diff --git a/modules/ManagementGovernance/Monitoring.OpenSearch/main.tf b/modules/ManagementGovernance/Monitoring.OpenSearch/main.tf
index 19e97d0..6e70eb6 100644
--- a/modules/ManagementGovernance/Monitoring.OpenSearch/main.tf
+++ b/modules/ManagementGovernance/Monitoring.OpenSearch/main.tf
@@ -96,3 +96,218 @@ resource "aws_cloudwatch_metric_alarm" "ES-ClusterStatusRed" {
   }
 }
 
+resource "aws_cloudwatch_metric_alarm" "ES-ThreadpoolWriteQueue" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:ThreadpoolWriteQueue:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "ThreadpoolWriteQueue"
+  period                    = "60"
+  statistic                 = "Average"
+  threshold                 = var.threshold-ThreadpoolWriteQueue
+  alarm_description         = "The cluster is experiencing high indexing concurrency. Review and control indexing requests, or increase cluster resources."
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-standard]
+  ok_actions                = [var.sns-targets.alarm-actions-standard]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-ThreadpoolSearchQueue" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:ThreadpoolSearchQueue:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "ThreadpoolSearchQueue"
+  period                    = "60"
+  statistic                 = "Average"
+  threshold                 = var.threshold-ThreadpoolSearchQueue
+  alarm_description         = "The cluster is experiencing high search concurrency. Consider scaling your cluster. You can also increase the search queue size, but increasing it excessively can cause out of memory errors."
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-standard]
+  ok_actions                = [var.sns-targets.alarm-actions-standard]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-ThreadpoolSearchRejected" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:ThreadpoolSearchRejected:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "ThreadpoolSearchRejected"
+  period                    = "60"
+  statistic                 = "Average"
+  threshold                 = var.threshold-ThreadpoolSearchRejected
+  alarm_description         = "These alarms notify you of domain issues that might impact performance and stability."
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-urgent]
+  ok_actions                = [var.sns-targets.alarm-actions-urgent]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-ThreadpoolWriteRejected" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:ThreadpoolWriteRejected:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "ThreadpoolWriteRejected"
+  period                    = "60"
+  statistic                 = "Average"
+  threshold                 = var.threshold-ThreadpoolWriteRejected
+  alarm_description         = "These alarms notify you of domain issues that might impact performance and stability."
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-urgent]
+  ok_actions                = [var.sns-targets.alarm-actions-urgent]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-MasterCPUUtilization" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:MasterCPUUtilization:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "MasterCPUUtilization"
+  period                    = "300"
+  statistic                 = "Average"
+  threshold                 = var.threshold-MasterCPUUtilization
+  alarm_description         = "MasterCPUUtilization"
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-urgent]
+  ok_actions                = [var.sns-targets.alarm-actions-urgent]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-MasterJVMMemoryPressure" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:MasterJVMMemoryPressure:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "MasterJVMMemoryPressure"
+  period                    = "60"
+  statistic                 = "Average"
+  threshold                 = var.threshold-MasterJVMMemoryPressure
+  alarm_description         = "MasterJVMMemoryPressure"
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-urgent]
+  ok_actions                = [var.sns-targets.alarm-actions-urgent]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-JVMMemoryPressure" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:JVMMemoryPressure:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "JVMMemoryPressure"
+  period                    = "60"
+  statistic                 = "Average"
+  threshold                 = var.threshold-JVMMemoryPressure
+  alarm_description         = "The cluster could encounter out of memory errors if usage increases. Consider scaling vertically. OpenSearch Service uses half of an instance's RAM for the Java heap, up to a heap size of 32 GiB. You can scale instances vertically up to 64 GiB of RAM, at which point you can scale horizontally by adding instances."
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-urgent]
+  ok_actions                = [var.sns-targets.alarm-actions-urgent]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-ClusterIndexWritesBlocked" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:ClusterIndexWritesBlocked:${var.domain-name}"
+  comparison_operator       = "GreaterThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "ClusterIndexWritesBlocked"
+  period                    = "60"
+  statistic                 = "Average"
+  threshold                 = var.threshold-ClusterIndexWritesBlocked
+  alarm_description         = "Your cluster is blocking write requests. See ClusterBlockException."
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-urgent]
+  ok_actions                = [var.sns-targets.alarm-actions-urgent]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "ES-FreeStorageSpace" {
+  alarm_name                = "${var.cw-alarm-prefix}:ES:FreeStorageSpace:${var.domain-name}"
+  comparison_operator       = "LessThanThreshold"
+  evaluation_periods        = "2"
+  metric_name               = "FreeStorageSpace"
+  period                    = "300"
+  statistic                 = "Average"
+  threshold                 = var.threshold-FreeStorageSpace
+  alarm_description         = "A node in your cluster is low on free storage space."
+  namespace                 = "AWS/ES"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [var.sns-targets.alarm-actions-urgent]
+  ok_actions                = [var.sns-targets.alarm-actions-urgent]
+  dimensions = {
+    DomainName = var.domain-name
+    ClientId   = data.aws_caller_identity.this.id
+  }
+  tags = var.default-tags
+  lifecycle {
+    ignore_changes = [tags]
+  }
+}
diff --git a/modules/ManagementGovernance/Monitoring.OpenSearch/variables.tf b/modules/ManagementGovernance/Monitoring.OpenSearch/variables.tf
index 28d9fdb..923cd2e 100644
--- a/modules/ManagementGovernance/Monitoring.OpenSearch/variables.tf
+++ b/modules/ManagementGovernance/Monitoring.OpenSearch/variables.tf
@@ -1,10 +1,19 @@
-variable cw-alarm-prefix {}
-variable actions-enabled {}
-variable domain-name {}
-variable sns-targets {}
-variable default-tags {}
+variable "cw-alarm-prefix" {}
+variable "actions-enabled" {}
+variable "domain-name" {}
+variable "sns-targets" {}
+variable "default-tags" {}
 
-variable threshold-CPUUtilization {}
-variable threshold-SearchLatency {}
-variable threshold-IndexingLatency {}
+variable "threshold-CPUUtilization" {}
+variable "threshold-SearchLatency" {}
+variable "threshold-IndexingLatency" {}
+variable "threshold-ThreadpoolWriteQueue" {}
+variable "threshold-ThreadpoolSearchQueue" {}
+variable "threshold-ThreadpoolSearchRejected" {}
+variable "threshold-ThreadpoolWriteRejected" {}
+variable "threshold-MasterCPUUtilization" {}
+variable "threshold-MasterJVMMemoryPressure" {}
+variable "threshold-JVMMemoryPressure" {}
+variable "threshold-ClusterIndexWritesBlocked" {}
+variable "threshold-FreeStorageSpace" {}
 # variable threshold-KibanaHealthyNodes {}
\ No newline at end of file