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

Moment Energy

Series A in 2025
Moment Energy specializes in battery energy storage systems that utilize repurposed electric vehicle batteries. Its solutions aim to provide clean, reliable, and cost-effective energy storage for both on-grid and off-grid applications.

Kopperfield

Seed Round in 2022
Kopperfield operates a platform that simplifies home electrification for contractors and consumers. It connects consumers with qualified contractors and uses software for digital site audits, online proposals, multi-channel communication, and payments infrastructure.

Fleetzero

Venture Round in 2022
Founded in Auburn, Alabama in 2021, Fleetzero develops a fleet of electric cargo ships to decarbonize ocean freight. Its vessels offer lower operational costs and higher reliability than traditional fossil-fuel ships.

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.

Helio Home

Seed Round in 2021
Helio is a company focused on facilitating the transition from fossil fuels to complete electrification of homes. It operates an innovative online platform that provides customers with a straightforward and cost-effective approach to achieve whole-home electrification. The platform integrates various systems including solar energy, heating and cooling, electrical systems, insulation, and ventilation, ensuring a holistic design for energy efficiency. By promoting the use of electric solutions, Helio aims to help customers reduce their carbon footprints and minimize reliance on fossil fuels, contributing to a more sustainable future.

Moment Energy

Seed Round in 2021
Moment Energy specializes in battery energy storage systems that utilize repurposed electric vehicle batteries. Its solutions aim to provide clean, reliable, and cost-effective energy storage for both on-grid and off-grid applications.

WattBuy

Series A in 2021
WattBuy is a technology company focused on providing households with access to cleaner and more affordable electricity. Headquartered in New York City, Washington D.C., and Seattle, the company comprises a team of product leaders and engineers with backgrounds from major tech firms. WattBuy has developed an electricity management platform that allows users to take control of their electricity consumption. Through a personalized recommendation engine, the platform helps residents select electricity plans tailored to their preferences and usage patterns, enabling them to save money and switch to the most cost-effective suppliers in their regions. The company's mission centers on leveraging technology to address energy inequality and contribute positively to climate change.

LevelTen Energy

Series C in 2021
LevelTen Energy is a Seattle-based company that operates a renewable energy transaction marketplace platform. Founded in 2016, it facilitates connections between corporate and industrial power buyers and utility-scale wind, solar, and storage projects. The platform enables these buyers to access power purchase agreements (PPAs), providing financial security through fixed-price renewables and the economic advantages of large-scale projects. LevelTen Energy equips renewable energy buyers, advisors, and sellers with tools and services to expedite better deals.

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.
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