diff --git a/frontend/src/admin/AccountView.jsx b/frontend/src/admin/AccountView.jsx
new file mode 100644
index 0000000..62fc567
--- /dev/null
+++ b/frontend/src/admin/AccountView.jsx
@@ -0,0 +1,39 @@
+import { useState } from 'react'
+import { adminApi } from './api'
+import styles from './Admin.module.css'
+
+export default function AccountView({ instructor }) {
+  const [oldPassword, setOldPassword] = useState('')
+  const [newPassword, setNewPassword] = useState('')
+  const [error, setError] = useState(null)
+  const [notice, setNotice] = useState(null)
+  const [busy, setBusy] = useState(false)
+
+  const submit = async (e) => {
+    e.preventDefault()
+    setBusy(true); setError(null); setNotice(null)
+    try {
+      await adminApi.changePassword(oldPassword, newPassword)
+      setOldPassword(''); setNewPassword('')
+      setNotice('Password changed. Any other sessions you had open elsewhere were signed out.')
+    } catch (e) { setError(e.message) } finally { setBusy(false) }
+  }
+
+  return (
+    <div className={styles.card}>
+      <h2>Account</h2>
+      <p className={styles.muted}>{instructor.display_name} · {instructor.email} · role: {instructor.role}</p>
+
+      <h3 style={{ marginTop: '1.5rem' }}>Change password</h3>
+      <form onSubmit={submit} className={styles.formRow}>
+        {error && <div className={styles.errorBox}>{error}</div>}
+        <div><label className={styles.label}>Current password</label>
+          <input className={styles.input} type="password" value={oldPassword} onChange={(e) => setOldPassword(e.target.value)} autoComplete="current-password" required /></div>
+        <div><label className={styles.label}>New password (12+ chars)</label>
+          <input className={styles.input} type="password" value={newPassword} onChange={(e) => setNewPassword(e.target.value)} autoComplete="new-password" minLength={12} required /></div>
+        <div><button className={styles.btn} disabled={busy}>{busy ? 'Changing…' : 'Change password'}</button></div>
+      </form>
+      {notice && <p className={styles.muted}>{notice}</p>}
+    </div>
+  )
+}
diff --git a/frontend/src/admin/AdminPortal.jsx b/frontend/src/admin/AdminPortal.jsx
index 30c5263..ec98dc0 100644
--- a/frontend/src/admin/AdminPortal.jsx
+++ b/frontend/src/admin/AdminPortal.jsx
@@ -3,46 +3,66 @@ import { adminApi } from './api'
 import AdminDashboard from './AdminDashboard'
 import CohortsView from './CohortsView'
 import StudentsView from './StudentsView'
+import InstructorsView from './InstructorsView'
+import AuditView from './AuditView'
+import AccountView from './AccountView'
 import styles from './Admin.module.css'
 
 // Instructor/Admin portal — clearly separate from the student experience (/admin route,
-// separate rn_admin session cookie, separate login). A student session cannot reach any of
-// these views or their underlying /api/admin/* routes — see
-// docs/PHASE2B_ADMIN_AND_PLATFORM_DATA.md §10.
+// separate rn_instructor session cookie, separate login). A student session cannot reach any
+// of these views or their underlying /api/admin/* routes. Per-person accounts replace Phase
+// 2B's single shared ADMIN_PASSWORD — see docs/PHASE3A_IDENTITY_AND_INSTRUCTOR_ACCESS.md.
+const NAV = [
+  { key: 'dashboard', label: 'Dashboard' },
+  { key: 'cohorts', label: 'Cohorts' },
+  { key: 'students', label: 'Students' },
+  { key: 'instructors', label: 'Instructors', roles: ['owner'] },
+  { key: 'audit', label: 'Audit', roles: ['owner', 'admin'] },
+]
+
 export default function AdminPortal() {
-  const [authed, setAuthed] = useState(null) // null = checking, false = need login, true = in
+  const [instructor, setInstructor] = useState(null) // null = checking, false = need login, object = signed in
   const [view, setView] = useState('dashboard')
 
   useEffect(() => {
-    adminApi.whoami().then(() => setAuthed(true)).catch(() => setAuthed(false))
+    adminApi.session().then((r) => setInstructor(r.instructor)).catch(() => setInstructor(false))
   }, [])
 
