSponsor={onCheckSponsor} />);
+
+        const button = screen.getByText("Check Sponsorship Status");
+        expect(button).toBeInTheDocument();
+
+        fireEvent.click(button);
+
+        expect(onCheckSponsor).toHaveBeenCalled();
+    });
+
+    it("shows 'Confirmed Sponsor' when score >= 95", () => {
+        const jobWithSponsor = { ...mockJob, sponsorMatchScore: 98, sponsorMatchNames: '["Tech Corp Ltd"]' };
+        render(<JobHeader job={jobWithSponsor} />);
+
+        expect(screen.getByText("Confirmed Sponsor")).toBeInTheDocument();
+    });
+
+    it("shows 'Potential Sponsor' when score is between 80 and 94", () => {
+        const jobWithPotential = { ...mockJob, sponsorMatchScore: 85, sponsorMatchNames: '["Techy Corp"]' };
+        render(<JobHeader job={jobWithPotential} />);
+
+        expect(screen.getByText("Potential Sponsor")).toBeInTheDocument();
+    });
+
+    it("shows 'Sponsor Not Found' when score < 80", () => {
+        const jobNoSponsor = { ...mockJob, sponsorMatchScore: 40, sponsorMatchNames: '["Other Corp"]' };
+        render(<JobHeader job={jobNoSponsor} />);
+
+        expect(screen.getByText("Sponsor Not Found")).toBeInTheDocument();
+    });
+
+    it("hides sponsor info when showSponsorInfo is false", () => {
+        (useSettings as any).mockReturnValue({
+            showSponsorInfo: false,
+        });
+
+        const jobWithSponsor = { ...mockJob, sponsorMatchScore: 98 };
+        render(<JobHeader job={jobWithSponsor} />);
+
+        expect(screen.queryByText("Confirmed Sponsor")).not.toBeInTheDocument();
+        expect(screen.queryByText("Check Sponsorship Status")).not.toBeInTheDocument();
+    });
+});
diff --git a/orchestrator/src/client/hooks/useSettings.test.ts b/orchestrator/src/client/hooks/useSettings.test.ts
new file mode 100644
index 0000000..e8aff35
--- /dev/null
+++ b/orchestrator/src/client/hooks/useSettings.test.ts
@@ -0,0 +1,66 @@
+import { renderHook, waitFor } from '@testing-library/react';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { useSettings, _resetSettingsCache } from './useSettings';
+import * as api from '../api';
+
+vi.mock('../api', () => ({
+    getSettings: vi.fn(),
+}));
+
+describe('useSettings', () => {
+    beforeEach(() => {
+        vi.clearAllMocks();
+        _resetSettingsCache();
+    });
+
+    it('fetches settings on mount if not already cached', async () => {
+        const mockSettings = { showSponsorInfo: false };
+        (api.getSettings as any).mockResolvedValue(mockSettings);
+
+        const { result } = renderHook(() => useSettings());
+
+        // Should start in loading state
+        expect(result.current.settings).toBeNull();
+
+        await waitFor(() => {
+            expect(result.current.settings).toEqual(mockSettings);
+        });
+
+        expect(result.current.showSponsorInfo).toBe(false);
+        expect(api.getSettings).toHaveBeenCalledTimes(1);
+    });
+
+    it('uses default values when settings are null', async () => {
+        (api.getSettings as any).mockResolvedValue(null);
+
+        const { result } = renderHook(() => useSettings());
+
+        await waitFor(() => {
+            // settings is null, so showSponsorInfo should default to true
+            expect(result.current.showSponsorInfo).toBe(true);
+        });
+    });
+
+    it('provides a refresh function that updates settings', async () => {
+        const initialSettings = { showSponsorInfo: true };
+        const updatedSettings = { showSponsorInfo: false };
+
+        (api.getSettings as any).mockResolvedValueOnce(initialSettings);
+        (api.getSettings as any).mockResolvedValueOnce(updatedSettings);
+
+        const { result } = renderHook(() => useSettings());
+
+        await waitFor(() => {
+            expect(result.current.settings).toEqual(initialSettings);
+        });
+
+        let refreshed;
+        await waitFor(async () => {
+            refreshed = await result.current.refreshSettings();
+        });
+
+        expect(refreshed).toEqual(updatedSettings);
+        expect(result.current.settings).toEqual(updatedSettings);
+        expect(result.current.showSponsorInfo).toBe(false);
+    });
+});
diff --git a/orchestrator/src/client/hooks/useSettings.ts b/orchestrator/src/client/hooks/useSettings.ts
index c970690..cb8fae3 100644
--- a/orchestrator/src/client/hooks/useSettings.ts
+++ b/orchestrator/src/client/hooks/useSettings.ts
@@ -56,3 +56,10 @@ export function useSettings() {
         refreshSettings,
     };
 }
+
+/** @internal For testing only */
+export function _resetSettingsCache() {
+    settingsCache = null;
+    isFetching = false;
+    subscribers.clear();
+}
diff --git a/orchestrator/src/server/api/routes/jobs.test.ts b/orchestrator/src/server/api/routes/jobs.test.ts
index 14324de..7fba136 100644
--- a/orchestrator/src/server/api/routes/jobs.test.ts
+++ b/orchestrator/src/server/api/routes/jobs.test.ts
@@ -95,4 +95,26 @@ describe.sequential('Jobs API routes', () => {
       })
     );
   });
+
+  it('checks visa sponsor status for a job', async () => {
+    const { searchSponsors } = await import('../../services/visa-sponsors/index.js');
+    vi.mocked(searchSponsors).mockReturnValue([
+      { sponsor: { organisationName: 'ACME CORP SPONSOR' } as any, score: 100, matchedName: 'acme corp sponsor' }
+    ]);
+
+    const { createJob } = await import('../../repositories/jobs.js');
+    const job = await createJob({
+      source: 'manual',
+      title: 'Sponsored Dev',
+      employer: 'Acme',
+      jobUrl: 'https://example.com/job/4',
+    });
+
+    const res = await fetch(`${baseUrl}/api/jobs/${job.id}/check-sponsor`, { method: 'POST' });
+    const body = await res.json();
+
+    expect(body.success).toBe(true);
+    expect(body.data.sponsorMatchScore).toBe(100);
+    expect(body.data.sponsorMatchNames).toContain('ACME CORP SPONSOR');
+  });
 });