diff --git a/src/apps/work/src/pages/challenges/ChallengeEditorPage/components/SubmissionsSection/SubmissionsSection.spec.tsx b/src/apps/work/src/pages/challenges/ChallengeEditorPage/components/SubmissionsSection/SubmissionsSection.spec.tsx
new file mode 100644
index 000000000..f0d58c0b4
--- /dev/null
+++ b/src/apps/work/src/pages/challenges/ChallengeEditorPage/components/SubmissionsSection/SubmissionsSection.spec.tsx
@@ -0,0 +1,238 @@
+/* eslint-disable global-require, import/no-extraneous-dependencies */
+/* eslint-disable @typescript-eslint/no-var-requires, ordered-imports/ordered-imports */
+import {
+    fireEvent,
+    render,
+    screen,
+} from '@testing-library/react'
+
+import type {
+    Challenge,
+    Submission,
+} from '../../../../../lib/models'
+
+import { SubmissionsSection } from './SubmissionsSection'
+
+const mockUseDownloadAllSubmissions = jest.fn()
+const mockUseDownloadSubmission = jest.fn()
+const mockUseFetchSubmissions = jest.fn()
+const mockFetchMembersByUserIds = jest.fn()
+const mockIsMarathonMatchChallenge = jest.fn()
+
+jest.mock('~/libs/ui', () => ({
+    Button: (props: {
+        disabled?: boolean
+        label: string
+        onClick?: () => void
+    }): JSX.Element => (
+        <button
+            disabled={props.disabled}
+            onClick={props.onClick}
+            type='button'
+        >
+            {props.label}
+        </button>
+    ),
+}), {
+    virtual: true,
+})
+
+jest.mock('../../../../../lib/assets/icons/lock.svg', () => ({
+    ReactComponent: (): JSX.Element => <svg data-testid='lock-icon' />,
+}))
+
+jest.mock('../../../../../lib/components', () => ({
+    ArtifactsModal: (): JSX.Element => <div>Artifacts modal</div>,
+    Pagination: (props: { total: number }): JSX.Element => (
+        <div data-testid='pagination-total'>{props.total}</div>
+    ),
+    SubmissionRunnerLogsModal: (): JSX.Element => <div>Runner logs modal</div>,
+    SubmissionsTable: (props: { submissions: Submission[] }): JSX.Element => (
+        <div data-testid='submissions-table'>
+            {props.submissions.map(submission => (
+                <div data-testid='submission-row' key={submission.id}>
+                    <span>{submission.id}</span>
+                    <span>{submission.memberHandle}</span>
+                </div>
+            ))}
+        </div>
+    ),
+}))
+
+jest.mock('../../../../../lib/constants', () => ({
+    PAGE_SIZE: 10,
+}))
+
+jest.mock('../../../../../lib/contexts', () => {
+    const React = require('react') as typeof import('react')
+
+    return {
+        WorkAppContext: React.createContext({
+            isAdmin: false,
+            isAnonymous: false,
+            isCopilot: false,
+            isManager: false,
+            isReadOnly: false,
+            loginUserInfo: undefined,
+            userRoles: [],
+        }),
+    }
+})
+
+jest.mock('../../../../../lib/hooks', () => ({
+    useDownloadAllSubmissions: (): unknown => mockUseDownloadAllSubmissions(),
+    useDownloadSubmission: (): unknown => mockUseDownloadSubmission(),
+    useFetchSubmissions: (...args: unknown[]): unknown => mockUseFetchSubmissions(...args),
+}))
+
+jest.mock('../../../../../lib/services', () => ({
+    fetchMembersByUserIds: (...args: unknown[]): unknown => mockFetchMembersByUserIds(...args),
+}))
+
+jest.mock('../../../../../lib/utils', () => ({
+    canDownloadSubmissions: (): boolean => false,
+    canViewMarathonMatchRunnerLogs: (): boolean => false,
+    getSubmissionFinalScore: (): number => 0,
+    getSubmissionInitialScore: (): number => 0,
+    getSubmissionProvisionalScore: (): number => 0,
+    getSubmissionSystemScore: (): number => 0,
+    getSubmissionTestProgress: (
+        submission: {
+            reviewSummation?: Array<{
+                metadata?: {
+                    testProcess?: string
+                    testType?: string
+                }
+            }>
+        },
+    ): { process?: string } => {
+        const metadata = submission.reviewSummation?.[0]?.metadata
+
+        return {
+            process: metadata?.testProcess ?? metadata?.testType,
+        }
+    },
+    isMarathonMatchChallenge: (...args: unknown[]): unknown => mockIsMarathonMatchChallenge(...args),
+    showErrorToast: jest.fn(),
+}))
+