-  if (authed === null) return null
-  if (!authed) return <AdminLogin onLogin={() => setAuthed(true)} />
+  if (instructor === null) return null
+  if (!instructor) return <InstructorLogin onLogin={setInstructor} />
+
+  const visibleNav = NAV.filter((item) => !item.roles || item.roles.includes(instructor.role))
 
   return (
     <div className={styles.wrap}>
       <header className={styles.header}>
         <div className={styles.brand}>⚙ RootNode Admin</div>
         <nav className={styles.nav}>
-          {['dashboard', 'cohorts', 'students'].map((v) => (
-            <button key={v} className={`${styles.navLink} ${view === v ? styles.navLinkActive : ''}`} onClick={() => setView(v)}>
-              {v[0].toUpperCase() + v.slice(1)}
+          {visibleNav.map((item) => (
+            <button key={item.key} className={`${styles.navLink} ${view === item.key ? styles.navLinkActive : ''}`} onClick={() => setView(item.key)}>
+              {item.label}
             </button>
           ))}
-          <button className={styles.navLink} onClick={() => adminApi.logout().then(() => setAuthed(false))}>Sign out</button>
+          <button className={`${styles.navLink} ${view === 'account' ? styles.navLinkActive : ''}`} onClick={() => setView('account')}>
+            {instructor.display_name}
+          </button>
+          <button className={styles.navLink} onClick={() => adminApi.logout().then(() => setInstructor(false))}>Sign out</button>
         </nav>
       </header>
       <div className={styles.content}>
         {view === 'dashboard' && <AdminDashboard />}
-        {view === 'cohorts' && <CohortsView />}
-        {view === 'students' && <StudentsView />}
+        {view === 'cohorts' && <CohortsView role={instructor.role} />}
+        {view === 'students' && <StudentsView role={instructor.role} />}
+        {view === 'instructors' && instructor.role === 'owner' && <InstructorsView currentInstructorId={instructor.instructor_id} />}
+        {view === 'audit' && ['owner', 'admin'].includes(instructor.role) && <AuditView />}
+        {view === 'account' && <AccountView instructor={instructor} />}
       </div>
     </div>
   )
 }
 
-function AdminLogin({ onLogin }) {
+function InstructorLogin({ onLogin }) {
+  const [email, setEmail] = useState('')
   const [password, setPassword] = useState('')
   const [error, setError] = useState(null)
   const [busy, setBusy] = useState(false)
@@ -50,9 +70,14 @@ function AdminLogin({ onLogin }) {
   const submit = async (e) => {
     e.preventDefault()
     setBusy(true); setError(null)
-    try { await adminApi.login(password); onLogin() }
-    catch (e) { setError('Incorrect password.') }
-    finally { setBusy(false) }
+    try {
+      const { instructor } = await adminApi.login(email, password)
+      onLogin(instructor)
+    } catch (e) {
+      setError(e.message || 'Sign-in failed.')
+    } finally {
+      setBusy(false)
+    }
   }
 
