diff --git a/src/opengnsys/jobmgr.py b/src/opengnsys/jobmgr.py
index 692dce5..1df0e5b 100644
--- a/src/opengnsys/jobmgr.py
+++ b/src/opengnsys/jobmgr.py
@@ -1,6 +1,7 @@
-import threading 
+import threading
 import subprocess
 import hashlib
+import time
 from datetime import datetime, timezone
 from opengnsys import operations
 from opengnsys.log import logger
@@ -34,14 +35,28 @@ class JobMgr():
 
     def prepare_jobs(self):
         ## can't return self.jobs because the Popen object at self.jobs[id]['p'] is not serializable. So, need to create a new dict to return
-        st = {}
+        st = []
         for jobid in self.jobs:
             j = self.jobs[jobid]
-            st[jobid] = dict ((k, j[k]) for k in ['pid', 'starttime', 'script', 'client', 'status', 'stdout', 'stderr'])
+            entry = dict ((k, j[k]) for k in ['pid', 'starttime', 'script', 'client', 'status', 'stdout', 'stderr'])
+            entry['jobid'] = jobid
             if j['p'].poll() is not None:    ## process finished
-                st[jobid]['rc'] = j['p'].returncode
-                st[jobid]['status'] = 'finished'
+                entry['rc'] = j['p'].returncode
+                entry['status'] = 'finished'
+            st.append (entry)
         return st
 
-    #def kill_job(self, jobid):
-    #    self.jobs[jobid]['p'].kill()
+    def terminate_job(self, jobid):
+        if jobid not in self.jobs: return {}
+        p = self.jobs[jobid]['p']
+        p.terminate()
+        time.sleep (1)
+        if p.poll() is not None:
+            return { 'terminated': True }
+
+        p.kill()
+        time.sleep (1)
+        if p.poll() is not None:
+            return { 'killed': True }
+
+        return { 'killed': False }
diff --git a/src/opengnsys/modules/client/OpenGnSys/__init__.py b/src/opengnsys/modules/client/OpenGnSys/__init__.py
index b0c1b36..ce47254 100644
--- a/src/opengnsys/modules/client/OpenGnSys/__init__.py
+++ b/src/opengnsys/modules/client/OpenGnSys/__init__.py
@@ -47,13 +47,17 @@ class OpenGnSysWorker(ClientWorker):
     def onDeactivation(self):
         logger.debug('Deactivate invoked')
     
-    # Processes script execution
     def process_script(self, json_params):
         script = json_params['code']
         logger.debug('Processing message: script({})'.format(script))
         self.jobmgr.launch_job (script, True)
         #self.sendServerMessage('script', {'op', 'launched'})
 
+    def process_terminatescript(self, json_params):
+        jobid = json_params['jobid']
+        logger.debug('Processing terminatescript request, jobid "{}"'.format (jobid))
+        self.jobmgr.terminate_job (jobid)
+
     def process_preparescripts(self, json_params):
         logger.debug('Processing preparescripts request')
         st = self.jobmgr.prepare_jobs()
diff --git a/src/opengnsys/modules/server/OpenGnSys/__init__.py b/src/opengnsys/modules/server/OpenGnSys/__init__.py
index fe097d6..04e8967 100644
--- a/src/opengnsys/modules/server/OpenGnSys/__init__.py
+++ b/src/opengnsys/modules/server/OpenGnSys/__init__.py
@@ -345,6 +345,17 @@ class OpenGnSysWorker(ServerWorker):
             #return {'op': 'launched', 'jobid': jobid}       ## TODO obtain jobid generated at the client (can it be done?)
             return {'op': 'launched'}
 
+    @execution_level('full')
+    @check_secret
+    def process_terminatescript(self, path, get_params, post_params, server):
+        jobid = post_params.get('jobid', None)
+        logger.debug('Processing terminate_script request, jobid "{}"'.format (jobid))
+        if jobid is None:
+            return {}
+        self.sendClientMessage('terminatescript', {'jobid': jobid})
+        self.jobmgr.terminate_job (jobid)
+        return {}
+
     @execution_level('full')
     @check_secret
     def process_preparescripts(self, path, get_params, post_params, server):
@@ -358,7 +369,7 @@ class OpenGnSysWorker(ServerWorker):
         logger.debug('Processing preparescripts message from client')
         for p in params:
             #logger.debug ('p "{}"'.format(p))
-            self.st[p] = params[p]
+            self.st.append (p)
 
     @execution_level('full')
     @check_secret