About Malloy Electric

We're Here to Make Things Right. Finding Your Solutions.

Where We Are Today

Malloy operates eight Centers of Excellence across a six-state footprint covering South Dakota, North Dakota, Nebraska, Iowa, Wyoming, and Montana:

  • Sioux Falls, South Dakota: our headquarters and largest facility, home to our newest 150,000 square foot National Operations Center featured on the cover of Electrical Apparatus magazine in June 2026.

  • Dakota Dunes, South Dakota

  • Fargo, North Dakota

  • Mandan, North Dakota

  • Omaha, Nebraska

  • Cedar Rapids, Iowa

  • Gillette, Wyoming

  • Billings, Montana

Our advanced locations in Dakota Dunes, Omaha, and Mandan are designed around the full range of industrial service needs. Each includes inside technical support, outside sales teams, a motor repair center capable of servicing motors up to 15,000 horsepower, a full-service machine shop, an electronic service department, engineering services, offices, and warehouse space. Our five additional locations work synergistically with our Sioux Falls headquarters to deliver consistent service across the entire footprint. Every Center of Excellence operates from the same quality system, follows the same procedures, and delivers to the same standards. The physical location changes; the quality standard does not.

Malloy Electric has served industrial customers across the northern plains and mountain west since 1945. Eight decades of continuous operation have shaped who we are, how we work, and what our customers can expect from us. This page tells that story: where we came from, how we grew, what we do today, and why the way we operate matters to the plants, utilities, cooperatives, mines, and processors who rely on us to keep their equipment running.

Our Story

Malloy's journey began in 1945, founded by Emmett and Mary Malloy in a modest building in downtown Sioux Falls, South Dakota. The original company had two departments: Motor Repair and Electric Construction. Both departments served an industrial economy that was rebuilding after the war and modernizing rapidly, and both established the foundation of hands-on service that defines Malloy to this day. In 1971, Garry and Dianne Jacobson took the helm and broadened the company's scope to include retail sales of motors, electrical equipment, and power transmission components. The expansion positioned Malloy as a complete industrial partner rather than a single service shop, and it laid the groundwork for the multi-location, multi-service-line business we have become. The decades since have been a continuous story of growth, capability expansion, and customer commitment. Each expansion has been driven by customer need: a new location where existing customers were struggling with response time, a new service line where customers needed capability we did not yet offer, an upgraded facility where the scale of the work exceeded what the existing shop could handle. We have grown because our customers grew, and because we invested to keep pace with them.

What We Do

What Sets Us Apart

Eight decades of continuous operation are not an accident. A few things separate Malloy from the field:

We solve problems, not just fill orders. When a customer calls with a failed motor, a mystery vibration, a VFD tripping intermittently, or a gearbox making a noise they cannot place, the answer is rarely a simple parts substitution. It is an application engineering problem, and we treat it as one.

We invest in capability. Our machine shops, electronic shops, and motor repair centers represent significant continuing investment. Our newest 150,000 square foot National Operations Center in Sioux Falls is the physical evidence of that commitment. So is the addition of laser cladding capability, the expansion of our Cedar Rapids operations, and the ongoing modernization of every Center of Excellence.

We stay close to our customers. Eight Centers of Excellence across six states put a Malloy team within short response time of most industrial customers in the region. Field service dispatched from a local center means faster response and lower cost than crews traveling long distances.

We back our work. Every job carries a documented quality record. Every repair carries the warranty appropriate to the work. Every service commitment is supported by the procedures behind it.

We are here for the long haul. Businesses that cut corners on quality, customer service, or investment do not last eighty years. Businesses that treat their customers well, deliver consistent work, and keep their commitments do.

Our capabilities span the full lifecycle of industrial rotating and control equipment. We are a complete service partner across the following service lines:

Motor Repair and Sales

Electric motor repair, rewind, and new motor sales across the full range from fractional horsepower through 15,000 horsepower. Our motor repair work follows EASA AR100 standards for the repair of rotating electrical apparatus. We work on low voltage NEMA and IEC frame motors, medium voltage motors (2.3 kV through 15 kV), above-NEMA large frame motors, synchronous motors, and specialty applications including hazardous location, washdown duty, and inverter duty configurations. Authorized partner brands include ABB, Siemens, WEG, Regal Beloit, and Toshiba.

Gearbox Rebuild and Sales

Industrial gearbox rebuild, in-shop repair, field service, and new gearbox sales. Our gearbox work covers parallel shaft helical, bevel helical, worm, planetary, cycloidal, and shaft-mounted reducers across the industrial duty range. Authorized partner brands include Martin, Timken, and SEW Eurodrive.

VFD Installation and Service

Variable frequency drive selection, installation, commissioning, and field service. We cover low voltage drives across the standard industrial range and medium voltage drives including neutral point clamped (NPC), cascaded H-bridge (CHB), and load commutated inverter (LCI) topologies. Authorized VFD partner brands include ABB, Toshiba, and Fuji.

Custom UL508A Control Panels and MCCs

Custom industrial control panel design and manufacture in our UL508A certified panel shop. We build motor control centers, VFD panels, PLC panels, HVAC control panels, pump control panels, and specialty applications for hazardous locations. UL698A certification supports hazardous location work.

Transformer Services

Transformer installation, service, and testing across the industrial and utility range.

Medium Voltage Drive Systems

MV drive system installation, commissioning, and service. Our MV motor repair capability includes rewind capability for MV motors at the largest ratings in the market.

Predictive Maintenance

Predictive and condition-based maintenance services including vibration analysis, thermography, oil analysis, motor current signature analysis, and partial discharge testing. We help customers move from reactive to proactive maintenance strategies through structured programs that fit their equipment criticality and business realities.

Field Services

Field service technicians dispatched from all eight Centers of Excellence provide installation, troubleshooting, emergency response, and planned maintenance across the six-state footprint. Our field teams work on motors, gearboxes, VFDs, control systems, and complete drive train installations.