   return (
@@ -61,9 +86,11 @@ function AdminLogin({ onLogin }) {
         <div className={styles.brand}>⚙ RootNode Admin</div>
         <p className={styles.subtitle}>Instructor sign-in. Not connected to student accounts.</p>
         {error && <div className={styles.errorBox}>{error}</div>}
-        <label className={styles.label}>Password</label>
-        <input className={styles.input} type="password" value={password} onChange={(e) => setPassword(e.target.value)} autoFocus />
-        <button className={styles.btn} style={{ marginTop: '1.25rem', width: '100%' }} disabled={busy || !password}>
+        <label className={styles.label}>Email</label>
+        <input className={styles.input} type="email" value={email} onChange={(e) => setEmail(e.target.value)} autoFocus autoComplete="username" />
+        <label className={styles.label} style={{ marginTop: '0.75rem' }}>Password</label>
+        <input className={styles.input} type="password" value={password} onChange={(e) => setPassword(e.target.value)} autoComplete="current-password" />
+        <button className={styles.btn} style={{ marginTop: '1.25rem', width: '100%' }} disabled={busy || !email || !password}>
           {busy ? 'Signing in…' : 'Sign in'}
         </button>
       </form>
diff --git a/frontend/src/admin/AuditView.jsx b/frontend/src/admin/AuditView.jsx
new file mode 100644
index 0000000..cad4510
--- /dev/null
+++ b/frontend/src/admin/AuditView.jsx
@@ -0,0 +1,38 @@
+import { useState, useEffect } from 'react'
+import { adminApi } from './api'
+import styles from './Admin.module.css'
+
+// admin/owner only (enforced server-side too). Latest 200 events, no pagination UI — this is a
+// pilot-scale audit log, not a SIEM; add pagination if that ever stops being true.
+export default function AuditView() {
+  const [events, setEvents] = useState(null)
+  const [error, setError] = useState(null)
+
+  useEffect(() => {
+    adminApi.auditEvents().then(setEvents).catch((e) => setError(e.message))
+  }, [])
+
+  return (
+    <div className={styles.card}>
+      <h2>Audit log</h2>
+      <p className={styles.muted}>Most recent 200 security/admin events.</p>
+      {error && <div className={styles.errorBox}>{error}</div>}
+      {!events ? <p className={styles.muted}>Loading…</p> : (
+        <table>
+          <thead><tr><th>When</th><th>Actor</th><th>Action</th><th>Resource</th><th>Result</th></tr></thead>
+          <tbody>
+            {events.map((e) => (
+              <tr key={e.audit_event_id}>
+                <td>{new Date(e.created_at).toLocaleString()}</td>
+                <td>{e.actor_type}{e.actor_id ? ` · ${e.actor_id.slice(0, 8)}` : ''}</td>
+                <td>{e.action}</td>
+                <td>{e.resource_type ? `${e.resource_type}${e.resource_id ? ` (${e.resource_id})` : ''}` : '—'}</td>
+                <td><span className={`${styles.pill} ${e.result === 'success' ? styles.pillOk : styles.pillErr}`}>{e.result}</span></td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      )}
+    </div>
+  )
+}
diff --git a/frontend/src/admin/CohortsView.jsx b/frontend/src/admin/CohortsView.jsx
index 3c13252..b4e1a66 100644
--- a/frontend/src/admin/CohortsView.jsx
+++ b/frontend/src/admin/CohortsView.jsx
@@ -2,25 +2,28 @@ import { useState, useEffect, useCallback } from 'react'
 import { adminApi } from './api'
 import styles from './Admin.module.css'
 
-export default function CohortsView() {
+export default function CohortsView({ role }) {
   const [cohorts, setCohorts] = useState(null)
   const [selected, setSelected] = useState(null)
   const [error, setError] = useState(null)
+  const canManage = role !== 'instructor' // owner/admin only — a plain instructor works within cohorts already assigned to them
 
   const reload = useCallback(() => {
     adminApi.cohorts().then(setCohorts).catch((e) => setError(e.message))
   }, [])
   useEffect(reload, [reload])
 
