diff --git a/src/main/java/com/ffii/tsms/modules/project/entity/Project.kt b/src/main/java/com/ffii/tsms/modules/project/entity/Project.kt
index 54267e8..199b1fb 100644
--- a/src/main/java/com/ffii/tsms/modules/project/entity/Project.kt
+++ b/src/main/java/com/ffii/tsms/modules/project/entity/Project.kt
@@ -43,6 +43,10 @@ open class Project : BaseEntity<Long>() {
     @JoinColumn(name = "teamLead")
     open var teamLead: Staff? = null
 
+    @ManyToOne
+    @JoinColumn(name = "subTeamLead")
+    open var subTeamLead: Staff? = null
+
     @ManyToOne
     @JoinColumn(name = "customerId")
     open var customer: Customer? = null
diff --git a/src/main/java/com/ffii/tsms/modules/project/service/ProjectsService.kt b/src/main/java/com/ffii/tsms/modules/project/service/ProjectsService.kt
index 72a8a96..1e44803 100644
--- a/src/main/java/com/ffii/tsms/modules/project/service/ProjectsService.kt
+++ b/src/main/java/com/ffii/tsms/modules/project/service/ProjectsService.kt
@@ -186,6 +186,7 @@ open class ProjectsService(
             if (request.taskTemplateId != null && request.taskTemplateId > 0) taskTemplateRepository.findById(request.taskTemplateId)
                 .orElseThrow() else null
         val teamLead = staffRepository.findById(request.projectLeadId).orElseThrow()
+        val subTeamLead = request.projectSubLeadId?.let { staffRepository.findById(it).orElseThrow() }
         val customer = customerService.findCustomer(request.clientId)
         val customerType = request.clientTypeId?.let { customerService.findCustomerType(it) } ?: customer.customerType
         val subsidiaryContact =
@@ -261,6 +262,7 @@ open class ProjectsService(
             this.taskTemplate = taskTemplate
 
             this.teamLead = teamLead
+            this.subTeamLead = subTeamLead
             this.customer = customer
             custLeadName =
                 if (request.isSubsidiaryContact == null || !request.isSubsidiaryContact) clientContact?.name else subsidiaryContact?.name
@@ -425,6 +427,7 @@ open class ProjectsService(
                 projectCategoryId = it.projectCategory?.id,
                 projectDescription = it.description,
                 projectLeadId = it.teamLead?.id,
+                projectSubLeadId = it.subTeamLead?.id,
                 projectActualStart = it.actualStart,
                 projectActualEnd = it.actualEnd,
                 projectPlanStart = it.planStart,
@@ -497,8 +500,9 @@ open class ProjectsService(
     open fun allBuildingTypes(): List<BuildingType> {
          val sortedBuildingType = buildingTypeRepository.findAll().sortedBy { it.name }.sortedWith { a, b ->
             when {
+                a.contains("Hidden", ignoreCase = true) && !b.contains("Hidden", ignoreCase = true) -> 2
                 a.startsWith("Others") && !b.startsWith("Others") -> 1  // Move "Others" to the end
-                !a.startsWith("Others") && b.startsWith("Others") -> -1 // Keep non-"Others" items above
+                (!a.startsWith("Others") && b.startsWith("Others")) || (!a.contains("Hidden", ignoreCase = true) && b.contains("Hidden", ignoreCase = true)) -> -1 // Keep non-"Others" items above
                 else -> 0 // Maintain relative order for other items
             }
         }
@@ -527,6 +531,7 @@ open class ProjectsService(
                 projectCategoryId = project.projectCategory?.id,
                 projectDescription = project.description,
                 projectLeadId = project.teamLead?.id,
+                projectSubLeadId = project.subTeamLead?.id,
                 projectStatus = project.status,
                 isClpProject = project.isClpProject,
                 serviceTypeId = project.serviceType?.id,
diff --git a/src/main/java/com/ffii/tsms/modules/project/web/models/EditProjectDetails.kt b/src/main/java/com/ffii/tsms/modules/project/web/models/EditProjectDetails.kt
index 943ad3f..933d777 100644
--- a/src/main/java/com/ffii/tsms/modules/project/web/models/EditProjectDetails.kt
+++ b/src/main/java/com/ffii/tsms/modules/project/web/models/EditProjectDetails.kt
@@ -11,6 +11,7 @@ data class EditProjectDetails(
     val projectCategoryId: Long?,
     val projectDescription: String?,
     val projectLeadId: Long?,
+    val projectSubLeadId: Long?,
     val projectPlanStart: LocalDate?,
     val projectPlanEnd: LocalDate?,
     val projectActualStart: LocalDate?,
diff --git a/src/main/java/com/ffii/tsms/modules/project/web/models/MainProjectDetails.kt b/src/main/java/com/ffii/tsms/modules/project/web/models/MainProjectDetails.kt
index ba2e4bc..0632fcb 100644
--- a/src/main/java/com/ffii/tsms/modules/project/web/models/MainProjectDetails.kt
+++ b/src/main/java/com/ffii/tsms/modules/project/web/models/MainProjectDetails.kt
@@ -11,6 +11,7 @@ data class MainProjectDetails (
     val projectDescription: String?,
 
     val projectLeadId: Long?,
+    val projectSubLeadId: Long?,
     val projectStatus: String?,
     val isClpProject: Boolean?,
 
diff --git a/src/main/java/com/ffii/tsms/modules/project/web/models/NewProjectRequest.kt b/src/main/java/com/ffii/tsms/modules/project/web/models/NewProjectRequest.kt
index 5356617..022632b 100644
--- a/src/main/java/com/ffii/tsms/modules/project/web/models/NewProjectRequest.kt
+++ b/src/main/java/com/ffii/tsms/modules/project/web/models/NewProjectRequest.kt
@@ -13,6 +13,7 @@ data class NewProjectRequest(
     val projectCategoryId: Long,
     val projectDescription: String,
     val projectLeadId: Long,
+    val projectSubLeadId: Long? = null,
     val projectId: Long?,
     val projectActualStart: LocalDate?,
     val projectActualEnd: LocalDate?,
diff --git a/src/main/resources/db/changelog/changes/20251129_01_cyril/01_update_project.sql b/src/main/resources/db/changelog/changes/20251129_01_cyril/01_update_project.sql
new file mode 100644
index 0000000..01ffdad
--- /dev/null
+++ b/src/main/resources/db/changelog/changes/20251129_01_cyril/01_update_project.sql
@@ -0,0 +1,12 @@
+-- liquibase formatted sql
+-- changeset cyril:update_project_by_adding_subTeamLead
+
+ALTER TABLE `project`
+    ADD COLUMN `subTeamLead` INT NULL AFTER `teamLead`,
+ADD INDEX `FK_PROJECT_ON_SUBTEAMLEAD` (`subTeamLead` ASC) VISIBLE;
+ALTER TABLE `project`
+    ADD CONSTRAINT `FK_PROJECT_ON_SUBTEAMLEAD`
+        FOREIGN KEY (`subTeamLead`)
+            REFERENCES `staff` (`id`)
+            ON DELETE RESTRICT
+            ON UPDATE RESTRICT;