Greetings of the day aspirant !!

You will be glad to know that yes , part time Ph.D is valid for government jobs. But you have to take permission from the competent authority of your department. If you get permission , then you will do part-time PhD with your government job.

See, there is jo objection in doing distance PhD so go for it as it will also not suffer your government job.

I hope you will be clear now !!

Best wishes :-):-)