Open Society Institute Executive and Leadership Team

August, 2026

Leadership Overview

Open Society Institute has 10 executives leading key functions including operations, information technology, and executive administration.

Committed to advancing global investment advisory standards, Open Society Institute drives excellence through rigorous financial oversight and strategic management of international fund portfolios to ensure long-term market stability.

Leadership Roles at Open Society Institute

  • Chief Operating Officer - Leela Ramdhani
  • Operations Officer & Chief Operating Officer, Office of - Fatima Munoz
  • Interim Chief Operating Officer - Maija Arbolino
  • Administrative Officer, President's Office - Rita Lo
  • Founder & President - Dmitry Kabak
  • President, FNJ - Henry Lesquen
  • Chief Information Officer - Yalan Teng
  • Deputy Chief Information Officer - Sofie Gekhel
  • Global Chief Information Officer - Marilyn Law
  • Chief Operations Officer - Caroline Anstey
  • Leela Ramdhani - Chief Operating Officer

    Leela Ramdhani, the Chief Operating Officer at Open Society Institute, directs internal business processes to optimize advisory services for the Quantum Group of Funds. Ramdhani manages cross-departmental workflows, ensuring that operational efficiency remains high across all international investment activities. By aligning administrative functions with the broader financial goals of the firm, the Chief Operating Officer maintains rigorous standards for data integrity and reporting. Leela Ramdhani also coordinates with the investment teams to streamline resource allocation, which supports the firm's ability to navigate complex global markets. This leadership role involves constant monitoring of operational risks and the implementation of scalable systems that facilitate growth. Through meticulous oversight of daily business activities, the Chief Operating Officer secures the infrastructure necessary for sustained performance in the competitive finance sector, ultimately reinforcing the firm's reputation for excellence in managing diverse investment portfolios.
    Leela Ramdhani

    Fatima Munoz - Operations Officer & Chief Operating Officer, Office of

    Fatima Munoz, the Operations Officer & Chief Operating Officer, Office of at Open Society Institute, manages the administrative functions within the executive office to ensure smooth coordination of advisory services. Munoz oversees the internal logistics that support the firm's interactions with the Quantum Group of Funds, focusing on process optimization and organizational alignment. By streamlining communication channels between the executive leadership and the broader investment teams, the Operations Officer & Chief Operating Officer, Office of facilitates rapid decision-making. Fatima Munoz also monitors the execution of strategic initiatives, ensuring that all operational activities adhere to the firm's high standards for compliance and performance. This role involves managing complex schedules and resource distribution to maximize productivity across the organization. Through diligent oversight of office operations, the Operations Officer & Chief Operating Officer, Office of maintains the structural integrity of the firm, allowing the investment professionals to focus entirely on delivering superior financial results.
    Fatima Munoz

    Maija Arbolino - Interim Chief Operating Officer

    Maija Arbolino, the Interim Chief Operating Officer at Open Society Institute, provides temporary leadership to ensure the continuity of operational excellence during periods of transition. Arbolino oversees the core business functions that support the firm's advisory services, focusing on maintaining stability in daily workflows. By managing the execution of key operational tasks, the Interim Chief Operating Officer ensures that the firm continues to meet the needs of the Quantum Group of Funds without interruption. Maija Arbolino also coordinates with department heads to address immediate challenges and maintain alignment with the firm's long-term financial objectives. This role involves a high degree of adaptability, as the Interim Chief Operating Officer must quickly assess and optimize existing processes to sustain performance. Through focused management of resources and personnel, the Interim Chief Operating Officer preserves the firm's operational momentum, ensuring that all investment advisory activities remain efficient, compliant, and effective throughout the transition period.

    Rita Lo - Administrative Officer, President's Office

    Rita Lo, the Administrative Officer, President's Office at Open Society Institute, manages the high-level administrative functions that support the firm's leadership. Lo oversees the flow of information and communication within the President's office, ensuring that strategic priorities are clearly articulated and executed. By coordinating the activities of the executive team, the Administrative Officer, President's Office facilitates the smooth operation of the firm's advisory services. Rita Lo also manages key stakeholder relationships, ensuring that the firm's mission remains at the forefront of all executive interactions. This role involves organizing complex workflows and ensuring that the President's office remains focused on the firm's core investment objectives. Through meticulous attention to detail and proactive management of administrative tasks, the Administrative Officer, President's Office supports the overall efficiency of the firm. Ultimately, Lo ensures that the leadership team has the necessary support to navigate the complexities of the international investment landscape effectively.
    Rita Lo

    Dmitry Kabak - Founder & President

    Dmitry Kabak, the Founder & President at Open Society Institute, establishes the strategic vision and core mission that guide the firm's investment advisory services. Kabak oversees the firm's long-term growth strategy, ensuring that all activities remain aligned with the goal of providing expert guidance to the Quantum Group of Funds. By setting the tone for the firm's culture and professional standards, the Founder & President drives the commitment to excellence that defines the organization. Dmitry Kabak also engages with key market participants to identify new opportunities for international investment and expansion. This leadership role involves making critical decisions that shape the firm's market position and influence. Through the development of a robust strategic framework, the Founder & President ensures that the firm remains a leader in the finance sector. Ultimately, Kabak provides the direction and inspiration necessary for the firm to navigate complex global markets and deliver consistent value to its clients.