-  if (selected) return <CohortDetail cohortId={selected} onBack={() => { setSelected(null); reload() }} />
+  if (selected) return <CohortDetail cohortId={selected} canManage={canManage} onBack={() => { setSelected(null); reload() }} />
 
   return (
     <>
       {error && <div className={styles.errorBox}>{error}</div>}
-      <div className={styles.card}>
-        <h2>Create cohort</h2>
-        <CreateCohortForm onCreated={reload} />
-      </div>
+      {canManage && (
+        <div className={styles.card}>
+          <h2>Create cohort</h2>
+          <CreateCohortForm onCreated={reload} />
+        </div>
+      )}
       <div className={styles.card}>
         <h2>Cohorts</h2>
         {!cohorts ? <p className={styles.muted}>Loading…</p> : cohorts.length === 0 ? <p className={styles.muted}>None yet.</p> : (
@@ -79,7 +82,7 @@ function CreateCohortForm({ onCreated }) {
   )
 }
 
-function CohortDetail({ cohortId, onBack }) {
+function CohortDetail({ cohortId, canManage, onBack }) {
   const [students, setStudents] = useState(null)
   const [progress, setProgress] = useState(null)
   const [prepResults, setPrepResults] = useState(null)
@@ -136,10 +139,12 @@ function CohortDetail({ cohortId, onBack }) {
 
       <div className={styles.card}>
         <h3>Roster ({students?.length ?? '…'})</h3>
-        <form onSubmit={addStudent} className={styles.formRow}>
-          <div><input className={styles.input} placeholder="New student name" value={newStudentName} onChange={(e) => setNewStudentName(e.target.value)} /></div>
-          <div><button className={styles.btn} disabled={busy}>Add student</button></div>
-        </form>
+        {canManage && (
+          <form onSubmit={addStudent} className={styles.formRow}>
+            <div><input className={styles.input} placeholder="New student name" value={newStudentName} onChange={(e) => setNewStudentName(e.target.value)} /></div>
+            <div><button className={styles.btn} disabled={busy}>Add student</button></div>
+          </form>
+        )}
         {students && (
           <table>
             <thead><tr><th>Name</th><th>Status</th><th>Last active</th></tr></thead>
@@ -156,11 +161,13 @@ function CohortDetail({ cohortId, onBack }) {
         )}
       </div>
 
-      <div className={styles.card}>
-        <h3>Curriculum</h3>
-        <p className={styles.muted}>RootNode Learning Path (Foundation → Workloads → Networking → Configuration → Troubleshooting → Real Ops → Capstone)</p>
-        <button className={styles.btnSecondary} onClick={assignCurriculum} disabled={busy}>Assign RootNode Path to cohort</button>
-      </div>
+      {canManage && (
+        <div className={styles.card}>
+          <h3>Curriculum</h3>
+          <p className={styles.muted}>RootNode Learning Path (Foundation → Workloads → Networking → Configuration → Troubleshooting → Real Ops → Capstone)</p>
+          <button className={styles.btnSecondary} onClick={assignCurriculum} disabled={busy}>Assign RootNode Path to cohort</button>
+        </div>
+      )}
 
