Able to activate Timer Job Feature but not displaying job in the timer job definition list

Hi,

We developed a timer Job Solution where the feature activation at site collection level and its working fine include able to find the job name and succeeded timer job at standalone SharePoint 2013 farm environment but when deploying the same solution file at Large SharePoint 2013 farm environment, able to activate the feature at site collection level but unable to find the timer job in the job definition list even we have restarted the SharePoint timer service and IIS.

It would be great and very helpful if someone help us on this.

Thanks

Ramu