diff --git a/.circleci/config.yml b/.circleci/config.yml
index c36a632..9089815 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -71,6 +71,7 @@ workflows:
             branches:
               only:
                 - develop
+                - plat-1226-bulk-apis
       - "build-prod":
           context : org-global
           filters:
diff --git a/app-bootstrap.js b/app-bootstrap.js
index e689199..d24e381 100644
--- a/app-bootstrap.js
+++ b/app-bootstrap.js
@@ -1,7 +1,8 @@
 /**
  * App bootstrap
  */
-global.Promise = require('bluebird')
+// commenting this as need to use the pure Promise features
+// global.Promise = require('bluebird')
 const Joi = require('joi')
 
 Joi.optionalId = () => Joi.string()
diff --git a/src/controllers/GroupMembershipController.js b/src/controllers/GroupMembershipController.js
index 38238dd..774b203 100644
--- a/src/controllers/GroupMembershipController.js
+++ b/src/controllers/GroupMembershipController.js
@@ -25,11 +25,21 @@ async function getGroupMembers (req, res) {
  * @param res the response
  */
 async function addGroupMember (req, res) {
-  const result = await service.addGroupMember(
-    req.authUser.isMachine ? 'M2M' : req.authUser,
-    req.params.groupId,
-    req.body
-  )
+  let result
+  if (req.body.members && req.body.members.length > 0) {
+    result = await service.addGroupMemberBulk(
+      req.authUser.isMachine ? 'M2M' : req.authUser,
+      req.params.groupId,
+      req.body
+    )
+  } else {
+    result = await service.addGroupMember(
+      req.authUser.isMachine ? 'M2M' : req.authUser,
+      req.params.groupId,
+      req.body
+    )
+  }
+
   res.send(result)
 }
 
@@ -53,12 +63,22 @@ async function getGroupMember (req, res) {
  * @param res the response
  */
 async function deleteGroupMember (req, res) {
-  const result = await service.deleteGroupMember(
-    req.authUser.isMachine ? 'M2M' : req.authUser,
-    req.params.groupId,
-    req.params.memberId ? req.params.memberId : null,
-    Object.keys(req.query).length !== 0 ? req.query : null
-  )
+  let result
+  if (req.body && req.body.members && req.body.members.length > 0) {
+    result = await service.deleteGroupMemberBulk(
+      req.authUser.isMachine ? 'M2M' : req.authUser,
+      req.params.groupId,
+      req.body
+    )
+  } else {
+    result = await service.deleteGroupMember(
+      req.authUser.isMachine ? 'M2M' : req.authUser,
+      req.params.groupId,
+      req.params.memberId ? req.params.memberId : null,
+      Object.keys(req.query).length !== 0 ? req.query : null
+    )
+  }
+
   res.send(result)
 }
 
diff --git a/src/services/GroupMembershipService.js b/src/services/GroupMembershipService.js
index 2f9d817..bd99297 100644
--- a/src/services/GroupMembershipService.js
+++ b/src/services/GroupMembershipService.js
@@ -172,6 +172,56 @@ addGroupMember.schema = Joi.alternatives().try(
   })
 )
 
+/**
+ * Add group members in bulk.
+ * @param {Object} currentUser the current user
+ * @param {String} groupId the id of group to add member
+ * @param {Array} data the data for members to add
+ * @returns {Object} the added group membership
+ */
+async function addGroupMemberBulk (currentUser, groupId, data) {
+  logger.debug(`Enter in addGroupMemberBulk - Group = ${groupId} Data = ${JSON.stringify(data)}`)
+
+  const membersAddRes = await Promise.allSettled(data.members.map(member => addGroupMember(currentUser, groupId, member)))
+
+  const result = {}
+  result.groupId = groupId
+
+  const members = data.members.map((member, i) => {
+    if (membersAddRes[i].status === 'fulfilled') {
+      return {
+        memberId: member.memberId,
+        status: 'success'
+      }
+    } else {
+      return {
+        memberId: member.memberId,
+        status: 'failed',
+        message: membersAddRes[i].reason.message
+      }
+    }
+  })
+
+  result.members = members
+
+  return result
+}
+
+addGroupMemberBulk.schema = Joi.object().keys({
+  currentUser: Joi.any(),
+  groupId: Joi.id(), // defined in app-bootstrap
+  data: Joi.object()
+    .keys({
+      members: Joi.array().items(
+        Joi.object({
+          memberId: Joi.id(),
+          membershipType: Joi.string().valid(_.values(config.MEMBERSHIP_TYPES)).required()
+        })
+      )
+        .required()
+    })
+})
+
 /**
  * Delete group member.
  * @param {Object} currentUser the current user
@@ -257,6 +307,50 @@ deleteGroupMember.schema = {
   query: Joi.object().allow('', null)
 }
 
+/**
+ * Delete group members in bulk.
+ * @param {Object} currentUser the current user
+ * @param {String} groupId the id of group from members to delete
+ * @param {Array} data the data for members to delete
+ * @returns {Object} the deleted group membership
+ */
+async function deleteGroupMemberBulk (currentUser, groupId, data) {
+  logger.debug(`Enter in deleteGroupMemberBulk - Group = ${groupId} Data = ${JSON.stringify(data)}`)
+
+  const membersAddRes = await Promise.allSettled(data.members.map(member => deleteGroupMember(currentUser, groupId, member)))
+
+  const result = {}
+  result.groupId = groupId
+
+  const members = data.members.map((member, i) => {
+    if (membersAddRes[i].status === 'fulfilled') {
+      return {
+        memberId: member,
+        status: 'success'
+      }
+    } else {
+      return {
+        memberId: member,
+        status: 'failed',
+        message: membersAddRes[i].reason.message
+      }
+    }
+  })
+
+  result.members = members
+
+  return result
+}
+
+deleteGroupMemberBulk.schema = Joi.object().keys({
+  currentUser: Joi.any(),
+  groupId: Joi.id(), // defined in app-bootstrap
+  data: Joi.object()
+    .keys({
+      members: Joi.array().required()
+    })
+})
+
 /**
  * Get group members
  * @param {Object} currentUser the current user
@@ -597,7 +691,9 @@ module.exports = {
   getGroupMembersCount,
   listGroupsMemberCount,
   getMemberGroups,
-  groupValidityCheck
+  groupValidityCheck,
+  addGroupMemberBulk,
+  deleteGroupMemberBulk
 }
 
 logger.buildService(module.exports)