+jest.mock('./SubmissionsSection.module.scss', () => new Proxy({}, {
+    get: (_target, property) => String(property),
+}))
+
+const baseChallenge: Challenge = {
+    id: 'challenge-1',
+    name: 'Marathon Match',
+    status: 'ACTIVE',
+}
+
+const submissions: Submission[] = [
+    {
+        challengeId: 'challenge-1',
+        createdAt: '2026-07-01T10:00:00.000Z',
+        createdBy: 'member-1',
+        id: 'system-submission',
+        memberHandle: 'system-user',
+        reviewSummation: [
+            {
+                metadata: {
+                    testProcess: 'system',
+                },
+            },
+        ],
+        type: 'SUBMISSION',
+    },
+    {
+        challengeId: 'challenge-1',
+        createdAt: '2026-07-01T11:00:00.000Z',
+        createdBy: 'member-2',
+        id: 'provisional-submission',
+        memberHandle: 'provisional-user',
+        reviewSummation: [
+            {
+                metadata: {
+                    testProcess: 'provisional',
+                },
+            },
+        ],
+        type: 'SUBMISSION',
+    },
+    {
+        challengeId: 'challenge-1',
+        createdAt: '2026-07-01T12:00:00.000Z',
+        createdBy: 'member-3',
+        id: 'example-submission',
+        memberHandle: 'example-user',
+        reviewSummation: [
+            {
+                metadata: {
+                    testType: 'example',
+                },
+            },
+        ],
+        type: 'SUBMISSION',
+    },
+]
+
+describe('SubmissionsSection', () => {
+    beforeEach(() => {
+        jest.clearAllMocks()
+
+        mockIsMarathonMatchChallenge.mockReturnValue(true)
+        mockUseDownloadAllSubmissions.mockReturnValue({
+            downloadAll: jest.fn(),
+            isDownloading: false,
+            progress: 0,
+        })
+        mockUseDownloadSubmission.mockReturnValue({
+            downloadSubmission: jest.fn(),
+            isLoading: {},
+        })
+        mockUseFetchSubmissions.mockReturnValue({
+            error: undefined,
+            isError: false,
+            isLoading: false,
+            mutate: jest.fn(),
+            submissions,
+            total: submissions.length,
+        })
+        mockFetchMembersByUserIds.mockResolvedValue([])
+    })
+
+    it('filters marathon submissions by test type', () => {
+        render(
+            <SubmissionsSection
+                challenge={baseChallenge}
+                challengeId='challenge-1'
+            />,
+        )
+
+        fireEvent.change(screen.getByLabelText('Test type'), {
+            target: {
+                value: 'system',
+            },
+        })
+
+        expect(screen.getByText('system-submission'))
+            .toBeTruthy()
+        expect(screen.queryByText('provisional-submission'))
+            .toBeNull()
+        expect(screen.queryByText('example-submission'))
+            .toBeNull()
+        expect(screen.getByTestId('pagination-total').textContent)
+            .toBe('1')
+
+        fireEvent.change(screen.getByLabelText('Test type'), {
+            target: {
+                value: 'example',
+            },
+        })
+
+        expect(screen.getByText('example-submission'))
+            .toBeTruthy()
+        expect(screen.queryByText('system-submission'))
+            .toBeNull()
+        expect(screen.queryByText('provisional-submission'))
+            .toBeNull()
+    })
+})
diff --git a/src/apps/work/src/pages/challenges/ChallengeEditorPage/components/SubmissionsSection/SubmissionsSection.tsx b/src/apps/work/src/pages/challenges/ChallengeEditorPage/components/SubmissionsSection/SubmissionsSection.tsx
index 70662c63d..f73961cd5 100644
--- a/src/apps/work/src/pages/challenges/ChallengeEditorPage/components/SubmissionsSection/SubmissionsSection.tsx
+++ b/src/apps/work/src/pages/challenges/ChallengeEditorPage/components/SubmissionsSection/SubmissionsSection.tsx
@@ -36,6 +36,7 @@ import {
     getSubmissionInitialScore,
     getSubmissionProvisionalScore,
     getSubmissionSystemScore,
+    getSubmissionTestProgress,
     isMarathonMatchChallenge,
     showErrorToast,
 } from '../../../../../lib/utils'
@@ -57,6 +58,7 @@ interface FilterState {
     handle: string
     minScore: string
     startDate: string
+    testType: string
 }
 
