MCJ

Founded in 2019, MCJ is a venture capital firm based in Boston, Massachusetts. The company focuses on investing in technology startups that drive industrial transformation and infrastructure resilience, aiming to make industries cleaner, more profitable, and more resilient.

David Aronoff

Chairman and Managing Partner

Cody Simms

Managing Partner

Past deals in Utilities

Exowatt

Series A in 2025
Exowatt is a next-generation renewable energy company that specializes in providing sustainable energy solutions for commercial and industrial applications. The company develops a modular full-stack energy system that consists of a heat collector, a heat battery, and a heat engine. This innovative system is designed to deliver dispatchable power and heat, ensuring that energy is consistently available to meet the demands of energy-intensive operations, such as data centers. By focusing on modularity and efficiency, Exowatt aims to enhance the accessibility and reliability of renewable energy, facilitating a transition towards more sustainable energy practices in various industries.

David Energy

Series A in 2022
David Energy is an innovative energy company that optimizes electricity consumption and management via advanced software and hardware solutions. It aims to reduce costs, increase renewable energy adoption, and enhance sustainability through smart energy management.

Overstory

Seed Round in 2021
Overstory is a vegetation management software company that serves electric utilities. The platform integrates artificial intelligence with remote sensing from satellite and aerial imagery to monitor vegetation near power corridors, assess wildfire risks, and optimize resource use. By prioritizing vegetation risks before they materialize, Overstory helps utilities prevent outages, reduce wildfire risk, and improve reliability and safety across service areas, contributing to a safer, more resilient grid.

David Energy

Seed Round in 2021
David Energy is an innovative energy company that optimizes electricity consumption and management via advanced software and hardware solutions. It aims to reduce costs, increase renewable energy adoption, and enhance sustainability through smart energy management.

Rhizome

Rhizome operates an AI-driven climate resilience platform that assists electric utilities in assessing climate risks with high precision. The platform quantifies the economic and social impacts of infrastructure investments aimed at bolstering climate resilience for both communities and businesses. By identifying vulnerabilities to climate threats and measuring the benefits of grid-enhancing projects, Rhizome enables its clients to mitigate the costs associated with damage and recovery from extreme weather events. Additionally, the platform supports clients in justifying public projects to policymakers, potentially increasing local infrastructure spending and enhancing access to federal grant funding. Through its innovative solutions, Rhizome aims to protect communities and businesses from the increasing challenges posed by climate change.

The Nuclear Company

A firm specializing in large-scale nuclear deployment, aiming to construct multiple nuclear power plants across the United States. Its focus is on fleet-scale nuclear power generation to provide safe, reliable, and low-cost electricity with zero greenhouse gas emissions.
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