MBA/PGDM

A B.Tech+MBA is definitely better than only a B.Tech however, most decent B-Schools in India have a classroom with 90% engineers and there is no special differentiation or advantage that you'll get.
There are some B-Schools like NITIE and also some specialisation like Operations and IT that are more suited for engineers as they entail jobs in factories and technical fields, here your B.Tech can make your learning easier and add some value
In terms of placements, I haven't seen a company that prefers an engineer over a non-engineer. Even in fields like Operations and IT, your relevant MBA knowledge and application of the subjects get you a job and not your undergrad degree
One advantage for engineers is that they get easily placed in their in engineering college and hence can gain some relevant work experience before joining an MBA which is a real value add both from learning and job perspective
Prospects for B Tech, MBA are very good. Because from the recruiters perspective, you have been groomed in two vital areas ie, scientific thinking and problem analysis and optimization of resource usage through management. You need to
1. Have around 2 years of experience to get admitted to a good B-School.
2. Choose appropriate specialisation based on your interest, background and aptitude.

IIM, Indore is one of the best campuses in India for MBA education. They offer 100% placement opportunity for students. The average salary is Rs 12 lakhs per annum and highest go beyond Rs 21 lakhs per annum in domestic. In international placement highest is Rs 45 lakhs so far in the campus.
This campus holds direct tie-up for placement with some well known and famous multinational companies like Infosys, TCS, Tech Mahindra, EMC2, THOMSON and Reuters, Walmart, Cisco, Bosch, Wipro, E&Y etc. This help student gets placed in international and national jobs. A large alumni network helps the current students in getting a job with excellent placement package.
So I hope the placement opportunities are very vast for students who study in this campus.

Hindustan Institute of Technology and Science is one of the leading private universities for engineering & technology in Tamil Nadu. It is one of the best institutes with an awesome placement record.
These are some rankings of the Hindustan University.
The WEEK - Hansa Research Seminar(2016-2017) All India Private - 10th Rank. All India South zone Private - 5th Rank.
TIME I3 Research (2016-2017) All India Private Engineering Institute Ranking - 26th Rank
IET has recognized Hindustan University among India's Top Private Universities in i3RC Times Ranking.
School of Management, Hindustan University has been ranked 4th in Metro Ranking and 85th in Overall National Ranking in Business Today's India Best B-School issue.
Hindustan Institute of Technology and Science has been ranked No.3 in Tamil Nadu in Top Engineering Colleges by Competition Success Review (CSR-GHRDC) Survey.
Hindustan Institute of Technology and Science has been ranked No. 1 in Tamil Nadu in Top Engineering Colleges of Eminence by Competition Success Review (CSR-GHRDC) Survey in 2016.
MHRD, GOI, India Rankings, rated HITS as the No.2 Private Engineering Institute in Chennai in 2016.
The Week Hansa Research has ranked School of Management in 4th Place in Chennai, 37th Place in South Zone and 99th Place in All India Private Category.
Business Today has ranked School of Management as No.3 in Chennai, No.9 in Tamilnadu, No.21 in South Zone and No.68 in All India Level Private Category. 15 UNIVERSITY HAND BOOK 2017 - 2018
The Hindu Business Line has ranked School of Management as No.4 in Chennai, No.8 in Tamilnadu, No.30 in South India and No.79 in All India Level Private Category.
Ranked by the Educational World India Pvt. Ltd. University Ranking 2016, 47th position among India's top 100 private universities, 45th among India's top 100 private engineering colleges and 11th place among private engineering colleges in Tamilnadu.
Ranked 20th in India and Engineering Institutions in terms of Placements / Industry Interface / USP. Ranked 13 in Top Engineering Colleges of Excellence. Ranked 13 in Top Private Engineering Colleges. Ranked 3 in Tamil Nadu. (GHRDC & CSR).
Ranked 32 in All India Level. Ranked 22 in South India. Ranked 10 in Tamil Nadu. Ranked 4 in Chennai. (WAY 2 College)
Graded A at the National Level. Graded AA+ in Tamil Nadu. Ranked 11 in Tamil Nadu. Ranked 3 in Chennai. (Careers 360)
All the best for future.

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You can go for technical courses to add value to your resume. To be more efficient, you can go for PMP certification, Six Sigma certification, R course, Python, Advanced Excel, Edx, Google analytics, Front Office Management and Inventory Management. PMP certification can be done with the experience of 3 years or more. So, you need to have a preparatory course of PMP to take the exam. Better go for google analytics, digital marketing, supply chain management course, operation management, family business management, gender differences in entrepreneurship, law and entrepreneurship, entrepreneurial research, laws of electronic businesses, Diploma in business proficiency, leadership study, Diploma in consumer behavior, Diploma in stress management, data analytics, cloud storage concepts, product promotion concepts, product promotion concepts, international labour laws, EXIM courses, foreign language, affiliate marketing, search engine optimization, Diploma in business proficiency, etc.

You can go for technical courses to add value to your resume. To be more efficient, you can go for PMP certification, Six Sigma certification, R course, Python, Advanced Excel, Edx, Google analytics, Front Office Management and Inventory Management. PMP certification can be done with the experience of 3 years or more. So, you need to have a preparatory course of PMP to take the exam. Better go for google analytics, digital marketing, supply chain management course, operation management, family business management, gender differences in entrepreneurship, law and entrepreneurship, entrepreneurial research, laws of electronic businesses, Diploma in business proficiency, leadership study, Diploma in Consumer behavior, Diploma in stress management, data analytics, cloud storage concepts, product promotion concepts, etc.