Sigma Software Executive and Leadership Team

May, 2026

Leadership Overview

Sigma Software has 5 executives leading key functions including strategy, information technology, technology, and finance.

Driven by innovation, Sigma Software provides comprehensive software development services across diverse sectors, fostering technological advancement and client success from its base in Kharkiv, Ukraine.

Leadership Roles at Sigma Software

  • Chief Executive Officer - John Kuzma
  • Deputy Chief Financial Officer - Kate Gribanova
  • Deputy Chief Financial Officer - Kate Kolomiets
  • Chief Information Officer - Julia Nilga
  • Field Chief Technology Officer - Ian Pomerantsev
  • John Kuzma - Chief Executive Officer

    John Kuzma, the Chief Executive Officer at Sigma Software, directs the company's overall strategic vision and operational execution. Kuzma guides the organization's expansion into new markets and service areas, ensuring alignment with industry trends and client demands. This leadership role involves fostering a culture of innovation and excellence across all departments. By overseeing high-level decision-making, John Kuzma ensures Sigma Software maintains its competitive edge in the software development landscape. The Chief Executive Officer's purview extends to key partnerships and stakeholder relations, solidifying the company's reputation for delivering high-quality solutions. John Kuzma's strategic direction is fundamental to the company's sustained growth and market impact.

    Kate Gribanova - Deputy Chief Financial Officer

    Kate Gribanova, the Deputy Chief Financial Officer at Sigma Software, supports the financial strategy and operational management of the company's fiscal activities. Gribanova assists in budgeting, forecasting, and financial reporting, ensuring fiscal discipline and compliance with regulatory standards. This position involves close collaboration with various departments to manage financial resources effectively. Overseeing specific financial operations, Kate Gribanova contributes to the optimization of financial performance and risk mitigation. The Deputy Chief Financial Officer's role is integral to maintaining the financial health and stability of Sigma Software. By providing critical financial insights, Kate Gribanova supports informed decision-making across the organization.

    Kate Kolomiets - Deputy Chief Financial Officer

    Kate Kolomiets, the Deputy Chief Financial Officer at Sigma Software, contributes to the oversight of financial planning and analysis, focusing on resource allocation and cost management. Kolomiets supports the development and implementation of financial policies and procedures that enhance operational efficiency and profitability. This role involves detailed analysis of financial data to identify trends and opportunities for improvement. Overseeing specific financial control mechanisms, Kate Kolomiets ensures the accuracy and integrity of financial records. The Deputy Chief Financial Officer's expertise is vital for supporting the company's growth initiatives and ensuring sustainable financial practices. By managing key financial processes, Kate Kolomiets strengthens Sigma Software's fiscal resilience.

    Julia Nilga - Chief Information Officer

    Julia Nilga, the Chief Information Officer at Sigma Software, architects and manages the company's internal technology infrastructure and information systems. Nilga ensures the security, integrity, and efficiency of all data management processes, supporting seamless operations for development teams and client projects. This critical function involves implementing cutting-edge IT solutions that enhance productivity and safeguard sensitive information. Overseeing the IT department, Julia Nilga drives the adoption of new technologies and best practices. The Chief Information Officer's responsibilities include disaster recovery planning and business continuity, ensuring uninterrupted service delivery. By optimizing technological resources, Julia Nilga directly supports Sigma Software's commitment to reliable and advanced software development.
    Julia Nilga

    Ian Pomerantsev - Field Chief Technology Officer

    Ian Pomerantsev, the Field Chief Technology Officer at Sigma Software, spearheads the company's technological innovation and client-facing technical strategy. Pomerantsev identifies emerging technologies and translates them into actionable solutions for diverse client needs across various sectors. This role involves deep engagement with clients to understand their technical challenges and opportunities. Overseeing the technical roadmap, Ian Pomerantsev ensures Sigma Software remains at the forefront of software engineering advancements. The Field Chief Technology Officer's expertise is crucial in shaping the company's service offerings and technical direction. By bridging the gap between technology and business objectives, Ian Pomerantsev drives the successful implementation of complex software projects.

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    Frequently Asked Questions Regarding Sigma Software Top Executives and Leadership Team

    Who leads Sigma Software?
    Sigma Software is led by John Kuzma (Chief Executive Officer), along with executives such as Kate Gribanova (Deputy Chief Financial Officer) and Kate Kolomiets (Deputy Chief Financial Officer).
    Who is part of Sigma Software’s executive team?
    The executive team of Sigma Software includes leaders such as John Kuzma (Chief Executive Officer), Kate Gribanova (Deputy Chief Financial Officer), Kate Kolomiets (Deputy Chief Financial Officer) and other senior executives.
    How many executives does Sigma Software have?
    Sigma Software has 5 executives leading key business areas.
    What roles are included in Sigma Software’s leadership team?
    The leadership team of Sigma Software includes roles such as Chief Executive Officer, Deputy Chief Financial Officer, Deputy Chief Financial Officer, Chief Information Officer, Field Chief Technology Officer.