A diploma holder usually starts with around INR4 to INR5 lakh per annum. Fresh jobs often offer about INR25,000-INR45,000 per month. With development in aviation and aerospace sector in India and abroad demand for such engineers remains high.
After completing Diploma in Aerospace Engineering you can work as aerospace engineer aircraft maintenance technician, avionics technician manufacturing or testing engineer qualitycontrol engineer or other technical roles in aviation industry. You may get jobs in organizations such as space agencies aircraft manufacturers maintenance & overhaul (MRO) firms airlines defense related companies etc.
The aviation and aerospace industry in India is growing. That growth increases demand for skilled diploma holders. Diploma gives you practical technical skills designing building testing aircraft and spacecraft which many employers need. Because of broad job-roles you are not limited to one narrow path. If you stay skilled and ready to learn you can grow in this field.
Starting salary (INR4-5 LPA) may feel modest compared to some other engineering fields. Industry demand and salary growth depend on skills performance and market not guaranteed. Some high level or design centric roles may prefer full degree (B.Tech) or higher qualification instead of diploma.