diff --git a/templates/page-master-edit-trainer-profile.php b/templates/page-master-edit-trainer-profile.php
index 91b5c582..8dbe967c 100644
--- a/templates/page-master-edit-trainer-profile.php
+++ b/templates/page-master-edit-trainer-profile.php
@@ -23,7 +23,7 @@ if (class_exists('HVAC_Master_Menu_System')) {
 
 // Render breadcrumbs
 if (class_exists('HVAC_Breadcrumbs')) {
-    HVAC_Breadcrumbs::render();
+    echo HVAC_Breadcrumbs::instance()->render_breadcrumbs();
 }
 
 echo '<div class="hvac-page-wrapper hvac-master-edit-trainer-profile-page">';
@@ -62,14 +62,21 @@ echo '<div class="container">';
     </div>
     
     <script>
+    // Make currentTrainerId globally accessible
+    window.currentTrainerId = null;
+    
     jQuery(document).ready(function($) {
+        
         $('#select-trainer').on('change', function() {
             var trainerId = $(this).val();
             if (!trainerId) {
                 $('#trainer-profile-edit-form').hide();
+                window.currentTrainerId = null;
                 return;
             }
             
+            window.currentTrainerId = trainerId;
+            
             // Load trainer profile for editing
             $('#trainer-profile-edit-form').html('<p>Loading trainer profile...</p>').show();
             
@@ -119,22 +126,79 @@ echo '<div class="container">';
                     </div>
                     
                     <div class="form-section">
-                        <h3>Certification Status</h3>
-                        <div class="form-group">
-                            <label>Certification Type</label>
-                            <select name="certification_type">
-                                <option>Certified measureQuick Trainer</option>
-                                <option>Certified measureQuick Champion</option>
-                            </select>
+                        <h3>Certifications Management</h3>
+                        <div class="certifications-manager">
+                            <div class="certifications-list" id="certifications-list">
+                                <!-- Existing certifications will be loaded here -->
+                            </div>
+                            
+                            <button type="button" class="button add-certification-btn" id="add-certification-btn">
+                                <span class="dashicons dashicons-plus"></span> Add New Certification
+                            </button>
                         </div>
-                        <div class="form-group">
-                            <label>Certification Status</label>
-                            <select name="certification_status">
-                                <option>Active</option>
-                                <option>Expired</option>
-                                <option>Pending</option>
-                                <option>Disabled</option>
-                            </select>
+                    </div>
+                    
+                    <!-- Certification Form Modal -->
+                    <div id="certification-modal" class="hvac-modal" style="display: none;">
+                        <div class="hvac-modal-content">
+                            <div class="hvac-modal-header">
+                                <h3 id="certification-modal-title">Add New Certification</h3>
+                                <button type="button" class="hvac-modal-close" id="close-certification-modal">
+                                    <span class="dashicons dashicons-no"></span>
+                                </button>
+                            </div>
+                            
+                            <form id="certification-form" class="hvac-certification-form">
+                                <input type="hidden" id="certification-id" name="certification_id" value="">
+                                <input type="hidden" id="trainer-user-id" name="trainer_user_id" value="">
+                                
+                                <div class="form-group">
+                                    <label for="cert-type">Certification Type *</label>
+                                    <select id="cert-type" name="certification_type" required>
+                                        <option value="">-- Select Type --</option>
+                                        <option value="measureQuick Certified Trainer">measureQuick Certified Trainer</option>
+                                        <option value="measureQuick Certified Champion">measureQuick Certified Champion</option>
+                                    </select>
+                                </div>
+                                
+                                <div class="form-group">
+                                    <label for="cert-status">Status *</label>
+                                    <select id="cert-status" name="status" required>
+                                        <option value="active">Active</option>
+                                        <option value="expired">Expired</option>
+                                        <option value="suspended">Suspended</option>
+                                        <option value="revoked">Revoked</option>
+                                    </select>
+                                </div>
+                                
+                                <div class="form-group">
+                                    <label for="cert-number">Certificate Number</label>
+                                    <input type="text" id="cert-number" name="certificate_number" placeholder="e.g., MQT-2024-001">
+                                </div>
+                                
+                                <div class="form-group">
+                                    <label for="issue-date">Issue Date</label>
+                                    <input type="date" id="issue-date" name="issue_date">
+                                </div>
+                                
+                                <div class="form-group">
+                                    <label for="expiration-date">Expiration Date</label>
+                                    <input type="date" id="expiration-date" name="expiration_date">
+                                </div>
+                                
+                                <div class="form-group">
+                                    <label for="cert-notes">Notes</label>
+                                    <textarea id="cert-notes" name="notes" rows="3" placeholder="Optional notes about this certification"></textarea>
+                                </div>
+                                
+                                <div class="hvac-modal-actions">
+                                    <button type="submit" class="button button-primary" id="save-certification-btn">
+                                        <span class="certification-save-text">Save Certification</span>
+                                        <span class="certification-save-loading" style="display: none;">Saving...</span>
+                                    </button>
+                                    <button type="button" class="button" id="cancel-certification-btn">Cancel</button>
+                                </div>
+                            </form>
                         </div>
                     </div>
                     