    Henry Lesquen - President, FNJ

    Henry Lesquen, the President, FNJ at Open Society Institute, directs the specific initiatives and strategic focus of the FNJ division within the broader firm. Lesquen oversees the operational and financial performance of this unit, ensuring that its activities contribute to the overall success of the firm's advisory services. By aligning the goals of FNJ with the firm's mission, the President, FNJ ensures that the division remains a vital component of the organization's international investment strategy. Henry Lesquen also manages the team responsible for executing specialized investment projects, providing the guidance necessary to achieve superior results. This role involves constant monitoring of market trends and the adjustment of strategies to maintain a competitive advantage. Through the effective leadership of the FNJ division, the President, FNJ drives growth and innovation, ensuring that the firm continues to provide high-quality advisory services that meet the evolving needs of the Quantum Group of Funds.

    Yalan Teng - Chief Information Officer

    Yalan Teng, the Chief Information Officer at Open Society Institute, architects the digital infrastructure required to support sophisticated international investment advisory services. Teng oversees the security and reliability of data systems, ensuring that the firm maintains a competitive edge in financial analysis and reporting. By integrating advanced technology solutions, the Chief Information Officer enables seamless communication between global investment teams and the central office. Yalan Teng also manages the cybersecurity framework, protecting sensitive financial information from emerging digital threats. This role requires constant collaboration with other executive leaders to align technological capabilities with the firm's long-term strategic objectives. Through the deployment of robust software platforms, the Chief Information Officer drives efficiency in data processing and decision-making. Ultimately, Teng ensures that the technological foundation remains resilient, scalable, and fully capable of supporting the complex requirements of the Quantum Group of Funds in a rapidly evolving global market.

    Sofie Gekhel - Deputy Chief Information Officer

    Sofie Gekhel, the Deputy Chief Information Officer at Open Society Institute, supports the development and maintenance of the firm's critical information systems. Gekhel focuses on the tactical implementation of data management tools that assist the investment advisory teams in analyzing international market trends. By overseeing the daily performance of IT infrastructure, the Deputy Chief Information Officer ensures that all digital assets remain accessible and secure for the firm's global operations. Sofie Gekhel also collaborates with the broader technology department to troubleshoot system issues and improve the speed of financial data delivery. This role involves managing technical projects that enhance the firm's analytical capabilities, directly impacting the quality of advice provided to the Quantum Group of Funds. Through consistent monitoring and optimization of software environments, the Deputy Chief Information Officer maintains the reliability of the firm's digital ecosystem, which is essential for supporting high-stakes investment decisions in a volatile global landscape.

    Marilyn Law - Global Chief Information Officer

    Marilyn Law, the Global Chief Information Officer at Open Society Institute, directs the overarching technology strategy across all international operations. Law oversees the integration of global data networks, ensuring that the firm maintains a unified and secure platform for managing investment advisory services. By setting the vision for digital transformation, the Global Chief Information Officer enables the firm to leverage advanced analytics for better market insights. Marilyn Law also manages relationships with key technology partners, ensuring that the firm utilizes the most effective tools for financial modeling and risk assessment. This leadership role involves coordinating with regional teams to ensure that technological standards are met consistently across all jurisdictions. Through the implementation of high-level security protocols and innovative software solutions, the Global Chief Information Officer drives the firm's ability to process vast amounts of financial data, ultimately supporting the strategic goals of the Quantum Group of Funds on a global scale.
    Marilyn Law

    Caroline Anstey - Chief Operations Officer

    Caroline Anstey, the Chief Operations Officer at Open Society Institute, leads the strategic planning and execution of operational initiatives that underpin the firm's investment advisory model. Anstey oversees the development of internal policies that govern how the firm interacts with the Quantum Group of Funds, ensuring that all processes are optimized for maximum efficiency. By driving improvements in organizational structure, the Chief Operations Officer enhances the firm's capacity to handle complex international investments. Caroline Anstey also works closely with the executive team to align operational output with the firm's broader financial goals. This role involves managing large-scale projects that improve the firm's responsiveness to market changes. Through the implementation of rigorous performance metrics, the Chief Operations Officer ensures that all operational activities contribute directly to the firm's success. Ultimately, Anstey maintains the high standards of service that define the firm's reputation in the global finance industry, ensuring long-term stability and growth.

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    Frequently Asked Questions Regarding Open Society Institute Top Executives and Leadership Team

    Who leads Open Society Institute?
    Open Society Institute is led by Leela Ramdhani (Chief Operating Officer), along with executives such as Fatima Munoz (Operations Officer & Chief Operating Officer, Office of) and Maija Arbolino (Interim Chief Operating Officer).
    Who is part of Open Society Institute’s executive team?
    The executive team of Open Society Institute includes leaders such as Leela Ramdhani (Chief Operating Officer), Fatima Munoz (Operations Officer & Chief Operating Officer, Office of), Maija Arbolino (Interim Chief Operating Officer) and other senior executives.
    How many executives does Open Society Institute have?
    Open Society Institute has 10 executives leading key business areas.
    What roles are included in Open Society Institute’s leadership team?
    The leadership team of Open Society Institute includes roles such as Chief Operating Officer, Operations Officer & Chief Operating Officer, Office of, Interim Chief Operating Officer, Administrative Officer, President's Office, Founder & President.