David Aronoff

Chairman & Managing Partner at MCJ

📍 Greater Boston, United States🔄 Updated September 2026💼 25 investments📅 29 years investing🗓 Last invested Jul 2019𝕏 @upgrade_to_unlock
VC🌍 United States20+ investments
25
Total investments
9
Early stage
0
Mid stage
0
Late stage
29y
Years active

Portfolio

13 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Member
Jul 2019
Aliro, The Quantum Networking Company®, offers AliroNet® to run entanglement-based Quantum Networks for applications such as Quantum Secure Communications (QSC), secure access to clouds and data centers, networking of quantum computers, and networking of distributed quantum sensors. AliroNet is also used to implement comprehensive Advanced Secure Networks which include Post-Quantum Cryptography (PQC). Aliro provides quantum network simulation as a professional service or as an on-premises offer. AliroNet® users include utility companies, telecommunications providers, public sector organizations, enterprises, and researchers who are simulating, designing, piloting, orchestrating, and building the worlds first quantum networks. Visit us at AliroTech.com.
Investor & Co-Founder
Mar 2018
Minim, Inc., (NASDAQ: MINM) was born in 1977 as a networking company and now delivers intelligent software to protect and improve the WiFi connections we depend on to work, learn, and live. Minim’s cloud platform powers intuitive apps and a variety of routers, helping customers take control of their connected experience and privacy. Headquartered in Manchester, N.H., Minim holds the exclusive global license to design and manufacture consumer networking products under the Motorola brand. To learn more, visit https://www.minim.com. MOTOROLA and the Stylized M Logo are trademarks or registered trademarks of Motorola Trademark Holdings, LLC and are used under license.
Board Member
Dec 2012
For IT teams that manage multi-SaaS environments, BetterCloud automates onboarding, offboarding & mid-lifecycle changes, SaaS application access & entitlements, and security policies. Unlike Identity & Access Management solutions that require manual intervention and custom scripting, or IT Service Desk solutions that generate tickets to be manually worked, BetterCloud’s granular, powerful automation and unlimited customizable workflows complement your IAM and help desk automation to improve IT efficiency by reducing up to 78% of SaaS management work. If your IT team is scripting or manually managing access to applications, files, folders, and groups for anyone joining, leaving, or moving inside your organization, you’re throwing talent and resources you can't spare at problems BetterCloud can automate. Our customers tell us they get huge value from BetterCloud because we enable them to: 1. Maximize operational efficiency 2. Accelerate employee productivity 3. Scale IT impact
Board Member and Lead Investor
Oct 2011
When it comes to stability, mobile developers have no visibility into how their apps perform in customers’ hands. Until now. Built by a hardcore team, Crashlytics is an elegant solution to a big data problem. We find the needle in the haystack, even the exact line of code that your app crashed on.
Board Member
Aug 2011
Bitsight is a cyber risk management leader transforming how companies manage exposure, performance, and risk for themselves and their third parties. Companies rely on Bitsight to prioritize their cybersecurity investments, build greater trust within their ecosystem, and reduce their chances of financial loss. Built on over a decade of technological innovation, its integrated solutions deliver value across enterprise security performance, digital supply chains, cyber insurance, and data analysis.
Investor
May 2011
As of July 1, 2013, JouleX, Inc. is acquired by Cisco Systems. JouleX is a leading innovator in sustainable energy management systems for the enterprise. Its flagship solution, the JouleX Energy Manager (JEM), provides the Global 2000 and government agencies with the ability to monitor, analyze and control energy usage for all network-connected devices and systems across the enterprise, including in distributed offices, data centers and facilities. Importantly, JEM is the first network-based energy management system that works without the use of software agents, dramatically reducing installation time and removing the maintenance burden associated with similar technologies. JEM decreases energy costs by up to 60 percent while ensuring availability and provides robust reporting that enables compliance with emerging carbon monitoring requirements. JouleX has been distinguished with recent awards and accolades including Gartner Cool Vendor in Green IT and Sustainability, GE Ecomagination Award, BT Green Economy Success for Future Award and Clean Tech Media Award. For more information, please visit www.joulex.net.
Board Member
Aug 2006
Blackwave makes the first storage and delivery system specifically designed to meet the unique requirements of Internet Video distribution. Integrating intelligent software with standard industry hardware, Blackwave Systems support rapid and strategic scalability and shrink the footprint required video distribution infrastructure by up to 90% and dramatically reduces associated costs.
Board Member
Jan 2006