@@ -166,15 +230,431 @@ echo '<div class="container">';
             
             $('#trainer-profile-edit-form').html(formHtml);
             $('#trainer-name').text($('#select-trainer option:selected').text());
+            
+            // Set the trainer user ID for certification management
+            $('#trainer-user-id').val(trainerId);
+            
+            // Load existing certifications
+            loadTrainerCertifications(trainerId);
         });
         
         // Cancel button handler
         $(document).on('click', '.cancel-edit', function() {
             $('#select-trainer').val('');
             $('#trainer-profile-edit-form').hide();
+            window.currentTrainerId = null;
+        });
+        
+        // Certification Management Functions
+        function loadTrainerCertifications(trainerId) {
+            const certificationsList = $('#certifications-list');
+            certificationsList.html('<p>Loading certifications...</p>');
+            
+            // Mock AJAX call - in production this would fetch from the server
+            // For demo purposes, show some example certifications
+            setTimeout(function() {
+                const mockCertifications = [
+                    {
+                        id: 1,
+                        certification_type: 'measureQuick Certified Trainer',
+                        status: 'active',
+                        certificate_number: 'MQT-2024-001',
+                        issue_date: '2024-01-15',
+                        expiration_date: '2026-01-15',
+                        notes: 'Initial certification'
+                    },
+                    {
+                        id: 2,
+                        certification_type: 'measureQuick Certified Champion',
+                        status: 'active',
+                        certificate_number: 'MQC-2024-015',
+                        issue_date: '2024-06-01',
+                        expiration_date: '2025-01-15',
+                        notes: 'Advanced certification'
+                    }
+                ];
+                
+                renderCertificationsList(mockCertifications);
+            }, 500);
+        }
+        
+        function renderCertificationsList(certifications) {
+            const certificationsList = $('#certifications-list');
+            
+            if (!certifications || certifications.length === 0) {
+                certificationsList.html('<p class="no-certifications">No certifications found. Click "Add New Certification" to get started.</p>');
+                return;
+            }
+            
+            let html = '<div class="certifications-grid">';
+            
+            certifications.forEach(function(cert) {
+                const statusClass = cert.status === 'active' ? 'status-active' : 
+                                  cert.status === 'expired' ? 'status-expired' : 
+                                  cert.status === 'suspended' ? 'status-suspended' : 
+                                  'status-revoked';
+                
+                const isExpired = cert.expiration_date && new Date(cert.expiration_date) < new Date();
+                const displayStatus = isExpired ? 'Expired' : cert.status.charAt(0).toUpperCase() + cert.status.slice(1);
+                
+                html += `
+                    <div class="certification-item" data-certification-id="${cert.id}">
+                        <div class="certification-header">
+                            <h4>${cert.certification_type}</h4>
+                            <div class="certification-actions">
+                                <button type="button" class="button button-small edit-certification" data-id="${cert.id}">
+                                    <span class="dashicons dashicons-edit"></span> Edit
+                                </button>
+                                <button type="button" class="button button-small button-link-delete delete-certification" data-id="${cert.id}">
+                                    <span class="dashicons dashicons-trash"></span> Delete
+                                </button>
+                            </div>
+                        </div>
+                        <div class="certification-details">
+                            <span class="certification-status ${statusClass}">${displayStatus}</span>
+                            ${cert.certificate_number ? `<span class="certification-number">No. ${cert.certificate_number}</span>` : ''}
+                            ${cert.issue_date ? `<span class="certification-date">Issued: ${formatDate(cert.issue_date)}</span>` : ''}
+                            ${cert.expiration_date ? `<span class="certification-expiry">Expires: ${formatDate(cert.expiration_date)}</span>` : ''}
+                        </div>
+                        ${cert.notes ? `<div class="certification-notes">${cert.notes}</div>` : ''}
+                    </div>
+                `;
+            });
+            
+            html += '</div>';
+            certificationsList.html(html);
+        }
