diff --git a/src/main/java/org/jenkinsci/plugins/nomad/NomadCloud.java b/src/main/java/org/jenkinsci/plugins/nomad/NomadCloud.java
index ea8a4e38..59527e20 100644
--- a/src/main/java/org/jenkinsci/plugins/nomad/NomadCloud.java
+++ b/src/main/java/org/jenkinsci/plugins/nomad/NomadCloud.java
@@ -177,8 +177,9 @@ private void pruneOrphanedWorkers(NomadWorkerTemplate template) {
                     String jobNamespace = worker.getJobSummary().getNamespace();
                     JSONObject job = this.nomad.getRunningWorker(jobSummary.getJobID(), jobNamespace);
                     String jobRegion = job.getString("Region");
-                    Instant expiryTime = Instant.ofEpochMilli(job.getLong("SubmitTime"));
-                    expiryTime.plusSeconds(this.workerTimeout * 60);
+                    long expiryTimeMilli = job.getLong("SubmitTime")/1000000;
+                    Instant expiryTime = Instant.ofEpochMilli(expiryTimeMilli);
+                    expiryTime = expiryTime.plusSeconds(this.workerTimeout * 60);
                     Instant now = Instant.now();
                     if (now.isAfter(expiryTime)) {
                         LOGGER.log(Level.FINE, "Found Orphaned Node: " + worker.getID() + " in namespace " + jobNamespace + " in region " + jobRegion);