CHiL Semiconductor Enables Green Computing by delivering exceptionally efficient and intelligent PWM controllers and related products to power CPU's, Graphics Processors, memory banks, ASICs and other high powered devices. Our goal is to significantly reduce wasted energy.
early stageSemiconductors
Board Member
Sep 2005
Vidsys is a leading developer of enterprise security software focused on helping organizations simplify operational security and manage real-time risk. Our Converged Security and Information Management (CSIM) platform integrates, correlates, and visualizes data from virtually any security sensor, system or networked management application via a single, unified platform. Stay connected: https://twitter.com/vidsys https://www.youtube.com/user/VidSysPSIM https://www.facebook.com/VidsysInc/
Board Member
Jul 2003
Ounce Labs, an IBM company, specializes in detecting security vulnerabilities in source code through static analysis (or "white box") techniques. By supporting developers, build teams, security teams, and executives, we help bring security and visibility to more stages of the SDLC and to more stakeholders throughout the organization. We have a 98% annual renewal rate.
Board Member
Dec 2000
Ikanos develops robust, high performance semiconductor and software products that enable network equipment manufacturers and service providers to deliver broadband to the digital home. We’re the world’s top supplier in the VDSL market with more than 80% market share, and a leader in ADSL, with more than 330 million ports shipped to date. We also develop and manufacture advanced network processors and other products that enable the cost-effective delivery of triple- and quadruple-play services. Headquartered in Fremont, Calif., we have offices around the world to service our global customer base. Our engineers are responsible for inventions captured in approximately 400 issued patents and applications. And we lead public standards development by actively participating and contributing to standards bodies such as HomeGrid™, ATIS, Broadband Forum, FSAN, IEEE 802.3, ITU-T, NIPP-NAI, and TTC (Japan).
Board Member
Sep 2000
Board Member
Jun 1998
Experience · 30 entries
All (30)
Investments (24)
Founder (2)
Board (23)
2020
Partner
Oct 2020
MCJ is an early-stage fund for the energy and industry transition and the inevitable impacts of climate change. We discover and invest in startups rewriting industries to be cleaner, more profitable, and more resilient. We strengthen our investments through the MCJ Collective — a vetted member network that connects talented tech and industrial leaders with our portfolio and with one another. Our media platform, including the Inevitable podcast, spotlights key perspectives critical to our portfolio and the transition at large, reaching tens of thousands of professionals multiple times per week.
2019
Board Member
Jul 2019
Aliro, The Quantum Networking Company®, offers AliroNet® to run entanglement-based Quantum Networks for applications such as Quantum Secure Communications (QSC), secure access to clouds and data centers, networking of quantum computers, and networking of distributed quantum sensors. AliroNet is also used to implement comprehensive Advanced Secure Networks which include Post-Quantum Cryptography (PQC). Aliro provides quantum network simulation as a professional service or as an on-premises offer. AliroNet® users include utility companies, telecommunications providers, public sector organizations, enterprises, and researchers who are simulating, designing, piloting, orchestrating, and building the worlds first quantum networks. Visit us at AliroTech.com.
2018
Investor & Co-Founder
Mar 2018
Minim, Inc., (NASDAQ: MINM) was born in 1977 as a networking company and now delivers intelligent software to protect and improve the WiFi connections we depend on to work, learn, and live. Minim’s cloud platform powers intuitive apps and a variety of routers, helping customers take control of their connected experience and privacy. Headquartered in Manchester, N.H., Minim holds the exclusive global license to design and manufacture consumer networking products under the Motorola brand. To learn more, visit https://www.minim.com. MOTOROLA and the Stylized M Logo are trademarks or registered trademarks of Motorola Trademark Holdings, LLC and are used under license.
2015
Draper
Board Member
2015
2012
Board Member
Dec 2012
For IT teams that manage multi-SaaS environments, BetterCloud automates onboarding, offboarding & mid-lifecycle changes, SaaS application access & entitlements, and security policies. Unlike Identity & Access Management solutions that require manual intervention and custom scripting, or IT Service Desk solutions that generate tickets to be manually worked, BetterCloud’s granular, powerful automation and unlimited customizable workflows complement your IAM and help desk automation to improve IT efficiency by reducing up to 78% of SaaS management work. If your IT team is scripting or manually managing access to applications, files, folders, and groups for anyone joining, leaving, or moving inside your organization, you’re throwing talent and resources you can't spare at problems BetterCloud can automate. Our customers tell us they get huge value from BetterCloud because we enable them to: 1. Maximize operational efficiency 2. Accelerate employee productivity 3. Scale IT impact
Show all 30 entries ↓
Investment activity
1997–2019 · 25 investments
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