diff --git a/kwa-ui/src/components/RequirementsTreeList.vue b/kwa-ui/src/components/RequirementsTreeList.vue
new file mode 100644
index 0000000..edbdbfc
--- /dev/null
+++ b/kwa-ui/src/components/RequirementsTreeList.vue
@@ -0,0 +1,332 @@
+<script setup lang="ts">
+import { computed, ref } from 'vue'
+import InputText from 'primevue/inputtext'
+import Tree from 'primevue/tree'
+import Tag from 'primevue/tag'
+
+export interface Requirement {
+  id: number
+  reference: string
+  title: string
+  status: 'Draft' | 'In Review' | 'Approved' | 'Blocked' | 'Delivered'
+  priority: 'Low' | 'Medium' | 'High' | 'Critical'
+  owner: string
+  progress: number
+  dueDate: string
+  description: string
+  rationale: string
+  acceptanceCriteria: string[]
+  impactedModules: string[]
+  blockers: string[]
+  notes: string
+}
+
+export interface TreeNode {
+  key: string
+  label?: string
+  data?: Requirement
+  children?: TreeNode[]
+  icon?: string
+}
+
+interface Props {
+  treeData: TreeNode[]
+  searchQuery: string
+  selectedId: number
+  stats: {
+    total: number
+    approvedCount: number
+    blockedCount: number
+    criticalCount: number
+  }
+}
+
+interface Emits {
+  (e: 'update:searchQuery', value: string): void
+  (e: 'update:selectedId', value: number): void
+}
+
+const props = defineProps<Props>()
+const emit = defineEmits<Emits>()
+
+const expandedKeys = ref<Record<string, boolean>>({
+  'SECT-ELE': true,
+  'SECT-INFO': true,
+  'SECT-MEC': true,
+})
+
+const selectedKey = ref<string>('101')
+
+const filteredTreeData = computed(() => {
+  const query = props.searchQuery.trim().toLowerCase()
+
+  if (!query) {
+    return props.treeData
+  }
+
+  const filterNode = (node: TreeNode): TreeNode | null => {
+    const matchesFilter =
+      node.label?.toLowerCase().includes(query) ||
+      (node.data?.reference.toLowerCase().includes(query) ?? false) ||
+      (node.data?.owner.toLowerCase().includes(query) ?? false)
+
+    const childrenMatch = node.children
+      ?.map((child) => filterNode(child))
+      .filter((child) => child !== null) as TreeNode[]
+
+    if (matchesFilter || (childrenMatch && childrenMatch.length > 0)) {
+      return {
+        ...node,
+        children: childrenMatch && childrenMatch.length > 0 ? childrenMatch : node.children,
+      }
+    }
+
+    return null
+  }
+
+  return props.treeData
+    .map((node) => filterNode(node))
+    .filter((node) => node !== null) as TreeNode[]
+})
+
+const statusSeverity = (status: Requirement['status']) => {
+  const map: Record<
+    Requirement['status'],
+    'secondary' | 'info' | 'success' | 'danger' | 'contrast'
+  > = {
+    Draft: 'secondary',
+    'In Review': 'info',
+    Approved: 'success',
+    Blocked: 'danger',
+    Delivered: 'contrast',
+  }
+  return map[status]
+}
+
+const prioritySeverity = (priority: Requirement['priority']) => {
+  const map: Record<Requirement['priority'], 'success' | 'info' | 'warn' | 'danger'> = {
+    Low: 'success',
+    Medium: 'info',
+    High: 'warn',
+    Critical: 'danger',
+  }
+  return map[priority]
+}
+
+const onNodeSelect = (node: TreeNode) => {
+  if (node.data?.id) {
+    emit('update:selectedId', node.data.id)
+    selectedKey.value = node.key
+  }
+}
+</script>
+
+<template>
+  <aside class="requirements-tree">
+    <div class="stats-bar">
+      <div class="stat-item">
+        <span class="stat-label">Total</span>
+        <strong>{{ stats.total }}</strong>
+      </div>
+      <div class="stat-item">
+        <span class="stat-label">Approved</span>
+        <strong>{{ stats.approvedCount }}</strong>
+      </div>
+      <div class="stat-item">
+        <span class="stat-label">Blocked</span>
+        <strong>{{ stats.blockedCount }}</strong>
+      </div>
+      <div class="stat-item">
+        <span class="stat-label">Critical</span>
+        <strong>{{ stats.criticalCount }}</strong>
+      </div>
+    </div>
+
+    <span class="search-field">
+      <InputText
+        :value="searchQuery"
+        @input="(event) => $emit('update:searchQuery', (event.target as HTMLInputElement).value)"
