ASELSAN Executive and Leadership Team

May, 2026

Leadership Overview

ASELSAN has 7 executives leading key functions including strategy, finance, and information technology.

Driven by indigenous product development, ASELSAN is a defense electronics company and a global subsidiary of the Turkish Armed Forces Foundation, focused on exporting its advanced technological solutions.

Leadership Roles at ASELSAN

  • Chief Executive Officer - Musa Reyis
  • Group Chief Executive Officer - Sim Song
  • Chief Financial Officer - Mehlika Sayin
  • Vice President, Chief Financial Officer - Nuh Yılmaz
  • Chief Financial Officer & Vice President - Nurettin Tuysuz
  • Chief Information Officer - Fatih Çoban
  • Chief of Staff and ÖZel Kalem Müdürü - Nanç Koyuncu
  • Musa Reyis - Chief Executive Officer

    Musa Reyis, the Chief Executive Officer at ASELSAN, directs the company's overall strategic vision and operational execution. Reyis guides ASELSAN's expansion as a defense electronics leader and indigenous product exporter. This leadership role involves fostering innovation across all departments, ensuring alignment with the Turkish Armed Forces Foundation's objectives. Reyis oversees the development and implementation of long-term growth strategies, focusing on enhancing the company's global market presence. By driving technological advancements, Musa Reyis ensures ASELSAN maintains its competitive edge in the defense sector. The Chief Executive Officer's purview includes managing key stakeholder relationships and championing the company's commitment to indigenous solutions. This executive's focus is on maximizing operational efficiency and profitability while upholding the company's mission.

    Sim Song - Group Chief Executive Officer

    Sim Song, the Group Chief Executive Officer at ASELSAN, spearheads the strategic direction and comprehensive management of the organization. Song directs ASELSAN's operations as a prominent defense electronics manufacturer and exporter of indigenous products. This executive's responsibilities encompass driving innovation, ensuring operational excellence, and expanding the company's international footprint. Sim Song oversees the integration of advanced technologies and manages critical partnerships to bolster ASELSAN's market position. The Group Chief Executive Officer's mandate includes fostering a culture of continuous improvement and technological leadership. By orchestrating global initiatives, Sim Song ensures the company's sustained growth and adherence to its foundational mission. This leadership position is pivotal in navigating complex market dynamics and securing future opportunities.

    Mehlika Sayin - Chief Financial Officer

    Mehlika Sayin, the Chief Financial Officer at ASELSAN, manages the company's financial health and strategic fiscal planning. Sayin oversees all financial operations, including budgeting, forecasting, and financial reporting, ensuring compliance with regulatory standards. This role is critical in supporting ASELSAN's growth as a defense electronics exporter by optimizing resource allocation and managing investment strategies. Mehlika Sayin directs the financial teams to enhance profitability and maintain fiscal discipline across the organization. The Chief Financial Officer's responsibilities extend to risk management and the development of financial models that support long-term business objectives. By providing critical financial insights, Sayin enables informed decision-making for strategic initiatives. Mehlika Sayin's leadership ensures the financial stability required for ASELSAN's continued success.
    Mehlika Sayin

    Nuh Yılmaz - Vice President, Chief Financial Officer

    Nuh Yılmaz, the Vice President, Chief Financial Officer at ASELSAN, contributes significantly to the company's financial management and strategic planning. Yılmaz supports the oversight of financial operations, including budgeting, financial analysis, and reporting, ensuring fiscal integrity. This role is integral to ASELSAN's mission as a defense electronics exporter, focusing on financial optimization and resource management. Nuh Yılmaz collaborates with other finance leaders to implement effective financial controls and drive cost efficiencies. The Vice President, Chief Financial Officer's responsibilities include supporting investment decisions and managing financial risks. By providing key financial guidance, Yılmaz aids in the execution of strategic growth initiatives. Nuh Yılmaz's involvement reinforces the company's financial resilience and operational effectiveness.

    Nurettin Tuysuz - Chief Financial Officer & Vice President

    Nurettin Tuysuz, the Chief Financial Officer & Vice President at ASELSAN, leads the financial strategy and operational execution for the company. Tuysuz oversees all aspects of financial management, including accounting, treasury, and financial planning, ensuring robust fiscal governance. This executive's purview is critical for ASELSAN's position as a defense electronics exporter, focusing on financial performance optimization and capital allocation. Nurettin Tuysuz directs the finance department in developing strategies to enhance profitability and manage financial risks effectively. The Chief Financial Officer & Vice President's responsibilities include driving financial innovation and ensuring compliance with international financial standards. By providing strategic financial leadership, Tuysuz supports the company's long-term objectives and operational expansion. Nurettin Tuysuz's expertise is vital for maintaining ASELSAN's financial strength and market competitiveness.
    Nurettin Tuysuz

    Fatih Çoban - Chief Information Officer

    Fatih Çoban, the Chief Information Officer at ASELSAN, directs the company's information technology strategy and infrastructure. Çoban oversees the implementation and management of advanced IT systems that support ASELSAN's operations as a defense electronics manufacturer and exporter. This executive's focus is on enhancing cybersecurity, optimizing data management, and driving digital transformation initiatives across the organization. Fatih Çoban ensures that technology solutions align with business objectives, facilitating innovation and operational efficiency. The Chief Information Officer's role involves managing IT budgets, leading technology teams, and evaluating emerging technologies for potential adoption. By ensuring robust IT infrastructure, Çoban supports ASELSAN's global reach and its commitment to indigenous product development. Fatih Çoban's leadership is crucial for maintaining a secure and technologically advanced operational environment.

    Nanç Koyuncu - Chief of Staff and ÖZel Kalem Müdürü

    Nanç Koyuncu, the Chief of Staff and ÖZel Kalem Müdürü at ASELSAN, provides strategic support and operational coordination for executive leadership. Koyuncu manages key initiatives, facilitates communication across departments, and ensures the efficient execution of strategic priorities. This role is essential in aligning ASELSAN's operations as a defense electronics exporter with its overarching mission and objectives. Nanç Koyuncu oversees special projects and administrative functions, enhancing organizational effectiveness. The Chief of Staff and ÖZel Kalem Müdürü's responsibilities include streamlining internal processes and supporting executive decision-making. By acting as a central point of coordination, Koyuncu drives operational synergy and facilitates the implementation of critical business strategies. Nanç Koyuncu's contribution is vital for maintaining organizational agility and achieving strategic goals.

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    Frequently Asked Questions Regarding ASELSAN Top Executives and Leadership Team

    Who leads ASELSAN?
    ASELSAN is led by Musa Reyis (Chief Executive Officer), along with executives such as Sim Song (Group Chief Executive Officer) and Mehlika Sayin (Chief Financial Officer).
    Who is part of ASELSAN’s executive team?
    The executive team of ASELSAN includes leaders such as Musa Reyis (Chief Executive Officer), Sim Song (Group Chief Executive Officer), Mehlika Sayin (Chief Financial Officer) and other senior executives.
    How many executives does ASELSAN have?
    ASELSAN has 7 executives leading key business areas.
    What roles are included in ASELSAN’s leadership team?
    The leadership team of ASELSAN includes roles such as Chief Executive Officer, Group Chief Executive Officer, Chief Financial Officer, Vice President, Chief Financial Officer, Chief Financial Officer & Vice President.