Hey!

An M. Tech. degree will typically indicate prior research experience and increased expertise in area of specialization -- so if anything it will only help to improve the odds of getting admit. Never heard of a US university preventing applicants with prior masters degree from applying,

The more commonly seen concern from an applicant with M.Tech is whether they would have to do another masters in US before they can move towards PhD.

Yes you can do MS in US after your M.Tech

Universities will always allow a graduate admit if they find the profile suitable. You will just have to explain to them why you are applying for a second masters.

There are many students who do their M.Tech and then go for a Masters in Marketing/Information Management/Business Administration either because of passion/interests or to grow in the industry.

Hope this may helps you!