+        placeholder="Filter by title, ref, owner..."
+      />
+    </span>
+
+    <div class="tree-container">
+      <Tree
+        :value="filteredTreeData"
+        :expanded-keys="expandedKeys"
+        @node-select="(node) => onNodeSelect(node)"
+        selection-mode="single"
+        :selection-keys="{ [selectedKey]: true }"
+        @update:expanded-keys="(keys) => (expandedKeys = keys)"
+        class="requirements-tree-view"
+      >
+        <template #default="{ node }">
+          <div class="tree-node-content">
+            <span class="node-label">{{ node.label }}</span>
+            <div v-if="node.data" class="node-tags">
+              <Tag :value="node.data.status" :severity="statusSeverity(node.data.status)" />
+              <Tag
+                :value="node.data.priority"
+                :severity="prioritySeverity(node.data.priority)"
+                rounded
+              />
+            </div>
+          </div>
+        </template>
+      </Tree>
+    </div>
+  </aside>
+</template>
+
+<style scoped>
+.requirements-tree {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+  padding: 1rem;
+  border: 1px solid rgba(96, 117, 156, 0.16);
+  border-radius: 1.5rem;
+  background: rgba(255, 255, 255, 0.86);
+  box-shadow: 0 24px 60px rgba(34, 49, 77, 0.12);
+  backdrop-filter: blur(18px);
+  height: 100%;
+  overflow: hidden;
+}
+
+.stats-bar {
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 0.5rem;
+  padding-bottom: 0.5rem;
+  border-bottom: 1px solid rgba(96, 117, 156, 0.12);
+}
+
+.stat-item {
+  display: flex;
+  flex-direction: column;
+  gap: 0.2rem;
+  text-align: center;
+}
+
+.stat-label {
+  display: block;
+  color: #667690;
+  font-size: 0.7rem;
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+}
+
+.stat-item strong {
+  color: #12213a;
+  font-size: 0.95rem;
+}
+
+.search-field {
+  width: 100%;
+  flex-shrink: 0;
+}
+
+.search-field :is(.p-inputtext) {
+  width: 100%;
+  border-radius: 0.8rem;
+  padding-left: 0.85rem;
+  font-size: 0.9rem;
+}
+
+.tree-container {
+  flex: 1;
+  min-height: 0;
+  overflow-y: auto;
+  border-radius: 0.8rem;
+}
+
+.requirements-tree-view {
+  width: 100%;
+  border: none;
+  background: transparent;
+}
+
+.requirements-tree-view :deep(.p-tree) {
+  background: transparent;
+  border: none;
+}
+
+.requirements-tree-view :deep(.p-tree-container) {
+  background: transparent;
+}
+
+.requirements-tree-view :deep(.p-treenode) {
+  padding: 0;
+}
+
+.requirements-tree-view :deep(.p-treenode-content) {
+  padding: 0.5rem 0.5rem;
+  border-radius: 0.6rem;
+  transition: background-color 0.2s ease;
+}
+
+.requirements-tree-view :deep(.p-treenode-content:hover) {
+  background-color: rgba(78, 107, 255, 0.08);
+}
+
+.requirements-tree-view :deep(.p-treenode-content.p-treenode-selected) {
+  background-color: rgba(78, 107, 255, 0.16);
+  color: #12213a;
+}
+
+.tree-node-content {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.75rem;
+  width: 100%;
+}
+
+.node-label {
+  flex: 1;
+  font-size: 0.85rem;
+  color: #12213a;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.node-tags {
+  display: flex;
+  gap: 0.3rem;
+  flex-shrink: 0;
+}
+
+.node-tags :deep(.p-tag) {
+  font-size: 0.7rem;
+  padding: 0.25rem 0.5rem;
+}
+
+@media (max-width: 760px) {
+  .stats-bar {
+    grid-template-columns: repeat(2, 1fr);
+  }
+
+  .requirements-tree {
+    padding: 0.75rem;
+    gap: 0.5rem;
+  }
+
+  .search-field :is(.p-inputtext) {
+    font-size: 0.85rem;
+    padding-left: 0.75rem;
+  }
+
+  .node-label {
+    font-size: 0.8rem;
+  }
+
+  .stat-label {
+    font-size: 0.65rem;
+  }
+
+  .stat-item strong {
+    font-size: 0.85rem;
+  }
+}
+</style>
diff --git a/kwa-ui/src/views/RequirementsView.vue b/kwa-ui/src/views/RequirementsView.vue
index c445c50..6fb7a8d 100644
--- a/kwa-ui/src/views/RequirementsView.vue
+++ b/kwa-ui/src/views/RequirementsView.vue
@@ -1,10 +1,12 @@
 <script setup lang="ts">
-import { computed, ref, watch } from 'vue'
+import { computed, ref } from 'vue'
 
