Sigma Executive and Leadership Team

July, 2026

Leadership Overview

Sigma has 4 executives leading key functions including revenue generation, technology strategy, operations, and legal counsel.

Driven by innovation, Sigma is dedicated to empowering organizations with a cloud-native AI applications and agentic analytics platform, accelerating decision-making and operational efficiency through centralized governance and secure data interaction.

Leadership Roles at Sigma

  • Chief Revenue Officer - Marcello Gallo
  • Field Chief Technology Officer - Jonathan Avrach
  • Chief Operations Officer - Amitabh Pathy
  • General Counsel - Ali Harmer
  • Marcello Gallo - Chief Revenue Officer

    Marcello Gallo, the Chief Revenue Officer at Sigma, directs all revenue-generating activities, focusing on expanding market penetration and driving sustainable growth for the cloud-native AI applications and agentic analytics platform. Gallo oversees global sales strategies, partnership development, and customer success initiatives, ensuring alignment with Sigma's mission to accelerate decision-making and operational efficiency. This leadership role involves cultivating strong client relationships and identifying new market opportunities within modern cloud data warehouses. By optimizing the sales funnel and enhancing customer lifetime value, Marcello Gallo directly impacts the company's financial trajectory. Ultimately, Gallo secures long-term revenue streams and reinforces Sigma's position as a leader in data-driven automation and analytics.
    Marcello Gallo

    Jonathan Avrach - Field Chief Technology Officer

    Jonathan Avrach, the Field Chief Technology Officer at Sigma, architects and communicates the technical vision for the company's cloud-native AI applications and agentic analytics platform to external stakeholders and internal teams. Avrach focuses on demonstrating the platform's capabilities in enabling business and technical users to explore, analyze, build applications, and automate workflows directly with live data. This role involves translating complex technical features into tangible business benefits, showcasing how Sigma maintains centralized governance and control without data movement. By engaging with clients and partners, Jonathan Avrach ensures the platform's value proposition resonates within the market, driving adoption and fostering innovation. The Field Chief Technology Officer's expertise bridges the gap between cutting-edge technology and practical application, supporting Sigma's goal of accelerating decision-making and operational efficiency.

    Amitabh Pathy - Chief Operations Officer

    Amitabh Pathy, the Chief Operations Officer at Sigma, directs the internal operational framework that supports the company's cloud-native AI applications and agentic analytics platform. Pathy ensures the seamless execution of business processes, optimizing efficiency and scalability across all departments. This leadership position involves managing the day-to-day functions that enable Sigma to deliver its unified workspace, combining spreadsheet-like interfaces with SQL, Python, and AI capabilities. By streamlining workflows and enhancing resource allocation, Amitabh Pathy directly contributes to the platform's ability to allow teams to collaborate on data-driven work at scale. The Chief Operations Officer's focus on operational excellence is critical for maintaining centralized governance, data security, and compliance, thereby supporting Sigma's mission to accelerate decision-making and operational efficiency.

    Ali Harmer - General Counsel

    Ali Harmer, the General Counsel at Sigma, oversees all legal and compliance matters pertaining to the company's cloud-native AI applications and agentic analytics platform. Harmer ensures that Sigma's operations, including data handling, user agreements, and intellectual property, adhere to all relevant regulations and industry standards. This critical role involves providing strategic legal guidance to support the platform's ability to maintain centralized governance and control while enabling business and technical users to work directly with live data. By navigating complex legal landscapes, Ali Harmer safeguards the organization's interests and reinforces trust with clients and partners. The General Counsel's expertise is fundamental to Sigma's commitment to data security, consistency, and compliance, directly supporting the company's objective of accelerating decision-making and operational efficiency.

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    Frequently Asked Questions Regarding Sigma Top Executives and Leadership Team

    Who leads Sigma?
    Sigma is led by Marcello Gallo (Chief Revenue Officer), along with executives such as Jonathan Avrach (Field Chief Technology Officer) and Amitabh Pathy (Chief Operations Officer).
    Who is part of Sigma’s executive team?
    The executive team of Sigma includes leaders such as Marcello Gallo (Chief Revenue Officer), Jonathan Avrach (Field Chief Technology Officer), Amitabh Pathy (Chief Operations Officer) and other senior executives.
    How many executives does Sigma have?
    Sigma has 4 executives leading key business areas.
    What roles are included in Sigma’s leadership team?
    The leadership team of Sigma includes roles such as Chief Revenue Officer, Field Chief Technology Officer, Chief Operations Officer, General Counsel.