Empowering a Brighter Future

Louth Callan is a seasoned power infrastructure construction firm based in New England, specializing in the engineering, procurement, and construction of utility-scale power systems. Our expertise spans across transmission and distribution infrastructure, substations, combined heat and power, and renewable systems including solar, storage, hydroelectric, and geothermal assets.

We deliver comprehensive solutions across the full project lifecycle, offering pre-construction services, turnkey EPC execution, repowering initiatives, and long-term operations and maintenance (O&M). Our work is tailored to meet the specific needs of Independent Power Producers (IPPs), Utilities, Developers, and Power Infrastructure Investors, ensuring scalability, regulatory alignment, and enduring value.

At the heart of every Louth Callan project is a core belief that the most successful outcomes are built through True Partnerships. These relationships fuel deeper insights, more innovative solutions, and long-lasting impact for the communities and customers we serve. We take pride in pushing the boundaries of what’s possible, delivering performance, driving innovation, and continually raising the standard for power infrastructure excellence.

4.8
GW Capacity Installed

800MW
Battery Storage Capacity Installed

Nationwide
Coverage

$5B+
Total Value of Energy Projects Placed in Service

Our Focus

Designing, constructing and operating renewable energy assets is what we do. We support you every step of the way helping to maximize your asset’s profitability and performance.

Solar

Solar systems offer a wide range of benefits, making them a key component in the transition toward sustainable energy.

Battery Storage

Battery Storage Systems (BESS) have become and essential part of maximizing the potential of PV solar systems.

Transmission & Substation

With experience spanning 115kV to 500kV systems, our team is a leading transmission and substation construction contractor.

Geothermal

Geothermal energy is a sustainable power source that utilizes the heat stored beneath the Earth’s surface.

O&M

Our Operations and Maintenance (O&M) solution is customized to ensure the highest performance of your renewable asset.

Engineering

Through Engineering as a Service (EaaS), we deliver tailored engineering support across all phases of a project.

Who We Are

Louth Callan – Power Infrastructure Built to Last

Louth Callan is a full-service power infrastructure construction firm, specializing in the delivery of complex, utility-scale energy systems across the United States. From high-voltage transmission lines and substations to distribution systems and grid interconnection assets, we build the critical infrastructure that keeps the nation powered.

Our focus is on constructability, precision, and executional excellence. We deliver turnkey projects—from greenfield development through commissioning—designed to meet the evolving needs of utilities, grid operators, developers, and industrial clients with reliability and discipline.

Comprehensive Capabilities & Vertically Integrated.

Louth Callan brings a construction-first approach backed by full lifecycle integration. Our in-house teams manage every phase of infrastructure development:

  • Pre-construction & Permitting – initial site layout, constructability reviews, environmental studies, and utility coordination
  • Engineering, Procurement & Construction (EPC) – fully coordinated designs and disciplined field execution of power sources and infrastructure. 
  • Union and non-union affiliations – we build the best because we have the best
  • Grid Infrastructure Delivery – substations, switchyards, transmission, distribution, and interconnection systems
  • Modernization & Maintenance – asset upgrades, repowering, and long-term O&M programs

     

This integration provides schedule control, cost certainty, and consistent quality, regardless of project size or system complexity.

Performance, Safety, and Precision

Jobsite safety and construction quality are foundational to everything we do. We support every project with:

  • Robust pre-construction planning
  • Thorough geotechnical and civil evaluations
  • Systematic project controls and QA/QC frameworks
  • Skilled field crews trained to meet the highest industry standards

With a proven record of delivering infrastructure on time and within budget, we serve as a dependable partner in high-stakes, high-value energy construction.

Building the Backbone of the Power Grid

At Louth Callan, we don’t just build projects—we construct the backbone of the power grid. Our infrastructure supports the full spectrum of energy delivery, from traditional generation to advanced grid solutions.

Whether modernizing aging assets or building new  capacity, our commitment to craftsmanship, operational excellence, and long-term value ensures our projects serve reliably for decades to come.

Our Core Values

Join Us

Come grow and help the world go green with us.

Louth Callan is an equal opportunity employer. We are always looking for professionals to help shape a team that is transforming the world of energy into a sustainable, earth friendly, renewable power supply. At Louth Callan, you will find opportunities to be recognized for your skills in a collaborative team environment.

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