Sienna Corporation


Sienna Corporation is a premier end-to-end solution provider of electronic manufacturing services for the following industries.



Advanced systems and high quality controllers and signallers for the railways.

Aerospace & Defence

Aerospace & Defence

Advanced combustion and transition parts manufacturing for the Aerospace industry.

Power & Energy

Power & Energy

Building key products for development of human society by controlling and adapting to the environment.



High-end systems that makes distances easily shareable.



Enhancing life though innovative processes.

Oil & Gas

Oil & Gas

For products that withstand the harshest environment.



Precision electronic services that are custom-made for the automotive industry.

Industrial Automation

Industrial Automation

Saving labor costs, energy and materials to improve quality, accuracy and precision.

Capabilities & Services

  • Signalling Relay Rack Systems
  • Power Factor Distribution System
  • Inverter
  • ATM Assembly
  • UPS for Data centre

Box Build & Electromechanical

We offer high-end, box build capabilities which integrate with Cable, PCB assemblies, Magnetics, Metal, and Plastics; individual tests of sub-assemblies for seamless Electro-Mechanical Integration.

Our System Engineering teams ensure successful testing, and after an extensive customized End of Line testing procedure, we pack & ship your fully built product.

  • Digital Board
  • Base Station
  • Power Inverter
  • Water Purifier
  • Ralway application

Printed Circuit Board Assembly

With more than 8 assembly lines, the PCBA facilities in Bangalore, Chennai and Atlanta provide highly complex PCB assemblies with very high yield.

Sienna’s PCB assembly facilities are future ready providing support on next generation chip mounting capabilities.

  • Power Cable
  • Power Actuator
  • Braided Cables - Defense appication
  • Communication Cable
  • Plastic Insert Moulding
  • Power Cable
  • Moulding

Cable & Wire Harness Assembly

Our cable and wire harness assemblies include industrial as well as milspec applications and the designs can be customized to demanding specifications.

  • Complex wiring looms as per MIL standards
  • Flat ribbon cable assembly
  • RF cable assembly
  • Custom wire harness
  • Cable assemblies with overmolding
  • Board harness
  • Cable assemblies with potting
  • Cable assemblies for medical application
  • Conduit assemblies & harness braiding
  • Power cables
  • Magnetics
  • Choke
  • Toroidal-Inductor
  • Transformer


Our in-house magnetics capabilities extend to high volume builds, testing and design to custom specifications.

  • Transformers
  • Inductors
  • Solenoids
  • Chokes
  • Baluns
  • Education Tablet
  • Power Generator Controller
  • Industrial Controller
  • Power Surge Arrestors
  • Bed Control
  • Circuit Breaker


Sienna’s extensive manufacturing capabilities encompass a wide range of high-end plastic devices including:

  • Plastics tooling
  • Plastics DFM review
  • Ultrasonic review
  • High tonnage capabililites


  • High Performance Plastics
  • General Plastics – ABS
    ABS, ABS + 20% GF, ABS _ FRGR
  • General Plastics – PC
    PC, PC_ABS
  • General Plastics – Others
  • Aerospace Combustion Liner
  • Aerospace assemblies
  • Gear Assembly
  • Machined Part
  • Interlock - Mechanical Assembly
  • Sheet Metal Fabrication
  • Metal Casting
  • Machined Nen Ferrous Copper
  • Railway Metal

Metal Fabrication

Sienna provides sophisticated assembly and fabrication for all our metal components.

Our expertise includes:

  • Aerospace metal sub-assemblies
  • Formed parts
  • Complex fabrications & assemblies
  • Machining up to 5 axis
  • Titanium hot forming – resistance welding
  • Tool & die manufacturing
  • Capability to weld and assemble foils
  • Heat treatment
  • TIG welding
  • Brazing
  • NDT
  • Finishing process
  • Complex PCB design
  • Signal Integrity
  • Thermal Analysis

Engineering Services

Sienna offers both System design and process engineering services

Design Engineering: The challenge faced by the design teams across industries is to provide optimal designs at tight budget and timelines. Our in-house design team can work independently or in coordination with our partners’ team to meet your specific design requirements in areas of complete Firmware design, PCB design engineering including Signal Integrity, Thermal and EMI Analysis.

Process Engineering: Sienna will critically re-assess processes and explore faster, smarter and cost-effective ways of doing them.

  • Flying Probe Tester
  • Bed of Nails Tester
  • Functional Tester - ATE
  • Functional Tester (ATE)

Testing Capabilities

With extensive in-house quality and testing processes, you can be assured of the highest level product design and manufacturing for all your requirements.

  • Custom test program design and implementation
  • In-circuit test and flying probe test
  • Sub-system assembly and test
  • Complete system assembly and pack with documentation
  • Burn-in and accelerated life test

Supply Chain

Transparency and information sharing are the keys to maintaining effective supply chain management.

Our web-based, supply chain management and reporting tools allow us to excel in the following areas:


Vendor Management

Our extensive global networks will allow our customers to monitor and regulate the suppliers effectively and at competitive costs. We can provide complete end-to-end solutions starting from design to shipment and distribution of end product and hence offer a lot of flexibility in our services. This global materials management facilitates reduction in product life cycles and also makes our services extremely cost-effective.


Inventory Management

At Sienna we have synchronized our inventory management system with supply chain operations to ensure better inventory maintenance, inventory record accuracy and inventory access speed. In close association with our partners, we have repeatedly succeeded in reducing purchase order transaction costs and in fulfilling inventory needs.


Virtual Manufacturing

The materialization of digital convergence across the globe has narrowed the information gap between the different manufacturing units. Sienna offers an integrated package for virtual manufacturing support starting from prototyping and pilot production all the way to volume production, testing, logistics and order fulfillment.