diff --git a/src/app/(web)/crm/positions/[id]/page.tsx b/src/app/(web)/crm/positions/[id]/page.tsx
index f997853c..52d57908 100644
--- a/src/app/(web)/crm/positions/[id]/page.tsx
+++ b/src/app/(web)/crm/positions/[id]/page.tsx
@@ -7,7 +7,7 @@ import UploadCSVModal from '@/lib/components/modal/UploadCSVModal';
 import useCandidates from '@/lib/hooks/useCandidates';
 import { Search } from '@/lib/components/core/Search';
 import { Tabs, TabsContent, TabsList, UnderlineTabsTrigger } from '@/lib/components/ui/Tabs';
-import { Plus, ArrowUpDown, SlidersHorizontal } from 'lucide-react';
+import { Plus, ArrowUpDown, SlidersHorizontal, Mail } from 'lucide-react';
 import { use, useState } from 'react';
 import useSearch from '@/lib/hooks/useSearch';
 import Breadcrumbs from '@/lib/components/core/Breadcrumbs';
@@ -16,8 +16,16 @@ export default function CandidatesPage({ params }: { params: Promise<{ id: strin
     const { id } = use(params);
     const [isModalManualOpen, setIsModalManualOpen] = useState(false);
     const [isCSVModalOpen, setIsCSVModalOpen] = useState(false);
-    const { candidates, loading, error, positionTitle, createCandidate, batchCreateCandidates } =
-        useCandidates(id);
+    const {
+        candidates,
+        loading,
+        error,
+        positionTitle,
+        createCandidate,
+        batchCreateCandidates,
+        isSendingAssessments,
+        handleSendAssessments,
+    } = useCandidates(id);
     const { value: searchValue, onChange: onSearchChange } = useSearch('applications');
 
     const displayedCandidates = searchValue.trim().length
@@ -91,7 +99,18 @@ export default function CandidatesPage({ params }: { params: Promise<{ id: strin
                             <br />
                         </TabsContent>
 
-                        <TabsContent value="assessment">{/* No content yet */}</TabsContent>
+                        <TabsContent value="assessment">
+                            <div className="flex w-full justify-end">
+                                <Button
+                                    className="px-4 py-3"
+                                    onClick={handleSendAssessments}
+                                    disabled={isSendingAssessments}
+                                >
+                                    <Mail className="size-5" />
+                                    {isSendingAssessments ? 'Sending...' : 'Send to all candidates'}
+                                </Button>
+                            </div>
+                        </TabsContent>
                     </Tabs>
                 )}
             </div>
diff --git a/src/app/api/assessments/send-invitation/route.ts b/src/app/api/assessments/send-invitation/route.ts
index f59bbc56..6d960e93 100644
--- a/src/app/api/assessments/send-invitation/route.ts
+++ b/src/app/api/assessments/send-invitation/route.ts
@@ -1,13 +1,8 @@
 import { type NextRequest } from 'next/server';
-import { z } from 'zod';
 import { handleError } from '@/lib/utils/errors.utils';
 import { getSession } from '@/lib/utils/auth.utils';
 import { assertRecruiterOrAbove } from '@/lib/utils/permissions.utils';
-import emailService from '@/lib/services/email.service';
-
-const sendAssessmentInvitationSchema = z.object({
-    candidateId: z.string().cuid(),
-});
+import AssessmentService from '@/lib/services/assessment.service';
 
 export async function POST(request: NextRequest) {
     try {
@@ -15,19 +10,14 @@ export async function POST(request: NextRequest) {
         await assertRecruiterOrAbove(request.headers);
 
         const body = await request.json();
-        const { candidateId } = sendAssessmentInvitationSchema.parse(body);
+        const { positionId } = body as { positionId: string };
 
-        const result = await emailService.sendAssessmentInvitationEmail(
-            candidateId,
+        const result = await AssessmentService.sendAssessmentInvitationsToPosition(
+            positionId,
             session.activeOrganizationId
         );
 