 import Button from 'primevue/button'
-import RequirementsList from '../components/RequirementsList.vue'
+import RequirementsTreeList from '../components/RequirementsTreeList.vue'
 import RequirementDetail from '../components/RequirementDetail.vue'
 
+import type { TreeNode } from '../components/RequirementsTreeList.vue'
+
 type RequirementStatus = 'Draft' | 'In Review' | 'Approved' | 'Blocked' | 'Delivered'
 type RequirementPriority = 'Low' | 'Medium' | 'High' | 'Critical'
 
@@ -25,7 +27,8 @@ interface Requirement {
   notes: string
 }
 
-const requirements: Requirement[] = [
+// All requirements data
+const allRequirements: Requirement[] = [
   {
     id: 101,
     reference: 'REQ-101',
@@ -116,51 +119,82 @@ const requirements: Requirement[] = [
   },
 ]
 
+// Helper function to create tree nodes from requirements
+const buildTreeData = (): TreeNode[] => {
+  return [
+    {
+      key: 'SECT-ELE',
+      label: 'Electronics',
+      icon: 'pi pi-fw pi-bolt',
+      children: [
+        {
+          key: '101',
+          label: `${allRequirements[0]!.reference} - ${allRequirements[0]!.title}`,
+          data: allRequirements[0]!,
+        },
+        {
+          key: '102-child',
+          label: 'Sub-requirement: Power management',
+          data: { ...allRequirements[1]!, id: 1021, reference: 'REQ-102.1' } as Requirement,
+        },
+      ],
+    },
+    {
+      key: 'SECT-INFO',
+      label: 'Software',
+      icon: 'pi pi-fw pi-code',
+      children: [
+        {
+          key: '102',
+          label: `${allRequirements[1]!.reference} - ${allRequirements[1]!.title}`,
+          data: allRequirements[1]!,
+        },
+        {
+          key: '103',
+          label: `${allRequirements[2]!.reference} - ${allRequirements[2]!.title}`,
+          data: allRequirements[2]!,
+        },
+      ],
+    },
+    {
+      key: 'SECT-MEC',
+      label: 'Mechanical',
+      icon: 'pi pi-fw pi-cog',
+      children: [
+        {
+          key: '104',
+          label: `${allRequirements[3]!.reference} - ${allRequirements[3]!.title}`,
+          data: allRequirements[3]!,
+        },
+      ],
+    },
+  ]
+}
+
+const treeData = buildTreeData()
 const searchQuery = ref('')
-const selectedId = ref(requirements[0]?.id ?? 0)
-const fallbackRequirement = requirements[0]!
-
-const filteredRequirements = computed(() => {
-  const query = searchQuery.value.trim().toLowerCase()
-
-  if (!query) {
-    return requirements
-  }
-
-  return requirements.filter((requirement) => {
-    return [
-      requirement.title,
-      requirement.reference,
-      requirement.owner,
-      requirement.status,
-      requirement.priority,
-    ]
-      .join(' ')
-      .toLowerCase()
-      .includes(query)
-  })
-})
+const selectedId = ref(101)
+const fallbackRequirement = allRequirements[0]!
 
 const selectedRequirement = computed<Requirement>(() => {
-  return requirements.find((requirement) => requirement.id === selectedId.value) ?? fallbackRequirement
+  const found = allRequirements.find((req) => req.id === selectedId.value)
+  return found ?? fallbackRequirement
 })
 
 const stats = computed(() => {
-  const total = requirements.length
-  const approvedCount = requirements.filter((requirement) => requirement.status === 'Approved').length
-  const blockedCount = requirements.filter((requirement) => requirement.status === 'Blocked').length
-  const criticalCount = requirements.filter((requirement) => requirement.priority === 'Critical').length
+  const total = allRequirements.length
+  const approvedCount = allRequirements.filter(
+    (requirement) => requirement.status === 'Approved'
+  ).length
+  const blockedCount = allRequirements.filter(
+    (requirement) => requirement.status === 'Blocked'
+  ).length
+  const criticalCount = allRequirements.filter(
+    (requirement) => requirement.priority === 'Critical'
+  ).length
 
   return { total, approvedCount, blockedCount, criticalCount }
 })
-
-watch(filteredRequirements, (items) => {
-  const firstItem = items[0]
-
-  if (firstItem && !items.some((item) => item.id === selectedId.value)) {
-    selectedId.value = firstItem.id
-  }
-})
 </script>
 
 <template>
@@ -170,8 +204,8 @@ watch(filteredRequirements, (items) => {
         <p class="eyebrow">Requirements management</p>
         <h1>Project requirements dashboard</h1>
         <p class="hero-card__text">
-          A focused interface to browse requirements, track progress, and display the business
-          details of the selected item.
+          A focused interface to browse requirements organized by section, track progress, and
+          display business details of the selected item.
         </p>
       </div>
 
@@ -182,9 +216,8 @@ watch(filteredRequirements, (items) => {
     </section>
 
     <section class="workspace">
-      <!-- Requirements list sidebar component -->
-      <RequirementsList
-        :requirements="requirements"
+      <RequirementsTreeList
+        :tree-data="treeData"
         :searchQuery="searchQuery"
         :selectedId="selectedId"
         :stats="stats"
@@ -192,7 +225,6 @@ watch(filteredRequirements, (items) => {
         @update:selectedId="selectedId = $event"
       />
 
-      <!-- Requirement detail component -->
       <RequirementDetail :requirement="selectedRequirement" />
     </section>
   </section>
@@ -252,7 +284,7 @@ watch(filteredRequirements, (items) => {
 
 .workspace {
   display: grid;
-  grid-template-columns: minmax(19rem, 24rem) minmax(0, 1fr);
+  grid-template-columns: minmax(18rem, 22rem) minmax(0, 1fr);
   gap: 1.5rem;
   align-items: start;
 }