What McNally Construction does

McNally Construction, operating legally as McNally International, Inc., is a Canadian heavy civil engineering contractor founded in 1949 (originally as S. McNally & Sons Limited) and headquartered in Hamilton, Ontario. The company specializes in two core disciplines: tunnel construction and marine construction. Tunneling services employ multiple methods including Earth Pressure Balance Tunnel Boring Machines (Lovat EPB TBMs), drill and blast, NATM, and microtunneling, applied across transportation (subways, pedestrian tunnels) and utility (water, sewer, steam, power) end uses. Marine construction spans docks, wharfs, seawalls, shoreline protection, intakes, outfalls, pipelines, and dredging across the Great Lakes, St. Lawrence River, and Eastern Canada. Supporting service lines include marine dredging, environmental remediation (contaminated sediment, habitat compensation), customized concrete structures (including in-house precast concrete segmental liner manufacturing), and equipment sales and rentals.

The company operates a best-equipped marine fleet in Eastern Canada and performs major equipment overhauls in-house (TBMs, crawler cranes, tug boats), creating capital-intensive scale barriers. District offices in Hamilton (HQ), Dartmouth NS (Atlantic Canada), Westlake OH, and Cleveland OH support operations across Canadian provinces (Ontario, Nova Scotia, New Brunswick, Quebec, PEI, BC, Alberta) and US states (Ohio, Illinois, Texas, Washington, Alabama, Kentucky, North Carolina, Minnesota). McNally Tunneling Corporation, established in the 1980s, handles US-based tunneling.

McNally generates revenue primarily through project-based heavy civil construction contracts — lump-sum and unit-price, awarded via competitive public tender, design-build, design-build-finance, or direct negotiation. Customers are predominantly municipal, regional, and federal government entities (Toronto Transit Commission, Region of Peel, City of Edmonton, Halifax Port Authority, Greater Vancouver Water District, PWGSC), plus port authorities and select industrial/resource clients (Nova Scotia Power, Lafarge). Each project is a discrete, one-time engagement with no recurring revenue stream. Since 2011, McNally has been a wholly-owned subsidiary of Weeks Marine; in 2023, Weeks Marine was acquired by Kiewit Corporation, placing McNally within one of North America's largest diversified construction organizations. McNally holds ISO 9001, ISO 14001, and ISO 45001 certifications and operates under an Incident and Injury-Free safety culture.

Name

McNally Construction

Legal name

McNally International, Inc.

Website

https://mcnallycorp.com

Company type

Private

Founded year

1949

Operating status

Operating

Headcount range

101–250 employees

Short description

McNally Construction is a Canadian heavy civil contractor specializing in tunnel construction (TBM and drill-and-blast) and marine infrastructure (docks, wharfs, dredging). Founded in 1949 and headquartered in Hamilton, Ontario, it serves municipal governments, port authorities, and transit commissions across Canada and the United States.

Ownership category

akta.pro rank

Product category

Heavy Civil Construction Services

NAICS

Heavy and Civil Engineering Construction (237), Water and Sewer Line and Related Structures Construction (237110), Site Preparation Contractors (23891)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Subsea & Nearshore Civil Works (Trenching, Rock Placement, Mattressing) (IMAFAJAI)

akta.pro secondary industries

Storage & Conveyance Structures (Reservoirs, Tanks, Culverts, Tunnels) (IMAFAGAE), Mine Construction & Development Contracting (Shaft Sinking, Tunneling, Pre-Strip, Civil Works) (IMAKAKAG), Concrete Pipe, Box Culverts & Drainage Structures (IMADAAAD)

Keywords

• Tunnel construction services
• Marine construction services
• Heavy civil engineering
• Underground infrastructure
• Dredging and marine works

Headquarters

HQ city

Hamilton

HQ country

Canada

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Others

Revenue model

1. Heavy Civil Construction Contracts: Revenue generated from lump-sum and unit-price construction contracts for tunnel, marine, and civil infrastructure projects. Contract types include conventional bid, design-build, design-build-finance, and negotiated contracts. Projects are typically one-time engagements with government and private sector clients.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

McNally Construction is a heavy civil engineering contractor that self-performs tunnel construction (transportation and utility tunnels via TBM, drill and blast, and NATM methods) and marine construction (docks, wharfs, seawalls, shoreline protection, intakes, outfalls, pipelines, and dredging). Services include in-house precast concrete segmental liner manufacturing, environmental remediation (contaminated sediment and habitat compensation), and custom concrete structures, delivered via conventional bid, design-build, design-build-finance, and negotiated contracts across Canada and the United States.

Product overview

McNally Construction (operating as McNally International Inc.) is a heavy civil engineering construction company offering specialized services through distinct divisions. The core offerings consist of Tunneling Services (both transportation and utility tunneling, including design-build projects using various methods such as EPB TBMs, drill and blast, and microtunneling), Marine Construction (including docks, wharfs, seawalls, shoreline protection, intakes, outfalls, and pipelines), Marine Dredging, Environmental Remediation, and Concrete Customized Structures (including precast segmental tunnel liners). The company also operates an Equipment division for sales and rentals of marine vessels and construction equipment. Projects range from conventional bid to design-build, design-build-finance, and negotiated contracts throughout Canada and the United States.