+        
+        function formatDate(dateString) {
+            if (!dateString) return '';
+            const date = new Date(dateString);
+            return date.toLocaleDateString('en-US', { 
+                year: 'numeric', 
+                month: 'short', 
+                day: 'numeric' 
+            });
+        }
+        
+        // Add New Certification - Using vanilla JavaScript since jQuery might not be loaded yet
+        document.addEventListener('click', function(e) {
+            if (e.target && e.target.id === 'add-certification-btn') {
+                e.preventDefault();
+                
+                if (!window.currentTrainerId) return;
+                
+                // Reset form
+                const form = document.getElementById('certification-form');
+                if (form) {
+                    form.reset();
+                }
+                
+                const certId = document.getElementById('certification-id');
+                if (certId) certId.value = '';
+                
+                const trainerUserId = document.getElementById('trainer-user-id');
+                if (trainerUserId) trainerUserId.value = window.currentTrainerId;
+                
+                const modalTitle = document.getElementById('certification-modal-title');
+                if (modalTitle) modalTitle.textContent = 'Add New Certification';
+                
+                // Show modal using vanilla JavaScript with fade effect
+                const modal = document.getElementById('certification-modal');
+                if (modal) {
+                    modal.style.display = 'flex';
+                    modal.style.opacity = '0';
+                    modal.style.transition = 'opacity 0.3s ease-in-out';
+                    
+                    // Force reflow then animate
+                    modal.offsetHeight;
+                    modal.style.opacity = '1';
+                }
+            }
+        });
+        
+        // Edit Certification
+        $(document).on('click', '.edit-certification', function() {
+            const certId = $(this).data('id');
+            
+            // In production, this would fetch the certification data via AJAX
+            // For demo, we'll populate with example data
+            $('#certification-id').val(certId);
+            $('#trainer-user-id').val(window.currentTrainerId);
+            $('#cert-type').val('measureQuick Certified Trainer');
+            $('#cert-status').val('active');
+            $('#cert-number').val('MQT-2024-001');
+            $('#issue-date').val('2024-01-15');
+            $('#expiration-date').val('2026-01-15');
+            $('#cert-notes').val('Initial certification');
+            
+            $('#certification-modal-title').text('Edit Certification');
+            $('#certification-modal').fadeIn(300);
+        });
+        
+        // Delete Certification
+        $(document).on('click', '.delete-certification', function() {
+            const certId = $(this).data('id');
+            
+            if (confirm('Are you sure you want to delete this certification? This action cannot be undone.')) {
+                // In production, this would make an AJAX call to delete
+                $(`.certification-item[data-certification-id="${certId}"]`).fadeOut(function() {
+                    $(this).remove();
+                    
+                    // Check if no certifications remain
+                    if ($('.certification-item').length === 0) {
+                        $('#certifications-list').html('<p class="no-certifications">No certifications found. Click "Add New Certification" to get started.</p>');
+                    }
+                });
+            }
+        });
+        
+        // Close Certification Modal - Using vanilla JavaScript
+        document.addEventListener('click', function(e) {
+            if (e.target && (e.target.id === 'close-certification-modal' || e.target.id === 'cancel-certification-btn' || e.target.classList.contains('hvac-modal-close'))) {
+                e.preventDefault();
+                
+                const modal = document.getElementById('certification-modal');
+                if (modal) {
+                    modal.style.transition = 'opacity 0.3s ease-in-out';
+                    modal.style.opacity = '0';
+                    
+                    // Hide modal after fade out
+                    setTimeout(() => {
+                        modal.style.display = 'none';
+                    }, 300);
+                }
+            }
+        });
+        
+        // Save Certification Form
+        $('#certification-form').on('submit', function(e) {
+            e.preventDefault();
+            
+            const saveBtn = $('#save-certification-btn');
+            const saveText = $('.certification-save-text');
+            const saveLoading = $('.certification-save-loading');
+            
+            // Show loading state
+            saveBtn.prop('disabled', true);
+            saveText.hide();
+            saveLoading.show();
+            
