What Mass. Electric Construction Co does

Mass. Electric Construction Co. (MEC) is a North American electrical contractor and engineering services firm founded in 1928 in Boston and operating as a wholly owned subsidiary of Kiewit Infrastructure Co. since 1992. Headquartered in Waltham, Massachusetts, MEC self-performs large-scale electrical construction across three core market verticals: Transportation & Transit (rail systems, traction electrification, train control/signaling, communications, and overhead catenary for transit authorities); Industrial & Power (power generation, renewable energy, refineries, LNG facilities, water treatment, and cogeneration); and Power Delivery (transmission, substations from 4kV to 500kV, distribution, underground and submarine cables). The firm employs 1,001–5,000 staff and operates from nine regional offices across the United States, Canada, and Mexico.

MEC's business model is project-based, generating revenue through fixed-price contracts, EPC arrangements, design-build/progressive design-build, and time-and-materials agreements acquired via competitive bidding on public sector work and direct negotiation with private industrial clients. The firm provides integrated design, engineering, procurement, and construction (EPCC) services supported by long-term IBEW union craft workforce relationships and an in-house training pipeline. Notable clients include Sound Transit, WMATA, OC Transpo, Houston Metro, AES, Competitive Power Ventures, National Grid, City of San Diego, and the National Park Service. Public-sector and government work dominates the customer base, with marquee executions spanning the Central Artery/Tunnel, Leonard Zakim Bridge, the 14.5-mile Sound Transit East Link Extension, and the 1,050-MW Fairview Energy Center.

Revenue, backlog, and bonding capacity are not publicly disclosed. The company differentiates through self-perform execution (minimizing subcontractor dependence), integrated design-build delivery, and 96 years of operational history that pre-qualifies the firm for complex, schedule-sensitive megaprojects. The firm maintains no public software products, APIs, or AI/ML-driven platforms; its competitive position rests on craft labor, engineering integration, and execution track record rather than technology differentiation.

Name

Mass. Electric Construction Co

Legal name

Mass. Electric Construction Co.

Website

https://masselec.com

Company type

Private

Founded year

1928

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Mass. Electric Construction Co. (MEC) is a North American electrical contractor and engineering firm founded in 1928, operating as a Kiewit subsidiary. It self-performs large-scale transit rail, industrial, and power delivery electrical construction for government agencies, utilities, and industrial clients across the US, Canada, and Mexico.

Ownership category

akta.pro rank

Product category

Electrical Construction & Engineering Services

NAICS

Power and Communication Line and Related Structures Construction (237130), Heavy and Civil Engineering Construction (237), Utility System Construction (2371)

SIC

Electrical Work (1731), Heavy Construction Other Than Bldg Const - Contractors (1600), Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Power Plant Electrical Systems EPC (Switchyard, Transformers, Protection & Controls) (EUAEAAAM)

akta.pro secondary industries

Substation EPC & construction (AIS/GIS, greenfield/brownfield) (EUADAKAC), Rotating/Static Equipment Installation & Alignment (Pumps, Compressors, Fans, Skids) (EUAEAFAH), MEP (Mechanical, Electrical & Plumbing) Engineering Consulting (BPAHAIAE)

Keywords

• Electrical construction services
• Transit rail systems
• Industrial electrical contracting
• Power delivery infrastructure
• Design-build EPC services

Headquarters

HQ city

Waltham

HQ country

United States

HQ region

North America

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure

Revenue model

1. Electrical Construction Services: Project-based revenue from providing large-scale electrical construction and engineering services. Revenue is earned through fixed-price contracts, EPC arrangements, and time-and-materials agreements for infrastructure projects across transportation, industrial, and power delivery markets. Projects range from small upgrades to multi-billion dollar infrastructure megaprojects.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Mass. Electric Construction Co. (MEC) provides large-scale electrical construction and engineering services across North America, organized around three core service lines: Transportation & Transit Electrical Services (rail systems installation, traction electrification, train control/signaling, communications); Industrial Electrical Services (power generation, renewable energy, refineries, water treatment, heavy industrial); and Power Delivery Services (transmission, substations, distribution, underground and submarine cable installation). The company self-performs the majority of electrical installation work and delivers integrated design, engineering, procurement, and construction (EPCC) solutions.

Product overview

Mass. Electric Construction Co. (MEC) is not a software product company but rather an electrical contracting and engineering services firm providing large-scale electrical construction and maintenance for projects of all sizes across North America. The company's service portfolio consists of three core service lines: Transportation & Transit Electrical Services (including rail systems, traction electrification, train control/signaling, and communications), Industrial Electrical Services (covering power generation, renewable energy, refineries, and water treatment), and Power Delivery Services (transmission, substations, distribution, and submarine cables). These core services are supported by specialized sub-service offerings including Power & Energy, Renewable Energy, Water-Related Infrastructure, Commercial/Federal projects, Oil/Gas/Chemical, Highway & ITS (Intelligent Transportation Systems), and Electric Vehicle Infrastructure. MEC self-performs the majority of their work and provides integrated design, engineering, procurement and construction (EPCC) services focused on best-for-project solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• Transportation & Transit Electrical Services

Quantifiable outcome

• Successfully completed major infrastructure projects including the Central Artery/Tunnel and Leonard Zakim Bridge in Boston, Metro-Dade transit work in Miami, and nationwide rail systems installations

Named customers10 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators2 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• MYR Group: A publicly-traded specialty contractor serving electrical infrastructure markets including transmission, distribution, substation, and commercial/industrial work. Directly comparable in scope of electrical construction services and customer base.
• Quanta Services: The largest publicly-traded US infrastructure construction firm focused on electric power, oil & gas, and communications. Directly comparable as a North American electrical infrastructure contractor serving utilities and transit authorities with similar self-perform capabilities.
• MasTec: A large publicly-traded infrastructure construction company with significant power delivery, communications, and oil & gas operations. Comparable as a North American EPC contractor serving utility and energy clients with similar capabilities.
• Rosendin Electric: A privately-held employee-owned electrical contractor with significant work in transmission, substation, renewable energy, and commercial construction. Comparable to MEC in self-perform electrical construction capabilities and project scale.
• EMCOR Group: A leading provider of electrical and mechanical construction, energy, and facilities services. Directly comparable as a large-scale specialty contractor serving commercial, industrial, utility, and infrastructure clients across North America.
• IES Holdings: A national provider of electrical and mechanical contracting services for commercial, industrial, and infrastructure markets. Directly comparable as a US electrical contractor with similar project types and customer profile.
• Faith Technologies: A large privately-held electrical and specialty systems contractor serving commercial, industrial, healthcare, and renewable energy markets. Comparable as a North American electrical contractor with similar design-build capabilities.

Broad incumbents

• Tutor Perini: A large publicly-traded civil, building, and specialty construction company executing major transit, tunneling, and infrastructure projects. Comparable as a participant in large transit megaprojects, though with broader civil construction focus beyond electrical scope.
• Black & Veatch: A global employee-owned engineering, procurement, construction, and consulting firm with major power and water infrastructure practices. Comparable in power generation EPC, transmission, and water treatment electrical work, though with broader global scale.
• Burns & McDonnell: A major employee-owned engineering, architecture, and construction firm with significant power, transmission, and infrastructure practices. Comparable to MEC in serving utilities and transit authorities, though with a broader engineering consultancy business.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/kiewit
• Facebookfacebook.com/kiewit
• LinkedInlinkedin.com/company/mass-electric-construction

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries1 record

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 Mass. Electric Construction Co