Sita Singh & Sons Becomes Haryana’s First Bus Body Builder With AIS-153 Certification

Sita Singh & Sons Private Limited has become the first bus body builder in Haryana to secure AIS-153 certification, marking a significant step in the company’s school bus manufacturing and regulatory compliance capabilities. The certification covers school buses across OEM platforms in both 3×2 and 3×3 seating configurations.

The certification was achieved under the guidance of Deepak Rajput, Head of R&D and Homologation at Sita Singh & Sons, as the company continues to strengthen its focus on engineering, testing and passenger safety.

AIS-153 Certification Across School Bus Platforms

For school bus manufacturers, AIS-153 certification places greater emphasis on compliance, engineering and safety throughout the vehicle development process.

Sita Singh & Sons has secured certification across a diverse range of school bus variants, covering different OEM platforms and seating configurations. This gives the company a broader certified product base for OEMs and fleet operators looking for compliant school bus solutions.

“This certification marks a significant milestone for us. With this achievement, we are targeting a production of around 1,000 vehicles per month, further strengthening our ability to meet growing demand while maintaining the highest safety standards.”

Samarth Barar, CEO, Sita Singh & Sons

The certification also reflects the company’s emphasis on in-house engineering and homologation capabilities.

Engineering and Manufacturing Under One Roof

Founded in 1965, Sita Singh & Sons has built its presence in India’s bus body manufacturing industry over several decades.

The company operates a 20-acre manufacturing facility in the Delhi-NCR region, with capabilities spanning school and staff buses, luxury 12-metre coaches, 13.5-metre sleeper buses, load bodies and in-house seat manufacturing.

Its engineering capabilities include in-house CAD and CAE systems, supporting the development and validation of bus bodies against applicable regulatory requirements.

“We never compromise on standards or regulations. Passenger safety, especially for school buses, is our top priority. Our in-house CAD and CAE capabilities ensure every vehicle meets the latest norms and regulatory standards.”

Deepak Rajput, Head of R&D and Homologation, Sita Singh & Sons Pvt. Ltd

A Wider Role for Bus Body Builders

The AIS-153 certification comes at a time when compliance is becoming an increasingly important part of India’s bus body manufacturing industry.

For companies supplying school buses across multiple OEM platforms, certification requires coordination between design, engineering, manufacturing, testing and documentation. It also provides OEMs and operators with greater clarity when evaluating certified bus body solutions.

For Sita Singh & Sons, the latest milestone strengthens its position in the school bus segment while supporting its wider portfolio of commercial and passenger vehicles. With its combination of manufacturing infrastructure, in-house engineering capabilities and AIS-153 certified school bus variants, the company is looking to scale production while continuing to focus on safety and regulatory compliance.