-        return Response.json(
-            {
-                data: result,
-            },
-            { status: 200 }
-        );
+        return Response.json({ data: result }, { status: 200 });
     } catch (err) {
         return handleError(err);
     }
diff --git a/src/lib/api/assessments.ts b/src/lib/api/assessments.ts
index 2e73f4b0..b2959c33 100644
--- a/src/lib/api/assessments.ts
+++ b/src/lib/api/assessments.ts
@@ -1,7 +1,10 @@
 import { type Application } from '@/generated/prisma';
 import { type AssessmentStatus } from '@/generated/prisma';
 import { type Assessment, type UpdateAssessmentDTO } from '@/lib/schemas/assessment.schema';
-import { type AssessmentWithRelations } from '@/lib/types/assessment-template.types';
+import {
+    type AssessmentWithRelations,
+    type AssessmentInvitationResult,
+} from '@/lib/types/assessment-template.types';
 
 /**
  * GET /api/assessments/:assessmentId
@@ -67,27 +70,23 @@ export async function updateAssessmentStatus(
 
 /**
  * POST /api/assessments/send-invitation
- * Sends an assessment invitation email to a candidate
+ * Sends assessment invitation emails to all NOT_SENT candidates of a position
  */
-export async function sendAssessmentInvitation(candidateId: string): Promise<{
-    success: boolean;
-    message: string;
-    candidateName: string;
-    positionTitle: string;
-    assessmentId: string;
-}> {
+export async function sendAssessmentInvitation(
+    positionId: string
+): Promise<AssessmentInvitationResult> {
     const res = await fetch('/api/assessments/send-invitation', {
         method: 'POST',
         headers: {
             'Content-Type': 'application/json',
         },
-        body: JSON.stringify({ candidateId }),
+        body: JSON.stringify({ positionId }),
     });
 
     const json = await res.json();
 
     if (!res.ok) {
-        throw new Error(json.error ?? json.message ?? 'Failed to send assessment invitation');
+        throw new Error(json.message ?? 'Failed to send assessment invitation');
     }
 
     return json.data;
diff --git a/src/lib/hooks/useCandidates.ts b/src/lib/hooks/useCandidates.ts
index c2b23188..9b05ce1b 100644
--- a/src/lib/hooks/useCandidates.ts
+++ b/src/lib/hooks/useCandidates.ts
@@ -8,6 +8,7 @@ import {
     createCandidate as createCandidateApi,
     batchCreateCandidates as batchCreateCandidatesApi,
 } from '@/lib/api/positions';
+import { sendAssessmentInvitation } from '@/lib/api/assessments';
 
 interface UseCandidatesReturn {
     candidates: ApplicationDisplayInfo[];
@@ -16,6 +17,8 @@ interface UseCandidatesReturn {
     positionTitle: string | null;
     createCandidate: (candidate: AddApplicationWithCandidateDataDTO) => Promise<void>;
     batchCreateCandidates: (candidates: AddApplicationWithCandidateDataDTO[]) => Promise<void>;
+    isSendingAssessments: boolean;
+    handleSendAssessments: () => Promise<void>;
 }
 
 export default function useCandidates(positionId: string): UseCandidatesReturn {
@@ -23,6 +26,7 @@ export default function useCandidates(positionId: string): UseCandidatesReturn {
     const [loading, setLoading] = useState(true);
     const [error, setError] = useState<string | null>(null);
     const [positionTitle, setPositionTitle] = useState<string | null>(null);
+    const [isSendingAssessments, setIsSendingAssessments] = useState(false);
 
     useEffect(() => {
         if (!positionId) return;
@@ -89,6 +93,38 @@ export default function useCandidates(positionId: string): UseCandidatesReturn {
         }
     };
 
