Commercial mechanical systems installation
STL
St. Louis, MO
Who We Are

Built on
Legacy.
Scaled for
Industry.

Marick Mechanical carries forward a long tradition of commercial mechanical excellence in the St. Louis region — operating formerly as Bieg Plumbing & Mechanical. We are a multi-location commercial contractor built to handle the scale and complexity that industrial, institutional, and commercial facilities demand.

We serve a B2B client base: facility managers, property owners, general contractors, and project managers who need a reliable single-source mechanical partner — from design-build and new construction through ongoing maintenance and equipment replacement.

  • Full-service commercial, industrial & institutional mechanical work
  • Multi-location contractor — coverage across the St. Louis metro area
  • Eight integrated service lines under a single contractor relationship
  • Formerly Bieg Plumbing & Mechanical — proven regional track record
  • In-house sheet metal fabrication for custom mechanical solutions
What We Do

Eight
Service Lines.
One Contractor.

From commercial HVAC and plumbing through refrigeration systems, building automation, and custom sheet metal — Marick Mechanical delivers integrated mechanical solutions for facilities that cannot afford downtime or half-measures.

Commercial HVAC

Installation, repair, and preventive maintenance of commercial heating, ventilation, and air conditioning systems. Rooftop units, air handlers, chillers, and VAV systems.

Commercial Plumbing

Full-scope commercial plumbing for new construction, tenant build-outs, renovations, and ongoing maintenance for commercial and institutional facilities.

Refrigeration Systems

Commercial and industrial refrigeration installation and service. Cold storage, food service equipment, process cooling, and specialty refrigeration applications.

Building Controls & Automation

Building automation system (BAS/BMS) installation, integration, and service. Centralized monitoring and control for HVAC, energy management, and facility systems.

Mechanical Construction

Design-build and plan-spec mechanical construction for ground-up commercial, industrial, and institutional projects. Coordinated delivery from rough-in through commissioning.

Equipment Sales

Commercial HVAC and plumbing equipment supply. Access to major manufacturers for replacement units, upgrade projects, and new construction equipment procurement.

Sheet Metal Fabrication

In-house custom ductwork, plenums, ventilation components, and specialty sheet metal fabrication for commercial HVAC and industrial ventilation applications.

Industrial & Institutional

Specialized mechanical services for industrial manufacturing, healthcare facilities, educational institutions, government buildings, and other mission-critical environments.

Why Marick

Single-Source
Mechanical
Authority

Managing multiple subcontractors across mechanical trades creates coordination gaps, scheduling conflicts, and accountability voids. Marick Mechanical eliminates that complexity — one relationship, one point of contact, eight service lines.

Legacy of Regional Trust

Formerly Bieg Plumbing & Mechanical, Marick Mechanical carries decades of earned credibility with St. Louis facility operators, building owners, and general contractors.

Integrated Multi-Trade Capability

HVAC, plumbing, refrigeration, controls, construction, equipment supply, and sheet metal — executed by a single contractor. Fewer vendors, cleaner projects, clearer accountability.

Built for Complex Facilities

Our focus is commercial, industrial, and institutional work — the large-scale, multi-system environments where technical depth and project management discipline matter most.

In-House Fabrication Advantage

Custom sheet metal fabricated in-house means faster lead times, tighter tolerances, and bespoke solutions for non-standard mechanical configurations — without outsourcing delays.

Sectors Served

The Facilities We Serve

Marick Mechanical works across the full spectrum of commercial, industrial, and institutional facility types — anywhere complex mechanical systems require professional-grade expertise.

Office & Corporate

Multi-tenant office buildings, corporate campuses, and mixed-use commercial properties requiring scalable, energy-efficient mechanical systems.

Healthcare & Medical

Hospitals, clinics, and medical office buildings with critical environment requirements — precision humidity control, medical-grade plumbing, and compliance-driven systems.

Education & Institutional

K-12 schools, universities, and government facilities requiring durable, code-compliant mechanical systems with long service life and low lifecycle cost.

Industrial & Manufacturing

Factories, warehouses, and manufacturing plants with process cooling, ventilation, industrial refrigeration, and heavy-duty plumbing requirements.

