An extensive range of robust fittings and weatherproof products.


Connectivity solutions such as high brackets, busbars, and connector pins.

Power Transmission & Distribution

Connectors & structural components for cutouts, transformers, & substations.


Complex sensor housings & fracture-critical products.


Robust castings and assemblies for everyday appliances.

Commercial Hardware

Finished components for commercial & residential hardware applications.

Electronics & Telecom

Precision metal stamped sensors, connectors and cast housings & covers.

Fluid Power

Durable, precision products for high-pressure applications.

Food & Beverage

Handles, leveling pins, flow valves & button housings.


Custom housings to fully assembled commercial & industrial light fixtures.


Durable corrosion-resistant engineered castings and subassemblies.

Medical & Dental

Medical-grade parts for implants, housings, manifolds, and pumps.

Oil & Gas

Custom housings and covers for flow control, pressure valves & meters.

Power Tools

Durable yet lightweight custom metal housings.


Innovative precision metal stamped parts.

High Pressure Die Casting

High-pressure liquid metal is pressed into a precision metal mold cavity, and then cooled & solidified under pressure.

Ideal for a wide range of applications, including automotive, agricultural, electronics, and medical.

Sand Casting

Castings with complex shapes & inner cavities that are produced in a sand mold

Ideal for parts with complex shapes and inner cavities

Gravity Die Casting

A mold is filled with liquid metal using gravity and cooled and solidified in the mold to obtain a casting

Ideal for parts with complex shapes made with steel, aluminum or magnesium alloys

Investment Casting

A process used to obtain a mold without a parting surface; creates parts with high dimensional & geometric accuracy

Ideal for near-net shaped parts with complex shapes and high precision requirements

Partner Services

Custom Tooling, Machining, Surface Finishing, Special Purpose Machine Design & Development

Precision Metal Stamping

More than 80 presses convert metal sheets into custom parts

Ideal for parts for electronic connectors and microprocessor chips

Swiss Screw Machining

A specialized CNC machine capable of producing extremely small, precise parts

Ideal for complex miniature screws, contact pins & micro-fasteners

Partner Services

Rapid Prototypes, Heat Treating, Automated Assembly

Company History

Learn more about our company milestones.

Plant Locations

Learn more about our global manufacturing facilities.

Company News

See our company announcements and press releases.

Contact Us

Let us know how we can help create a solution for you


Download catalogs and key product guides.

Global Code of Conduct

Download our Code of Conduct and report violations.

Innovation at Sigma

Purposeful innovation – the continual improvement and innovation of custom-designed and precision-made products and solutions.

Engineered Solutions

Sigma offers solutions for complex product characteristics and technical requirements.

Global Supply Chain Management

U.S.-based supply chain management teams support our customers.

Partner Services

Sigma is a vertically integrated single-source solution provider.

Executive Leadership Change at Sigma

President and Chief Executive Officer, Viren Joshi, will retire following 8 years of dedicated service and outstanding leadership, and Vagner Finelli will become Sigma’s new President and Chief Executive Officer.

As President and CEO, Viren Joshi oversaw the transformation of Sigma into a global market-leader. During his tenure, Sigma’s sales have nearly tripled, the company’s design and manufacturing capabilities have expanded to include machined components and metal stampings, and its manufacturing footprint has expanded from 8 facilities in India to 17 facilities across India, Mexico, and the United States. The company’s focus on world-class manufacturing plants, lean processes, Industry 4.0, and superior customer service makes it ‘easy to do business with’ and has resulted in a wide range of new global customers and multiple awards from customers and industry associations.

Mr. Joshi will remain actively involved with Sigma and will transition to a new role as Executive Vice Chairman of the Board of Directors. In this capacity, Viren will continue to serve as a board member and strategic advisor as Sigma prepares for its next exciting chapter of growth.

Vagner Finelli assumes the role of President and CEO effective January 18th, 2021 and will be based at Sigma’s headquarters in Garner, North Carolina. Vagner joins Sigma after a long career managing global businesses in Automotive and Aerospace. Most recently Vagner served with Precision Castparts Corporation (PCC) as President of Engineered Products and the Wyman Gordon Rings Group. Prior to PCC, Vagner served in several senior leadership roles at Lear, including Vice President and Managing Director of South America and Vice President of the Metals Business Group in Europe. He also served as a senior executive at Textron and Unilever. He holds degrees in Mechanical Engineering from the University of Sao Paulo and an MBA from Michigan State University.