diff --git a/infrastructure/stacks/networking/ssm.tf b/infrastructure/stacks/networking/ssm.tf
index 666396b98..8d7b8ed35 100644
--- a/infrastructure/stacks/networking/ssm.tf
+++ b/infrastructure/stacks/networking/ssm.tf
@@ -1,15 +1,19 @@
-# resource "aws_ssm_parameter" "proxygen_private_key" {
-#   count = var.environment == "dev" ? 1 : 0
-#   name  = "/proxygen/private_key"
-#   type  = "SecureString"
-#   value = var.PROXYGEN_PRIVATE_KEY
-#   tier  = "Advanced"
-#
-#   tags = {
-#     Stack = local.stack_name
-#   }
-# }
-#
+resource "aws_ssm_parameter" "proxygen_private_key" {
+  name  = "/${var.environment}/proxygen/private_key"
+  type  = "SecureString"
+  key_id = aws_kms_key.networking_ssm_key.id
+  value = var.PROXYGEN_PRIVATE_KEY
+  tier  = "Advanced"
+
+  tags = {
+    Stack = local.stack_name
+  }
+
+  lifecycle {
+    ignore_changes = [value]
+  }
+}
+
 resource "aws_ssm_parameter" "mtls_api_ca_cert" {
   name   = "/${var.environment}/mtls/api_ca_cert"
   type   = "SecureString"
diff --git a/infrastructure/stacks/networking/variables.tf b/infrastructure/stacks/networking/variables.tf
index 54b28dcef..806508eac 100644
--- a/infrastructure/stacks/networking/variables.tf
+++ b/infrastructure/stacks/networking/variables.tf
@@ -13,3 +13,8 @@ variable "API_PRIVATE_KEY_CERT" {
   description = "The private key for the signed Client Certificate"
   sensitive   = true
 }
+variable "PROXYGEN_PRIVATE_KEY" {
+  type        = string
+  description = "The private key for Proxygen authentication"
+  sensitive   = true
+}