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

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Contact Us

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


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Global Code of Conduct

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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.

Partner Services

Our Value-Added Solutions

When you partner with Sigma Engineered Solutions, you’ll see why we’re a company that is great to do business with. Sigma is a vertically integrated solutions provider offering services such as in-house tooling, precision machining, surface finishing, rapid prototyping, and assembly. We are a company you can trust to continually develop custom products and services to solve your diverse connection needs.

Employee Working on Computer

Our Services

Custom Tooling
Sigma is capable of designing and manufacturing tools in-house to reduce lead times, costs, and facilitate change management. Our state-of-the-art tool room produces more than 500 tools per year, and in-house tool production also ensures that your intellectual property is protected.
Applies to: Castings
Precision Machining
Sigma uses state-of-the-art CNC as well as vertical and horizontal turning centers to machine intricate, tight-tolerance, and critical cast parts. These high-end machines provide a high level of repeatability and exceptionally smooth surface finishes.
Applies to: Castings
Surface Finishing
Our surface finishing processes include state-of-the-art in-house powder coating and liquid painting capabilities that are compliant with stringent UL requirements for extended outdoor product life and corrosion protection. Sigma also offers hot-dip galvanizing as well as zinc, tin, and silver plating.
Applies to: Castings
Special Purpose Machine Design & Development
Sigma's highly skilled engineering team can design, develop, and manufacture special purpose machines that substantially reduce project lead times. Our vertical integration ensures that all activities are kept in-house to provide complete protection of intellectual property.
Applies to: Castings
Tools & Dies
Our experienced Tool & Die makers increase your speed-to-market using our state-of-the-art tool room and in-house die build process. Created exclusively for building new dies, our tool room allows us to meet your custom requirements quickly and easily.
Applies to: Castings & Connectivity
Heat Treating
Our in-house heat treat ovens reduce lead time and provide cost flexibility while keeping quality control under one roof.
Applies to: Castings & Connectivity
Sigma designs, maintains, and manufactures assembled components. We are a full-service facility that can become an integral part of your supply chain.
Applies to: Castings & Connectivity
Rapid Prototyping
When speed to market counts, Sigma’s Rapid Prototype services can create tangible products from your design in as little as 2-4 weeks. Using our flexible, low-volume prototyping platform, our experienced team will work with you from concept through production.
Applies to: Castings & Connectivity