Together we can pave the way

Our Mission

London GreenCity is an accelerator of post-startup clean technology entrepreneurs focused on a broad range of climate technologies addressing the causes and impact of climate change.

Data on accelerators indicate participants have a higher success rate in bringing their technology to market successfully than those that have not.

London GreenCity will offer a dynamic, physical, collaborative environment for Seed- to Series B-stage ventures, providing the facilities and tools important for the development of their product offerings.


John Kermath

Managing Partner

Mr. Kermath has spent over 25 years in fund management, investment banking, and venture advisory, working closely in the latter capacity with emerging technology companies in a variety of sectors. He serves on the advisory boards of Ecosphere Ventures, a pre-seed venture fund focused on sustainable and clean energy technologies, and a London-based investment banking firm. He is also a director of Epochal Technologies, a data science firm, and advises early-stage companies in the Fusion Industry Association and Greentown Labs, an accelerator in Cambridge, MA.

He was previously President, Chief Financial and Board member of MetOx Technologies, a venture-stage firm establishing production of high-temperature superconductors for applications in commercial fusion and energy transmission. Prior to that, he was recruited to restructure a multi-billion hedge fund after which he became President and subsequently CEO of the fund. Post-restructure he managed over $1 billion in residual venture and private equity investments in the portfolio. He is a past President and Board member of the Houston Venture Capital Association (now Houston Private Equity Association) and has served on multiple venture and non-for- profit boards.

Mr. Kermath began his career at Citibank and Deutsche Bank and previously served in the U.S. Army. He is a graduate of Princeton University with a degree in Economics.

Bradway Widing


Bradway has spent 9 years as a member of Greentown Labs in Boston mentoring “members” growth aspirations and three decades serving major clean energy relationships by de-risking balance sheet liabilities directing “performance” and “efficacy” reinsurance solutions to defend investor’s debt through his 25 year alliance with Lloyd’s of London and the global clean energy insurance community. His passion in life is family, friends, squash, golf, dogs and painting.

Laith Anezi


Laith has over 15 years of experience in venture capital and supporting start-ups, including leadership at a FTSE 100 firm. He has a broad network of government, corporate and family office relationships across the U.K., Europe,  and MENA.

Board of Advisors

Melanie Windridge

Fusion Energy Insights

Dr. Melanie Windridge is a specialist in fusion energy who helps people see the value, opportunities and excitement of fusion.

Melanie is the founder and CEO of Fusion Energy Insights, the primary independent information provider for the fusion industry, which keeps people up to date with developments in the growing sector. She has a PhD in plasma physics (fusion energy) from Imperial College London and broad experience of fusion from academia to private fusion developers to wider industry. She sits on the Advisory Boards of the UK Fusion Cluster and US non-profit Energy for the Common Good (as well as this one!). Melanie was previously UK Director of the Fusion Industry Association for 3 years from it’s formation. In 2022 she was elected a Fellow of the Clean Growth Leadership Network. Melanie is the author of Aurora: In Search of the Northern Lights and Star Chambers: the race for fusion power, as well as writing for Forbes online.

Melanie is a past Vice President of the Alpine Club (2019/2020) volunteers with the Mount Everest Foundation for events and exhibitions. She loves the mountains (Melanie has climbed Mount Everest) and believes science and exploration go hand in hand.


Mark Barron

Taylor Wessing

Mark is the founding partner of the Taylor Wessing Silicon Valley representative office.

He is also the head of Taylor Wessing’s market-leading inward investment practice, which advises tech, clean tech and energy and life sciences companies on international expansion and M&A.

Mark sits on Taylor Wessing’s executive board as head of clients and innovation.

Mark has been with Taylor Wessing since 1999, and now leads a team which acts for many of North America’s best-known technology and life sciences companies, including approximately a quarter of US-based unicorns. He is a specialist in cross-border and domestic M&A as well as tax-driven restructurings.


Joubin Hatamzadeh

Greentown Labs

Joubin is the COO at Greentown Labs, North America’s largest Climatetech Incubator, where he oversees internal operations, community, and sales departments.

During his tenure at Greentown, Joubin has led his team through growth in campus footprint, quality of service, and revenue. The operational improvements under his leadership resulted in increased member satisfaction and retention.

Beyond climatetech, Joubin’s career spans various industries, including life sciences, consulting services, and manufacturing. His functional experiences encompass operations, general management, business development, people management, and customer service.

Joubin is a culinary enthusiast, music aficionado, and furniture craftsman, reflecting his dynamic approach to both professional and personal pursuits.


Rupert Cutler


Rupert is an experienced Risk Consultant and Insurance Broker.

Rupert has been working with clients on international business for over 30 years, particularly across the African continent. He is a regular speaker on the conference circuit, advising on the practicalities of risk identification and management.

Rupert has a number of risk transfer specialisms including agricultural and energy commodities, Non-Governmental Organizations, trade and project finance, asset finance, construction and contractors and helping new technology to secure financing and insurance around the world.

Rupert is an FCA approved Authorized Representative of Bellwood Prestbury an independent Lloyds Broker specializing in high-risk insurance. He holds an LLB Hons from University College Cardiff, is an Associate of the Chartered Insurance Institute and is a Chartered Insurance Broker. Rupert is also deployed as an expert witness, helping clients to challenge denied international insurance claims in court.


Sidney McLaurin

Fleet Robotics

Sidney McLaurin is the CEO of Fleet Robotics. Sidney and his co-founders started Fleet as a simple, automated mobile robot platform to help industrial companies proactively maintain large industrial structures. Starting with the maritime industry, their collaborative robots live permanently on commercial ships and help simplify inspection, maintenance, and cargo operations. The robots are best known for their novel walking ability on vertical surfaces in harsh conditions — even underwater while the ship is in motion.

Sidney incubated the concept for Fleet while he was a Partner at Material Impact, a Boston-based venture fund. Prior to the fund, he worked at Lime where he joined as its first GM in 2017 and helped scale the company from a single market to the global presence it is today.

McLaurin credits his interest in climate to growing up around the outdoors in Mississippi. He is a mentor and advisor for a variety of folks within the climate startup ecosystem, including the formation of a new start-up incubator in London.

Sidney is an engineer by training — he started his career at Siemens in Industrial Automation and holds a Mechanical Engineering degree from the University of Florida. He transitioned into climate entrepreneurship with a MBA and an Environmental Management degree from Duke University.


Rebecca Leonardi

Wx Risk Global LLC

Rebecca Leonardi is a Partner at Wx Risk Global.

Wx Risk Global is a weather risk management and derivatives team dedicated to assisting clients in financially mitigating the effects of adverse weather. As Principle of Wx Risk Global, Rebecca is responsible for managing the business relationship between the corporate client base, the OTC derivative counterparties, and their various finance-related business partners. She plays a key role in the acquisition of new clients and large corporate relations. She was also essential in the formation of a successful weather derivative fund that she and her partners operated for eight years.

Rebecca has years of experience in entrepreneurial partnerships over multiple businesses as well as various board positions within non-profit foundations. Her main focus is waste to green energy. She is involved in several projects that work to achieve both humanitarian and energy-related climate goals.


Bart LeFevre

INpower Global Insurance Services

Bart is a over-30-year veteran of the Energy industry focused on risk consultation/risk brokerage insurance services.

His oil and gas risk experience spans a unique and broad spectrum of energy insurance, including underwriting, wholesale/MGA and company leadership in the retail brokerage market in Texas and California.

Bart has a B.B.A. in Finance with an emphasis on Insurance from Stephen F. Austin University in Nacogdoches, TX. He is the proud father of two grown sons, Taylor and Joshua.