 interface SubmissionsSectionProps {
@@ -330,6 +332,37 @@ function matchesFilterHandle(submission: Submission, handleFilter: string): bool
         .includes(normalizedHandleFilter)
 }
 
+/**
+ * Checks whether a submission matches the selected marathon test type.
+ * @param submission Submission row being evaluated.
+ * @param testTypeFilter Selected normalized test type filter value.
+ * @param useMarathonMatchScores Whether the current challenge is a Marathon Match.
+ * @returns True when the filter is empty, the challenge is not Marathon Match, or the current test type matches.
+ * Used by `matchesFilters` before the submissions table is sorted and paginated.
+ */
+function matchesFilterTestType(
+    submission: Submission,
+    testTypeFilter: string,
+    useMarathonMatchScores: boolean,
+): boolean {
+    if (!testTypeFilter || !useMarathonMatchScores) {
+        return true
+    }
+
+    const normalizedTestTypeFilter = normalizeValue(testTypeFilter)
+        .toLowerCase()
+
+    return getSubmissionTestProgress(submission).process === normalizedTestTypeFilter
+}
+
+/**
+ * Checks whether a submission satisfies all active submissions list filters.
+ * @param submission Submission row being evaluated.
+ * @param filters Current filter values from the submissions form.
+ * @param useMarathonMatchScores Whether the current challenge is a Marathon Match.
+ * @returns True when the submission should remain visible in the table.
+ * Used before sorting and paginating the submissions list.
+ */
 function matchesFilters(
     submission: Submission,
     filters: FilterState,
@@ -343,6 +376,10 @@ function matchesFilters(
         return false
     }
 
+    if (!matchesFilterTestType(submission, filters.testType, useMarathonMatchScores)) {
+        return false
+    }
+
     return matchesFilterScore(submission, filters.minScore, useMarathonMatchScores)
 }
 
@@ -361,6 +398,7 @@ export const SubmissionsSection: FC<SubmissionsSectionProps> = (
         handle: '',
         minScore: '',
         startDate: '',
+        testType: '',
     })
     const [memberCache, setMemberCache] = useState<MemberCache>({})
     const [page, setPage] = useState<number>(1)
@@ -584,7 +622,9 @@ export const SubmissionsSection: FC<SubmissionsSectionProps> = (
         setPerPage(nextPerPage)
     }, [])
 
-    const handleFilterChange = useCallback((event: ChangeEvent<HTMLInputElement>): void => {
+    const handleFilterChange = useCallback((
+        event: ChangeEvent<HTMLInputElement | HTMLSelectElement>,
+    ): void => {
         const fieldName: string = event.target.name
         const fieldValue: string = event.target.value
 
@@ -642,6 +682,26 @@ export const SubmissionsSection: FC<SubmissionsSectionProps> = (
                     />
                 </label>
 
+                {isMarathonMatch
+                    ? (
+                        <label className={styles.filterLabel} htmlFor='submission-test-type-filter'>
+                            Test type
+                            <select
+                                className={styles.filterInput}
+                                id='submission-test-type-filter'
+                                name='testType'
+                                onChange={handleFilterChange}
+                                value={filters.testType}
+                            >
+                                <option value=''>All</option>
+                                <option value='system'>System</option>
+                                <option value='provisional'>Provisional</option>
+                                <option value='example'>Example</option>
+                            </select>
+                        </label>
+                    )
+                    : undefined}
+
                 <label className={styles.filterLabel} htmlFor='submission-start-date-filter'>
                     From
                     <input