+            // Get form data
+            const formData = new FormData(this);
+            const certData = Object.fromEntries(formData.entries());
+            
+            // Simulate AJAX save
+            setTimeout(function() {
+                // In production, this would be a real AJAX call
+                console.log('Saving certification data:', certData);
+                
+                // Reset loading state
+                saveBtn.prop('disabled', false);
+                saveText.show();
+                saveLoading.hide();
+                
+                // Close modal
+                $('#certification-modal').fadeOut(300);
+                
+                // Reload certifications list
+                loadTrainerCertifications(window.currentTrainerId);
+                
+                // Show success message
+                alert('Certification saved successfully!');
+                
+            }, 1000);
+        });
+        
+        // Click outside modal to close
+        $(document).on('click', '.hvac-modal', function(e) {
+            if ($(e.target).is('.hvac-modal')) {
+                $(this).fadeOut(300);
+            }
         });
     });
     </script>
+    
+    <style>
+    /* Certification Management Styles */
+    .certifications-manager {
+        margin-top: 15px;
+    }
+    
+    .certifications-grid {
+        display: grid;
+        gap: 15px;
+        margin-bottom: 20px;
+    }
+    
+    .certification-item {
+        border: 1px solid #ddd;
+        border-radius: 4px;
+        padding: 15px;
+        background: #f9f9f9;
+    }
+    
+    .certification-header {
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        margin-bottom: 10px;
+    }
+    
+    .certification-header h4 {
+        margin: 0;
+        font-size: 16px;
+    }
+    
+    .certification-actions {
+        display: flex;
+        gap: 5px;
+    }
+    
+    .certification-actions .button {
+        padding: 4px 8px;
+        font-size: 12px;
+    }
+    
+    .certification-details {
+        display: flex;
+        flex-wrap: wrap;
+        gap: 15px;
+        margin-bottom: 10px;
+    }
+    
+    .certification-details > span {
+        font-size: 13px;
+        padding: 2px 6px;
+        border-radius: 3px;
+        background: #fff;
+        border: 1px solid #ddd;
+    }
+    
+    .certification-status.status-active {
+        background: #d4edda;
+        border-color: #c3e6cb;
+        color: #155724;
+    }
+    
+    .certification-status.status-expired {
+        background: #f8d7da;
+        border-color: #f5c6cb;
+        color: #721c24;
+    }
+    
+    .certification-status.status-suspended {
+        background: #fff3cd;
+        border-color: #ffeaa7;
+        color: #856404;
+    }
+    
+    .certification-status.status-revoked {
+        background: #f8d7da;
+        border-color: #f5c6cb;
+        color: #721c24;
+    }
+    
+    .certification-notes {
+        font-style: italic;
+        color: #666;
+        margin-top: 10px;
+        font-size: 13px;
+    }
+    
+    .no-certifications {
+        text-align: center;
+        color: #666;
+        font-style: italic;
+        padding: 20px;
+        background: #f9f9f9;
+        border: 1px dashed #ccc;
+        border-radius: 4px;
+    }
+    
+    .add-certification-btn {
+        display: inline-flex;
+        align-items: center;
+        gap: 5px;
+    }
+    
+    /* Modal Styles */
+    .hvac-modal {
+        position: fixed;
+        top: 0;
+        left: 0;
+        width: 100%;
+        height: 100%;
+        background: rgba(0, 0, 0, 0.5);
+        z-index: 9999;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+    }
+    
+    .hvac-modal-content {
+        background: white;
+        border-radius: 4px;
+        width: 500px;
+        max-width: 90vw;
+        max-height: 90vh;
+        overflow-y: auto;
+    }
+    
+    .hvac-modal-header {
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        padding: 20px;
+        border-bottom: 1px solid #ddd;
+    }
+    
+    .hvac-modal-header h3 {
+        margin: 0;
+    }
+    
+    .hvac-modal-close {
+        background: none;
+        border: none;
+        cursor: pointer;
+        font-size: 18px;
+        color: #666;
+    }
+    
+    .hvac-certification-form {
+        padding: 20px;
+    }
+    
+    .hvac-certification-form .form-group {
+        margin-bottom: 15px;
+    }
+    
+    .hvac-certification-form label {
+        display: block;
+        margin-bottom: 5px;
+        font-weight: bold;
+    }
+    
+    .hvac-certification-form input,
+    .hvac-certification-form select,
+    .hvac-certification-form textarea {
+        width: 100%;
+        padding: 8px;
+        border: 1px solid #ddd;
+        border-radius: 4px;
+    }
+    
+    .hvac-modal-actions {
+        display: flex;
+        gap: 10px;
+        justify-content: flex-end;
+        margin-top: 20px;
+        padding-top: 20px;
+        border-top: 1px solid #ddd;
+    }
+    
+    .certification-save-loading {
+        display: none;
+    }
+    </style>
 </div>
 
 <?php