Hi, I’m Sandeep Kumar, an IT professional, instructor, and founder of a training company in India.

Years of Practical Experience:

I have 15+ years of experience in the IT industry, working across technologies such as Mainframe, Cloud Services, Python, Java, PHP, Perl, Regular Expressions, JavaScript, Web Development, and AI tools. Along with my technical background, I also have 15+ years of experience as an instructor, helping students and professionals build practical skills for their careers.

Job Title and Credentials:

I worked on different types of IT projects, including development, maintenance, production support, monitoring, automation, and end-to-end project delivery. I have worked with multiple Fortune 500 companies, including a Fortune 1 global retail company, where I was part of a team that monitored systems across more than 5,000 stores worldwide. Some of the Companies I worked for are -

- Cognizant Technology Solutions as  a Programmer Analyst

- Walmart as a Programmer Analyst

- Larsen & Toubro (L&T) - Senior Software Engineer

- Link Market Services - Tech Lead

- Unified Grocers - Tech Lead

- Cyient Limited

- NMDC, Hyderabad

Currently, I am the founder and managing director of Trainool.

My professional experience includes working in industries such as Retail, Insurance, Banking, and Financial Markets. I have hands-on experience in Mainframe technologies including TSO/ISPF, JCL, VSAM, COBOL, DB2, CICS, IMS, and PL/I. Along with Mainframe, I also work with modern technologies such as Cloud Computing, Big Data, Python, PHP, Java, JavaScript, Website Development, Automation, and AI productivity tools.

Professional recognition and certifications:

I completed my Bachelor of Technology (B-Tech) in Computer Science and Master of Technology (M-Tech) in Software Application and Development from Vellore Institute of Technology (VIT).

While working in the professional world, I received prestigious awards like:

** Warriors of all time

** Hall of Fame

** Mainframe Certified

** other technical certifications whose list is too long to be listed here

Expert Teaching experience:

I have taught more than 2 Lakh students worldwide and am currently the Instructor of many "Bestseller" and "Highest Rated" Courses on Udemy.

Some of my Bestseller courses include -

- Mainframe: The Complete COBOL Course From Beginner To Expert

- Mainframe: The Complete TSO/ISPF from Beginner to Expert

- Complete Microsoft SQL Server Masterclass: Beginner to Expert

- The Complete Google BigQuery Masterclass: Beginner to Expert

- Mainframe: The Complete JCL Course from Beginner to Expert

- Mainframe: Code DB2 on COBOL Programs for Absolute Beginners

- Complete Google Slides from Scratch

- Microsoft Access SQL: SQL from Absolute Beginners To Expert

As an instructor, my goal is simple:
To make complex topics easy to understand through practical examples, clear explanations, and real-world use cases.

I strongly believe that learning should be simple, structured, and career-focused. Whether you are a beginner, a working professional, or someone preparing for certification exams, my courses are designed to help you learn step by step and gain confidence.

Apart from technical subjects, I also know English, Hindi, and French, and I have experience teaching French to students as well.

Today, I also actively use and teach the practical application of AI tools for learning, productivity, automation, content creation, and professional growth.

I look forward to helping you learn new skills and move forward in your career.