Investment Management team
Proof of our delivery during a global pandemic
The investment team’s proven record includes successful delivery through Covid restrictions, during which it developed its largest plant to date – Uttar Pradesh I in Northern India. Our investment model utilises local on-the-ground expertise combined with the resources and backing of a global organisation.


Investment team
As established leaders in the field of Asian sustainable energy infrastructure, our strong and stable investment team has a demonstrable track-record of more than 10 years in achieving its triple return of positive financial, environmental and social outcomes.
Key team members
As dedicated impact asset managers we are entirely focused on delivering our triple returns for clients. Our infrastructure investment committee is supported by a broader team of experienced investment and energy infrastructure professionals.
- 10 dedicated infrastructure specialists
- Comprising of investment and energy infrastructure professionals
- Average of 25 years of experience
Our team also draws on additional resources and subject matter experts through our:
- ESG Monitoring and Stewardship Committee
- Market Risk Committee
Michael Sieg
Chief Executive Officer
- Established ThomasLloyd in 2003
- Led the group’s first investment in a cleantech investment banking firm in 2005
- Stewarded the firm to become a dedicated global impact asset manager
- Involved in all phases of ThomasLloyd’s development
- Chair of the infrastructure investment committee
Nadir Maruf
Chief Investment Officer
- Leads the investment strategy execution for ThomasLloyd Group
- Brings over 25 years of alternative investments experience to drive impactful expansion
- Formerly Head of Private Markets at Tesco Pension Investment, overseeing unlisted strategies
- Involved in crafting net zero pathway and climate-related financial disclosures strategy
- Previously CIO of Alternatives & Head of Direct Infrastructure at Eastspring Investments
- Held significant roles at Deutsche Asset Management and was a founding partner of Daestrum Capital
Ian Ruddock
Chief Operation Officer
- Currently serves as Chief Operating Officer in Asset Management for the ThomasLloyd Group
- Formerly held positions of CFO and CRO at Capital & Asset Management Group
- Possesses 30 years of experience in project and infrastructure finance
- Advised on 45+ international transactions, totaling over GBP 15 billion in enterprise value
Duncan Black
Head of Portfolio & Asset Management
- Oversees the Group’s portfolio performance across development, construction, and operational stages
- Drives value creation and long-term asset management strategy for the Group
- Previously MD for Asia Infrastructure Investors, advising on renewable energy development
- Key role in Monsoon Wind Power Project, Southeast Asia’s largest wind farm
- Held diverse roles including Co-Head of Infrastructure at Eastspring, founding partner at Daestrum Capital, and leadership positions at Deutsche Asset Management and EnergyAustralia
Andrew Charlesworth
Lead, Asset Management Transactions
- Previously served as CEO and CIO at Capital & Asset Management Group
- Brings 27 years of expertise in infrastructure investment delivery, financing, and management
- Offers advisory experience in project finance across 13 different countries
“With more than a decade’s experience investing in sustainable energy infrastructure markets in Asia, we are well-placed to convert this global challenge into a highly compelling opportunity, delivering our innovative triple return in the process.”