Differentiator

Problem solved

Functional benefit

Products and services

• Tunneling Services Tunnel construction services using a wide range of tunneling methods (TBM, drill and blast, NATM, microtunneling) for utilities (water, sewer, steam, power transmission) and transportation (subways, traffic, pedestrian walkways). Recognized as Canada's leading tunnel contractor with operations in Canada and the United States via McNally Tunneling Corporation based in Cleveland, OH.
• Marine Construction Marine construction services including docks, wharfs, seawalls, shoreline protection, marine intakes, outfalls, and pipelines. McNally's marine operations are among the best equipped and manned construction fleets in Canada, capable of completing projects throughout the Great Lakes, St. Lawrence River, and Eastern Canada.
• Marine Dredging Marine dredging services for harbours, channels, and waterways maintenance and expansion, including maintenance dredging projects such as the St. Clair River.
• Environmental Remediation Environmental remediation services including contaminated sediment removal, habitat compensation projects (HADD), groundwater collection systems, and water treatment facility construction.
• Concrete Customized Structures Customized concrete structure construction including segment casting for tunnel linings and specialized detention tanks. Supported by in-house manufacturing of precast concrete segmental liners.
• Equipment Sales and Rentals Sales and rental of marine vessels, cranes, and construction equipment, supported by in-house major equipment overhauls and rebuilds including Tunnel Boring Machines, large crawler cranes, and tug boats.

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Six partnerships are on record, tiered core, major and minor.

• Healy Tibbitts BuilderscoreStrategic or Co-development PartnerHealy Tibbitts Builders, Inc. is a major subsidiary of Weeks Marine alongside McNally International. Healy Tibbitts operates in Hawaii and the Pacific region, extending the combined organization's geographic reach.
• Aecon Group Inc.majorStrategic or Co-development PartnerMcNally / Aecon Joint Venture was formed for the Bathurst Collector and Langstaff Trunk Sewer Project (York Region). This joint venture combined McNally's tunneling expertise with Aecon's civil construction capabilities for a major design-build trunk sanitary sewer project.
• MacViro Consultants Inc.minorStrategic or Co-development PartnerMcNally / Aecon Joint Venture partnered with MacViro Consultants Inc. for engineering and design services on the Bathurst Collector and Langstaff Trunk Sewer Project in Vaughan, Ontario.
• Weeks Marine Construction DivisioncoreStrategic or Co-development PartnerWeeks Marine's Construction Division, combined with McNally's tunneling capabilities, creates a comprehensive civil and marine construction offering. Projects span from inland waterways to off-shore sites in the Pacific and Atlantic oceans.
• Weeks Marine Dredging DivisioncoreStrategic or Co-development PartnerWeeks Marine's Dredging Division, operating alongside McNally's marine and tunnel capabilities, provides a full range of maritime construction services from one of the most well-equipped fleet operations in North America.
• Weeks Marine Marine Services DivisioncoreStrategic or Co-development PartnerWeeks Marine's Marine Services Division complements McNally's capabilities, enabling the combined organization to serve as a one-stop shop for clients in both private and governmental sectors throughout North and South America.

Scale indicators4 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Aecon Group: Major Canadian heavy civil and industrial construction contractor with overlapping tunneling, utility, and transportation infrastructure work. Aecon partnered with McNally on the Bathurst Collector and Langstaff Trunk Sewer JV and competes head-to-head on many of the same Ontario transit and water tenders.
• Lane Construction Corporation: US-based heavy civil contractor specializing in tunneling, water conveyance, and underground infrastructure. Comparable scope to McNally's utility and transportation tunneling franchise and a frequent bidder on the same North American transit and water projects.
• Weeks Marine: Direct parent company with overlapping dredging, marine construction, and heavy civil capabilities; combined operations under Kiewit mean Weeks and McNally frequently deliver joint marine-plus-tunnel solutions to the same public-sector clients.
• Great Lakes Dredge & Dock Corporation: Largest US dredging and marine construction contractor with a directly comparable marine fleet and harbor/port maintenance franchise. Competes with McNally for Great Lakes, St. Lawrence, and Atlantic seaboard marine infrastructure contracts.
• Healy Tibbitts Builders: Sibling subsidiary under Weeks Marine focused on marine construction in Hawaii and the Pacific region. Shares McNally's capabilities in caissons, wharves, and marine infrastructure but covers a complementary geographic footprint.

Broad incumbents

• Strabag AG: European-based global construction group with one of the world's largest tunneling divisions. Competes on large-diameter transit, rail, and hydro tunnel projects across North America and brings deeper international TBM expertise and balance sheet than McNally.
• Skanska USA Civil: Diversified global construction group with a significant North American civil and tunneling practice. Competes on large transit, highway, and water tunnel megaprojects alongside McNally's US operations.
• Dragados USA: Spanish-based heavy civil contractor with extensive North American tunneling experience, particularly on transit, rail, and water projects. Represents deep-pocketed international competition on the larger design-build tenders McNally targets.

Emerging players

• EllisDon Corporation: Canadian construction and civil infrastructure firm with growing presence in tunneling, water, and transit work. Competes with McNally in Ontario and Western Canada on selected heavy-civil tenders.

Others

• Hatch Ltd. Canadian engineering and project management firm active in water, mining, and infrastructure sectors. Acts as both a design partner to McNally and a competitor on design-build pursuits where it brings engineering-led delivery capabilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about McNally Construction