Midwest Specialty Contractors Post Revenue Surge as Data Centers Drive Growth
Data center construction is turning into the biggest revenue driver for Midwest specialty contractors, but the boom is arriving alongside cost pressures that are eating into margins, according to ENR Midwest’s 2026 Top Specialty Contractors rankings.
The 52 firms on this year’s list posted combined regional revenue of $12.38 billion for 2025, up from $10.34 billion the year before, ENR Midwest reports. That’s growth of roughly 20% in a single year, a pace that outstrips what most construction segments have managed in recent cycles.
Background
ENR Midwest’s rankings capture two of the region’s largest players by way of example. Freeport, Illinois-based Helm Group, a mechanical, civil, plumbing and electrical firm and ENR’s 2022 Midwest Specialty Contractor of the Year, reported $900 million in 2025 revenue. CEO Brian Helm told ENR Midwest that data centers have been the busiest sector for his traveling mechanical and electrical crews, with stadium, airport and health care work also strong. Helm Group is currently working on air handling system replacements and high-temperature water generator plant overhauls at O’Hare International Airport, along with HVAC work on the $600 million renovation of the University of Nebraska’s Memorial Stadium in Lincoln.
ERMCO, an employee-owned electrical contractor based in Greenwood, Indiana, and ENR’s 2025 Midwest Specialty Contractor of the Year, posted nearly $363 million in regional revenue. CEO David Peterson told ENR Midwest that 2025 was a record year and that the company carried its largest-ever backlog into 2026. Peterson pointed to the same growth sectors Helm identified, health care, industrial, life sciences and especially data centers, which he called “a game changer.” ERMCO currently serves as the primary electrical, technology and low-voltage contractor on the joint Signia by Hilton hotel and Indiana Convention Center expansion project in Indianapolis.
Both executives flagged cost and labor headwinds. Helm said labor, fuel and copper prices have outpaced the consumer price index and hurt margins on much of his firm’s work. He also said higher interest rates have caused some customers to pull back, and that his firm now tracks a rising ratio of “budget-round” projects, ones that get priced but never built once owners see costs, against projects that actually get awarded. Peterson said ERMCO has responded by staying close to vendors and manufacturers and by tightening accounts payable and cash flow management.
Analysis
The gap between revenue growth and reported margin pressure is the real story here. A 20% jump in combined revenue across 52 firms signals plenty of work in the pipeline, but Helm’s comments about copper, fuel and labor costs outpacing inflation indicate that top-line growth isn’t translating one-for-one into profitability. That’s a familiar pattern when a hot sector, in this case data centers, pulls contractors toward premium-priced but resource-intensive work at the same time input costs are climbing.
The interest rate dynamic Helm describes is worth watching closely. His mention of a rising ratio of priced-but-unbuilt projects suggests that even in a strong revenue year, a meaningful share of pipeline work is evaporating before it reaches award stage. For subcontractors bidding on non-data-center work, particularly commercial and some industrial projects where owners are more rate-sensitive, that could mean more time spent on budget estimates that never convert to signed contracts.
Labor strategy also stands out as a differentiator between the two companies profiled. Helm Group’s fully union workforce appears to have insulated it somewhat from labor shortage pain, while ERMCO’s growth from about 900 field team members five years ago to roughly 1,200 today reflects an aggressive, multi-year recruiting push that Peterson says is now paying off. That contrast suggests there’s no single labor model working across the Midwest specialty market. Firms that invested early in workforce pipelines, whether through union relationships or in-house recruiting, appear better positioned to capture data center and health care demand without getting caught short-handed.
What It Means for Subcontractors
- Mechanical, electrical and HVAC subs should prioritize data center pipeline opportunities in the Midwest. Helm Group and ERMCO both name data centers as their strongest growth sector for 2025 and into 2026, ahead of stadium, airport, and health care work.
- Firms bidding fixed-price mechanical or electrical packages should factor in copper, fuel, and labor cost volatility now, since Helm Group reports these inputs have outpaced CPI and compressed margins across much of its 2025 work.
- Subs relying on rate-sensitive owners (commercial, some industrial clients) should expect a higher share of budget-round proposals to stall before award. Helm Group tracks this ratio internally and reports it’s at elevated levels due to higher interest rates.
- Electrical and low-voltage contractors eyeing hospitality and convention center work can point to ERMCO’s role on the Signia by Hilton and Indiana Convention Center expansion in Indianapolis as a benchmark for scope and scale in that niche.
- Firms competing for airport modernization work should track O’Hare International Airport’s ongoing terminal upgrades, where Helm Group is handling air handling system replacements and high-temperature water generator plant overhauls, for potential subcontract packages tied to future phases.
- Workforce planning matters as much as bidding strategy. ERMCO grew its field team from about 900 to 1,200 workers over five years through sustained recruiting investment. Non-union subs facing labor shortages should treat that timeline as a realistic benchmark for building capacity ahead of demand rather than reacting to it.