       {progress && (
         <div className={styles.card}>
diff --git a/frontend/src/admin/InstructorsView.jsx b/frontend/src/admin/InstructorsView.jsx
new file mode 100644
index 0000000..8972f91
--- /dev/null
+++ b/frontend/src/admin/InstructorsView.jsx
@@ -0,0 +1,180 @@
+import { useState, useEffect, useCallback } from 'react'
+import { adminApi } from './api'
+import styles from './Admin.module.css'
+
+// Owner-only — the server enforces this too (requireOwner on every /api/admin/instructors*
+// route); this component is only ever mounted for an owner, but the backend never trusts that.
+export default function InstructorsView({ currentInstructorId }) {
+  const [instructors, setInstructors] = useState(null)
+  const [selected, setSelected] = useState(null)
+  const [error, setError] = useState(null)
+
+  const reload = useCallback(() => {
+    adminApi.instructors().then(setInstructors).catch((e) => setError(e.message))
+  }, [])
+  useEffect(reload, [reload])
+
+  if (selected) return <InstructorDetail instructorId={selected} isSelf={selected === currentInstructorId} onBack={() => { setSelected(null); reload() }} />
+
+  return (
+    <>
+      {error && <div className={styles.errorBox}>{error}</div>}
+      <div className={styles.card}>
+        <h2>Add instructor</h2>
+        <CreateInstructorForm onCreated={reload} />
+      </div>
+      <div className={styles.card}>
+        <h2>Instructors</h2>
+        {!instructors ? <p className={styles.muted}>Loading…</p> : (
+          <table>
+            <thead><tr><th>Name</th><th>Email</th><th>Role</th><th>Status</th><th>Last login</th><th /></tr></thead>
+            <tbody>
+              {instructors.map((i) => (
+                <tr key={i.instructor_id}>
+                  <td>{i.display_name}</td>
+                  <td>{i.email}</td>
+                  <td><span className={styles.pill}>{i.role}</span></td>
+                  <td><span className={`${styles.pill} ${i.status === 'active' ? styles.pillOk : styles.pillMuted}`}>{i.status}</span></td>
+                  <td>{i.last_login_at ? new Date(i.last_login_at).toLocaleString() : 'never'}</td>
+                  <td><button className={styles.linkBtn} onClick={() => setSelected(i.instructor_id)}>Open</button></td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        )}
+      </div>
+    </>
+  )
+}
+
+function CreateInstructorForm({ onCreated }) {
+  const [form, setForm] = useState({ email: '', display_name: '', role: 'instructor', password: '' })
+  const [error, setError] = useState(null)
+  const [busy, setBusy] = useState(false)
+
+  const submit = async (e) => {
+    e.preventDefault()
+    setBusy(true); setError(null)
+    try {
+      await adminApi.createInstructor(form)
+      setForm({ email: '', display_name: '', role: 'instructor', password: '' })
+      onCreated()
+    } catch (e) { setError(e.message) } finally { setBusy(false) }
+  }
+
+  return (
+    <form onSubmit={submit}>
+      {error && <div className={styles.errorBox}>{error}</div>}
+      <div className={styles.formRow}>
+        <div><label className={styles.label}>Name</label>
+          <input className={styles.input} value={form.display_name} onChange={(e) => setForm({ ...form, display_name: e.target.value })} required /></div>
+        <div><label className={styles.label}>Email</label>
+          <input className={styles.input} type="email" value={form.email} onChange={(e) => setForm({ ...form, email: e.target.value })} required /></div>
+        <div><label className={styles.label}>Role</label>
+          <select className={styles.select} value={form.role} onChange={(e) => setForm({ ...form, role: e.target.value })}>
+            <option value="instructor">instructor</option>
+            <option value="admin">admin</option>
+            <option value="owner">owner</option>
+          </select></div>
+        <div><label className={styles.label}>Temporary password (12+ chars)</label>
+          <input className={styles.input} type="password" value={form.password} onChange={(e) => setForm({ ...form, password: e.target.value })} required minLength={12} /></div>
+        <div><button className={styles.btn} disabled={busy}>{busy ? 'Adding…' : 'Add instructor'}</button></div>
+      </div>
+    </form>
+  )
+}
+
+function InstructorDetail({ instructorId, isSelf, onBack }) {
+  const [instructor, setInstructor] = useState(null)
+  const [error, setError] = useState(null)
+  const [notice, setNotice] = useState(null)
+  const [busy, setBusy] = useState(false)
