diff --git a/modules/es/fsw/src/cfe_es_apps.c b/modules/es/fsw/src/cfe_es_apps.c
index 098510136..b213f7820 100644
--- a/modules/es/fsw/src/cfe_es_apps.c
+++ b/modules/es/fsw/src/cfe_es_apps.c
@@ -295,6 +295,8 @@ int32 CFE_ES_ParseFileEntry(const char **TokenList, uint32 NumTokens)
     int32                   Status;
     CFE_ES_AppStartParams_t ParamBuf;
 
+    memset(&ParamBuf, 0, sizeof(ParamBuf));
+
     /*
     ** Check to see if the correct number of items were parsed
     */
diff --git a/modules/es/fsw/src/cfe_es_task.c b/modules/es/fsw/src/cfe_es_task.c
index 4f03ba7c4..02f5506c6 100644
--- a/modules/es/fsw/src/cfe_es_task.c
+++ b/modules/es/fsw/src/cfe_es_task.c
@@ -639,6 +639,8 @@ int32 CFE_ES_StartAppCmd(const CFE_ES_StartAppCmd_t *data)
     char                                LocalAppName[OS_MAX_API_NAME];
     CFE_ES_AppStartParams_t             StartParams;
 
+    memset(&StartParams, 0, sizeof(StartParams));
+
     /* Create local copies of all input strings and ensure null termination */
     Result = CFE_FS_ParseInputFileNameEx(StartParams.BasicInfo.FileName, cmd->AppFileName,
                                          sizeof(StartParams.BasicInfo.FileName), sizeof(cmd->AppFileName), NULL,