+    const handleSendAssessments = async () => {
+        try {
+            setIsSendingAssessments(true);
+            const result = await sendAssessmentInvitation(positionId);
+
+            if (result.totalSent > 0) {
+                toast.success(
+                    `Successfully sent ${result.totalSent} assessment invitation${result.totalSent !== 1 ? 's' : ''}`
+                );
+            }
+
+            if (result.totalFailed > 0) {
+                toast.error(
+                    `Failed to send ${result.totalFailed} invitation${result.totalFailed !== 1 ? 's' : ''}`
+                );
+            }
+
+            if (result.totalSent === 0 && result.totalFailed === 0) {
+                toast.info('No candidates with pending assessments to send');
+            }
+        } catch (err) {
+            const errorMessage = (err as Error).message;
+            if (errorMessage.includes('does not have an assessment template assigned')) {
+                toast.error('This position does not have an assessment template assigned');
+            } else {
+                toast.error(errorMessage || 'Failed to send assessment invitations');
+            }
+        } finally {
+            setIsSendingAssessments(false);
+        }
+    };
+
     return {
         candidates,
         loading,
@@ -96,5 +132,7 @@ export default function useCandidates(positionId: string): UseCandidatesReturn {
         positionTitle,
         createCandidate,
         batchCreateCandidates,
+        isSendingAssessments,
+        handleSendAssessments,
     };
 }
diff --git a/src/lib/services/assessment.service.ts b/src/lib/services/assessment.service.ts
index 96569046..fa752e7f 100644
--- a/src/lib/services/assessment.service.ts
+++ b/src/lib/services/assessment.service.ts
@@ -7,10 +7,14 @@ import type {
 } from '@/lib/schemas/assessment.schema';
 import { AssessmentStatus } from '@/generated/prisma';
 import { BadRequestException, NotFoundException } from '@/lib/utils/errors.utils';
-import { type AssessmentWithRelations } from '@/lib/types/assessment-template.types';
+import {
+    type AssessmentWithRelations,
+    type AssessmentInvitationResult,
+} from '@/lib/types/assessment-template.types';
 import type { CandidateAssessment } from '@/lib/types/candidate-assessment.types';
 import type { BlockNoteContent } from '@/lib/types/task-template.types';
 import type { TestCaseDTO } from '@/lib/schemas/task-template.schema';
+import emailService from '@/lib/services/email.service';
 
 async function getAssessmentWithRelations(
     id: string,
@@ -338,6 +342,73 @@ async function submitAssessmentForCandidate(assessmentId: string): Promise<void>
     ]);
 }
 
+async function sendAssessmentInvitationsToPosition(
+    positionId: string,
+    orgId: string
+): Promise<AssessmentInvitationResult> {
+    const position = await prisma.position.findUnique({
+        where: { id: positionId },
+        select: { assessmentId: true, orgId: true },
+    });
+
+    if (!position) {
+        throw new NotFoundException('Position', positionId);
+    }
+
+    if (position.orgId !== orgId) {
+        throw new BadRequestException('Position does not belong to your organization');
+    }
+
+    if (!position.assessmentId) {
+        throw new BadRequestException('Position does not have an assessment template assigned');
+    }
+
+    const applications = await prisma.application.findMany({
+        where: {
+            positionId,
+            assessmentStatus: 'NOT_SENT',
+        },
+        include: {
+            candidate: true,
+        },
+    });
+
+    const results = [];
+    for (const application of applications) {
+        try {
+            const result = await emailService.sendAssessmentInvitationEmail(
+                application.candidate.id,
+                orgId
+            );
+
+            await prisma.application.update({
+                where: { id: application.id },
+                data: { assessmentStatus: 'NOT_STARTED' },
+            });
+
+            results.push({
+                ...result,
+                applicationId: application.id,
+            });
+        } catch (err) {
+            results.push({
+                success: false,
+                message: `Failed to send invitation to ${application.candidate.name}: ${(err as Error).message}`,
+                candidateName: application.candidate.name,
+                positionTitle: '',
+                assessmentId: '',
+                applicationId: application.id,
+            });
+        }
+    }
+
+    return {
+        totalSent: results.filter((r) => r.success).length,
+        totalFailed: results.filter((r) => !r.success).length,
+        results,
+    };
+}
+
 const AssessmentService = {
     getAssessmentWithRelations,
     getAssessmentForCandidate,
@@ -346,6 +417,7 @@ const AssessmentService = {
     assignTemplateToPosition,
     deleteAssessment,
     updateAssessment,
+    sendAssessmentInvitationsToPosition,
 };
 
 export default AssessmentService;
diff --git a/src/lib/types/assessment-template.types.ts b/src/lib/types/assessment-template.types.ts
index 78e4e4ce..fdf75852 100644
--- a/src/lib/types/assessment-template.types.ts
+++ b/src/lib/types/assessment-template.types.ts
@@ -22,6 +22,19 @@ export type TaskSection = {
     order: number;
 };
 
+export type AssessmentInvitationResult = {
+    totalSent: number;
+    totalFailed: number;
+    results: Array<{
+        success: boolean;
+        message: string;
+        candidateName: string;
+        positionTitle: string;
+        assessmentId: string;
+        applicationId: string;
+    }>;
+};
+
 // TODO: TextSection will be added here
 // export type TextSection = {
 //     type: 'text';