diff --git a/client/src/components/EditEmployeeModal.jsx b/client/src/components/EditEmployeeModal.jsx
new file mode 100644
index 0000000..a438e1b
--- /dev/null
+++ b/client/src/components/EditEmployeeModal.jsx
@@ -0,0 +1,189 @@
+import React, { useState, useEffect } from 'react';
+import axios from 'axios';
+
+const s = {
+  overlay: {
+    position: 'fixed', inset: 0, background: 'rgba(0,0,0,0.8)',
+    zIndex: 2000, display: 'flex', alignItems: 'center', justifyContent: 'center',
+  },
+  modal: {
+    background: '#111217', color: '#f8f9fa', width: '480px', maxWidth: '95vw',
+    borderRadius: '10px', boxShadow: '0 8px 40px rgba(0,0,0,0.8)',
+    border: '1px solid #222', overflow: 'hidden',
+  },
+  header: {
+    background: 'linear-gradient(135deg, #000000, #151622)', color: 'white',
+    padding: '18px 22px', display: 'flex', alignItems: 'center', justifyContent: 'space-between',
+    borderBottom: '1px solid #222',
+  },
+  title: { fontSize: '15px', fontWeight: 700 },
+  closeBtn: {
+    background: 'none', border: 'none', color: 'white', fontSize: '20px',
+    cursor: 'pointer', lineHeight: 1,
+  },
+  body: { padding: '22px' },
+  tabs: { display: 'flex', gap: '4px', marginBottom: '20px' },
+  tab: (active) => ({
+    flex: 1, padding: '8px', borderRadius: '6px', cursor: 'pointer', fontSize: '12px',
+    fontWeight: 700, textAlign: 'center', border: '1px solid',
+    background: active ? '#1a1c2e' : 'none',
+    borderColor: active ? '#667eea' : '#2a2b3a',
+    color: active ? '#667eea' : '#777',
+  }),
+  label: { fontSize: '11px', color: '#9ca0b8', textTransform: 'uppercase', letterSpacing: '0.5px', marginBottom: '5px' },
+  input: {
+    width: '100%', background: '#0d0e14', border: '1px solid #2a2b3a', borderRadius: '6px',
+    color: '#f8f9fa', padding: '9px 12px', fontSize: '13px', marginBottom: '14px',
+    outline: 'none', boxSizing: 'border-box',
+  },
+  select: {
+    width: '100%', background: '#0d0e14', border: '1px solid #2a2b3a', borderRadius: '6px',
+    color: '#f8f9fa', padding: '9px 12px', fontSize: '13px', marginBottom: '14px',
+    outline: 'none', boxSizing: 'border-box',
+  },
+  row: { display: 'flex', gap: '10px', justifyContent: 'flex-end', marginTop: '6px' },
+  btn: (color, bg) => ({
+    padding: '8px 18px', borderRadius: '6px', fontWeight: 700, fontSize: '13px',
+    cursor: 'pointer', border: `1px solid ${color}`, color, background: bg || 'none',
+  }),
+  error: {
+    background: '#3c1114', border: '1px solid #f5c6cb', borderRadius: '6px',
+    padding: '10px 12px', fontSize: '12px', color: '#ffb3b8', marginBottom: '14px',
+  },
+  success: {
+    background: '#0a2e1f', border: '1px solid #0f5132', borderRadius: '6px',
+    padding: '10px 12px', fontSize: '12px', color: '#9ef7c1', marginBottom: '14px',
+  },
+  mergeWarning: {
+    background: '#2a1f00', border: '1px solid #7a5000', borderRadius: '6px',
+    padding: '12px', fontSize: '12px', color: '#ffc107', marginBottom: '14px', lineHeight: 1.5,
+  },
+};
+
+export default function EditEmployeeModal({ employee, onClose, onSaved }) {
+  const [tab, setTab] = useState('edit');
+
+  // Edit state
+  const [name, setName]             = useState(employee.name);
+  const [department, setDepartment] = useState(employee.department || '');
+  const [supervisor, setSupervisor] = useState(employee.supervisor || '');
+  const [editError, setEditError]   = useState('');
+  const [editSaving, setEditSaving] = useState(false);
+
+  // Merge state
+  const [allEmployees, setAllEmployees] = useState([]);
+  const [sourceId, setSourceId]         = useState('');
+  const [mergeError, setMergeError]     = useState('');
+  const [mergeResult, setMergeResult]   = useState(null);
+  const [merging, setMerging]           = useState(false);
+
+  useEffect(() => {
+    if (tab === 'merge') {
+      axios.get('/api/employees').then(r => setAllEmployees(r.data));
+    }
+  }, [tab]);
+
+  const handleEdit = async () => {
+    setEditError('');
+    setEditSaving(true);
+    try {
+      await axios.patch(`/api/employees/${employee.id}`, { name, department, supervisor });
+      onSaved();
+      onClose();
+    } catch (e) {
+      setEditError(e.response?.data?.error || 'Failed to save changes');
