About IER
Powering the Gulf Coast and Beyond
For more than 25 years, IER has been the customer’s trusted choice for power distribution equipment across the industrial and commercial landscape. With custom switchgear and panelboards, our reputation is built on performance, reliability, and speed. We’re a build partner for electrical distributors, OEMs, and end users that demand results under pressure.
A New Era Under SEG
In 2023, IER became part of SEG, joining forces with Chicago Switchboard, Park, and CES Industrial to create a unified platform for scalable, engineered power distribution and control equipment. Together, we now offer:
- Low voltage systems up to 1000 VAC/1500 DC
- Medium voltage switchgear up to 38 kV
- Panelboards, switchboards, and control panels and services
- Support design built project
- Support project life cycle from layout to commissioning
As SEG, we carry forward IER’s legacy of precision, speed, and service on a national scale.
Custom Engineered. Built for Scale.
IER specializes in custom and non-standard packaged power solutions, helping customers solve unique challenges while staying on schedule. With a responsive team, deep inventory, and in-house fabrication, we eliminate bottlenecks that slow down conventional OEMs.
Our formula for speed and reliability includes:
- A vast inventory of standard and specialty electrical equipment to reduce lead times
- Engineered repeatability, backed by 3D CAD-driven design workflows
- CNC fabrication and assembly performed in-house for full control from spec to ship
Knowledge Base
U.S. electricity demand growth will be driven by a 9,000% increase in e-mobility consumption and a 300% rise in data center energy use. SEG is ready to meet the challenge.
SEG helped Peetz Farmers Co-Op modernize its grain operations — with a personal touch and attention to detail.
SEG answered the call when an electrical failure knocked out nearly half of a major retail chain’s U.S. meat processing and packaging operations.
When a data center OEM needed two custom lineups delivered ASAP, SEG’s engineers and production team were up to the challenge.
Visit SEG at NECA 2025 Booth 1024 to learn how we can help you cut risk, deliver on time, and stay ahead of the competition.
SEG brings together Chicago Switchboard, CES Industrial, IER, and Park under a unified brand to deliver custom solutions and services with the industry’s fastest lead times.
Our 24-hour emergency services include maintenance testing and quick-ship power distribution solutions when disaster impacts your facility.
With our commitment to quality and timely delivery, we deliver custom-engineered panelboards to meet industry standards and your requirements.
Our Quick Ship UL891 switchboards offer reliability and speed; designed to meet your urgent project timelines without compromising quality.
Our bus runs are designed for inter-connecting groups of metal-enclosed or metal-clad switchgear, power transformers, or other related equipment.
Our comprehensive range of services ensure optimal performance throughout the entire lifecycle of your power distribution equipment.
Sparkstone Electrical Group's medium voltage switchgear offers flexibility and high performance in a variety of different applications.
Our metal enclosed switchgear undergoes rigorous testing to ensure it meets even the most demanding market segments and standards.
Our switchboards offer unmatched configuration flexibility, ensuring that all required components are included within your design.
Custom-Built Power Distribution Equipment
Request a quote today for reliable electrical power distribution and control equipment-
efficient, safe, and built to last!