Retail & Food Service

Grocery stores, restaurants, and food processing facilities with refrigeration systems, grease abatement, commercial kitchen ventilation, and temperature-critical environments.

Multi-Family & Mixed-Use

Apartment complexes, condominiums, and mixed-use developments requiring centralized mechanical systems, in-unit HVAC, and building-wide plumbing infrastructure.

Common Questions

What Facility
Managers
Ask Us

Direct answers to the most common questions about commercial mechanical contracting in St. Louis and Missouri.

Speak with our team
1-800-368-6705

Available for project inquiries, service calls, and equipment quotes across the St. Louis metro area.

Marick Mechanical — formerly Bieg Plumbing & Mechanical — is a full-service commercial HVAC contractor serving the greater St. Louis metropolitan area, including St. Louis City, St. Louis County, St. Charles County, Jefferson County, and surrounding Missouri communities. We handle commercial, industrial, and institutional facilities of all scales, from single-building offices to large multi-facility campuses.
Commercial HVAC maintenance costs vary significantly based on system size, equipment count, facility type, and the scope of your maintenance agreement. Preventive maintenance contracts can range from a few hundred dollars per unit annually for routine seasonal inspections to comprehensive multi-system agreements covering large industrial or institutional facilities. We recommend a site assessment to provide an accurate proposal. Contact us at 1-800-368-6705 to discuss your facility's needs.
Building controls and automation (BAS or BMS — Building Automation System / Building Management System) refers to centralized, computerized systems that monitor and manage a building's mechanical systems including HVAC, plumbing, refrigeration, lighting, and energy usage. Marick Mechanical installs and services controls systems that optimize energy efficiency, reduce operating costs, enable remote monitoring, and give facility managers real-time visibility and control over their entire mechanical infrastructure.
Marick Mechanical is an established commercial and industrial refrigeration contractor in the St. Louis region. We service refrigeration systems for food service establishments, cold storage facilities, manufacturing operations, and other commercial clients. Our team handles installation, preventive maintenance, and emergency repair of commercial refrigeration equipment — from walk-in coolers and freezers to large-scale industrial process refrigeration systems.
Licensed commercial plumbing contractors in Missouri must hold state and local licenses for commercial-scope work, which requires higher qualifications than residential plumbing licensing. Marick Mechanical is a licensed commercial plumbing contractor serving the St. Louis metropolitan area. You can verify contractor licensing in Missouri through the Missouri Division of Professional Registration. When evaluating commercial plumbing contractors, ask about their commercial project experience, licensing status, and whether they also handle HVAC and other mechanical trades — as a single-source contractor can significantly reduce project coordination costs.
Commercial HVAC systems are fundamentally different from residential systems in scale, complexity, equipment type, and regulatory requirements. Commercial systems typically include rooftop units (RTUs), chillers, cooling towers, Variable Air Volume (VAV) systems, air handling units, and building automation integration. They serve larger, more complex spaces with varying occupancy loads and stricter code requirements. Commercial HVAC contractors must have specialized training, licensing, and project management capabilities well beyond residential HVAC — Marick Mechanical focuses exclusively on commercial, industrial, and institutional mechanical systems.
Yes — and that is one of our core advantages. Marick Mechanical is a multi-trade mechanical contractor offering commercial HVAC, plumbing, refrigeration, building controls and automation, mechanical construction, equipment sales, and sheet metal fabrication under one roof. This integrated capability means a single contractor relationship can manage complex multi-system projects, eliminating the coordination overhead, scheduling conflicts, and accountability gaps that arise from managing multiple specialty subcontractors.
Sheet metal fabrication in commercial HVAC is used to manufacture custom ductwork, plenums, air distribution components, ventilation housings, and specialty enclosures for mechanical systems. In-house fabrication allows Marick Mechanical to produce custom-dimensioned components for unique building geometries, industrial applications, and replacement parts that may not be available as standard off-the-shelf products — resulting in faster project turnaround, tighter quality control, and solutions that fit precisely rather than requiring field modifications.

Ready to Discuss
Your Project?

From routine maintenance to full-scale mechanical construction — our team is ready to evaluate your facility's needs and provide an accurate proposal.

1-800-368-6705 Email Our Team