+    } finally {
+      setEditSaving(false);
+    }
+  };
+
+  const handleMerge = async () => {
+    if (!sourceId) return setMergeError('Select an employee to merge in');
+    setMergeError('');
+    setMerging(true);
+    try {
+      const r = await axios.post(`/api/employees/${employee.id}/merge`, { source_id: parseInt(sourceId) });
+      setMergeResult(r.data);
+      onSaved(); // refresh dashboard / parent list
+    } catch (e) {
+      setMergeError(e.response?.data?.error || 'Merge failed');
+    } finally {
+      setMerging(false);
+    }
+  };
+
+  const otherEmployees = allEmployees.filter(e => e.id !== employee.id);
+
+  return (
+    <div style={s.overlay} onClick={e => e.target === e.currentTarget && onClose()}>
+      <div style={s.modal}>
+        <div style={s.header}>
+          <div style={s.title}>Edit Employee</div>
+          <button style={s.closeBtn} onClick={onClose}>✕</button>
+        </div>
+        <div style={s.body}>
+          <div style={s.tabs}>
+            <button style={s.tab(tab === 'edit')}  onClick={() => setTab('edit')}>Edit Details</button>
+            <button style={s.tab(tab === 'merge')} onClick={() => setTab('merge')}>Merge Duplicate</button>
+          </div>
+
+          {tab === 'edit' && (
+            <>
+              {editError && <div style={s.error}>{editError}</div>}
+              <div style={s.label}>Full Name</div>
+              <input style={s.input} value={name} onChange={e => setName(e.target.value)} />
+              <div style={s.label}>Department</div>
+              <input style={s.input} value={department} onChange={e => setDepartment(e.target.value)} placeholder="Optional" />
+              <div style={s.label}>Supervisor</div>
+              <input style={s.input} value={supervisor} onChange={e => setSupervisor(e.target.value)} placeholder="Optional" />
+              <div style={s.row}>
+                <button style={s.btn('#888')} onClick={onClose}>Cancel</button>
+                <button style={s.btn('#fff', '#667eea')} onClick={handleEdit} disabled={editSaving}>
+                  {editSaving ? 'Saving…' : 'Save Changes'}
+                </button>
+              </div>
+            </>
+          )}
+
+          {tab === 'merge' && (
+            <>
+              {mergeResult ? (
+                <div style={s.success}>
+                  ✓ Merge complete — {mergeResult.violations_reassigned} violation{mergeResult.violations_reassigned !== 1 ? 's' : ''} reassigned
+                  to <strong>{employee.name}</strong>. The duplicate record has been removed.
+                </div>
+              ) : (
+                <>
+                  <div style={s.mergeWarning}>
+                    ⚠ This will reassign <strong>all violations</strong> from the selected employee into{' '}
+                    <strong>{employee.name}</strong>, then permanently delete the duplicate record.
+                    This cannot be undone.
+                  </div>
+                  {mergeError && <div style={s.error}>{mergeError}</div>}
+                  <div style={s.label}>Duplicate to merge into {employee.name}</div>
+                  <select style={s.select} value={sourceId} onChange={e => setSourceId(e.target.value)}>
+                    <option value="">— select employee —</option>
+                    {otherEmployees.map(e => (
+                      <option key={e.id} value={e.id}>{e.name}{e.department ? ` (${e.department})` : ''}</option>
+                    ))}
+                  </select>
+                  <div style={s.row}>
+                    <button style={s.btn('#888')} onClick={onClose}>Cancel</button>
+                    <button style={s.btn('#fff', '#c0392b')} onClick={handleMerge} disabled={merging || !sourceId}>
+                      {merging ? 'Merging…' : 'Merge & Delete Duplicate'}
+                    </button>
+                  </div>
+                </>
+              )}
+              {mergeResult && (
+                <div style={s.row}>
+                  <button style={s.btn('#fff', '#667eea')} onClick={onClose}>Done</button>
+                </div>
+              )}
+            </>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}