+  const [newPassword, setNewPassword] = useState('')
+
+  const reload = useCallback(() => {
+    adminApi.instructor(instructorId).then(setInstructor).catch((e) => setError(e.message))
+  }, [instructorId])
+  useEffect(reload, [reload])
+
+  const updateRole = async (role) => {
+    setBusy(true); setError(null); setNotice(null)
+    try { await adminApi.updateInstructor(instructorId, { role }); reload() }
+    catch (e) { setError(e.message) } finally { setBusy(false) }
+  }
+
+  const toggleStatus = async () => {
+    const status = instructor.status === 'active' ? 'inactive' : 'active'
+    setBusy(true); setError(null); setNotice(null)
+    try { await adminApi.updateInstructor(instructorId, { status }); reload() }
+    catch (e) { setError(e.message) } finally { setBusy(false) }
+  }
+
+  const revokeSessions = async () => {
+    setBusy(true); setError(null)
+    try { await adminApi.revokeInstructorSessions(instructorId); setNotice('All sessions revoked.'); reload() }
+    catch (e) { setError(e.message) } finally { setBusy(false) }
+  }
+
+  const resetPassword = async (e) => {
+    e.preventDefault()
+    setBusy(true); setError(null); setNotice(null)
+    try { await adminApi.resetInstructorPassword(instructorId, newPassword); setNewPassword(''); setNotice('Password reset. All of their sessions were revoked.') }
+    catch (e) { setError(e.message) } finally { setBusy(false) }
+  }
+
+  if (!instructor) return error ? <div className={styles.errorBox}>{error}</div> : <p className={styles.muted}>Loading…</p>
+
+  return (
+    <>
+      <button className={styles.linkBtn} onClick={onBack}>&larr; Back to instructors</button>
+      <h2 style={{ margin: '1rem 0' }}>{instructor.display_name} <span className={styles.muted}>({instructor.email})</span></h2>
+      {error && <div className={styles.errorBox}>{error}</div>}
+      {notice && <p className={styles.muted}>{notice}</p>}
+
+      <div className={styles.card}>
+        <h3>Role &amp; status</h3>
+        <div className={styles.formRow}>
+          <div><label className={styles.label}>Role</label>
+            <select className={styles.select} value={instructor.role} onChange={(e) => updateRole(e.target.value)} disabled={busy}>
+              <option value="instructor">instructor</option>
+              <option value="admin">admin</option>
+              <option value="owner">owner</option>
+            </select></div>
+          <div><button className={instructor.status === 'active' ? styles.btnDanger : styles.btnSecondary} onClick={toggleStatus} disabled={busy}>
+            {instructor.status === 'active' ? 'Deactivate' : 'Activate'}
+          </button></div>
+        </div>
+        {isSelf && <p className={styles.muted}>This is your own account — the platform refuses to remove the last active owner, whichever account that is.</p>}
+      </div>
+
+      <div className={styles.card}>
+        <h3>Sessions</h3>
+        <p className={styles.muted}>Last login: {instructor.last_login_at ? new Date(instructor.last_login_at).toLocaleString() : 'never'}</p>
+        {instructor.sessions?.length ? (
+          <table>
+            <thead><tr><th>Created</th><th>Last active</th><th>Expires</th><th>Status</th></tr></thead>
+            <tbody>
+              {instructor.sessions.map((s) => (
+                <tr key={s.session_id}>
+                  <td>{new Date(s.created_at).toLocaleString()}</td>
+                  <td>{new Date(s.last_seen_at).toLocaleString()}</td>
+                  <td>{new Date(s.expires_at).toLocaleString()}</td>
+                  <td>{s.revoked_at ? <span className={`${styles.pill} ${styles.pillMuted}`}>revoked</span> : <span className={`${styles.pill} ${styles.pillOk}`}>active</span>}</td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        ) : <p className={styles.muted}>No sessions on record.</p>}
+        <button className={styles.btnDanger} style={{ marginTop: '0.75rem' }} onClick={revokeSessions} disabled={busy}>Revoke all sessions</button>
+      </div>
+
+      <div className={styles.card}>
+        <h3>Reset password</h3>
+        <form onSubmit={resetPassword} className={styles.formRow}>
+          <div><input className={styles.input} type="password" placeholder="New password (12+ chars)" value={newPassword} onChange={(e) => setNewPassword(e.target.value)} minLength={12} required /></div>
+          <div><button className={styles.btn} disabled={busy}>Set new password</button></div>
+        </form>
+      </div>
+    </>
+  )
+}