One Call Executive and Leadership Team

August, 2026

Leadership Overview

One Call has 4 executives leading key functions including strategy, information technology, financial management, and operational oversight.

Focused on transforming ancillary services care coordination, One Call delivers specialized workers' compensation solutions that improve patient outcomes and streamline complex medical recovery processes across the United States.

Leadership Roles at One Call

  • Chief Executive Officer - Nicholas Mendez
  • Chief Financial Officer - Michele Haas
  • President - Robert Cook
  • Chief Information Officer - Matthew Lynch
  • Nicholas Mendez - Chief Executive Officer

    Nicholas Mendez, the Chief Executive Officer at One Call, directs the overarching corporate strategy for this ancillary services care coordination leader. By aligning organizational goals with the evolving needs of the workers' compensation industry, the Chief Executive Officer ensures that One Call maintains a competitive edge in medical recovery services. Nicholas Mendez oversees the integration of complex care networks, driving efficiency across national operations to support injured workers. This leadership role involves constant collaboration with the Board to refine long-term growth initiatives and market positioning. Through rigorous focus on operational excellence, the Chief Executive Officer optimizes service delivery models that define the company's reputation. By prioritizing innovation in care coordination, Mendez secures the financial health and market relevance of the organization. This executive leadership remains dedicated to advancing the standard of care within the workers' compensation sector through strategic foresight and disciplined management of all corporate resources.
    Nicholas Mendez

    Michele Haas - Chief Financial Officer

    Michele Haas, the Chief Financial Officer at One Call, manages the fiscal health and capital allocation strategies for this leader in workers' compensation ancillary services. By overseeing financial planning and analysis, the Chief Financial Officer ensures that resources support the company's mission of efficient care coordination. Michele Haas directs budgeting processes, monitors revenue streams, and evaluates investment opportunities to sustain long-term profitability. This leadership role involves maintaining rigorous compliance standards and providing transparent financial reporting to stakeholders. By optimizing cost structures, the Chief Financial Officer enables the organization to invest in innovative medical recovery technologies. Haas collaborates with other executives to align financial goals with operational expansion, ensuring that One Call remains a stable partner for insurance carriers and medical providers. Through disciplined fiscal oversight, the Chief Financial Officer mitigates risk and strengthens the company's balance sheet. This strategic financial management remains vital to the continued growth and operational success of the entire enterprise.

    Robert Cook - President

    Robert Cook, the President at One Call, executes the daily operational strategy for this prominent ancillary services care coordination firm. By supervising core business units, the President ensures that service delivery meets the high standards required within the workers' compensation industry. Robert Cook drives cross-functional collaboration to streamline the coordination of medical services, from physical therapy to diagnostic testing. This leadership role involves managing relationships with national provider networks to guarantee consistent quality and timely access for injured workers. By refining operational workflows, the President enhances the overall efficiency of the care coordination model. Cook monitors performance metrics to identify areas for improvement, ensuring that the company consistently delivers value to clients. Through active engagement with department heads, the President maintains alignment with the corporate mission. This operational focus remains essential for scaling services across the United States, allowing the organization to effectively manage complex medical recovery cases while maintaining a strong market presence.

    Matthew Lynch - Chief Information Officer

    Matthew Lynch, the Chief Information Officer at One Call, architects the digital infrastructure necessary for seamless ancillary services care coordination. By modernizing data systems, the Chief Information Officer enables secure, real-time communication between medical providers and insurance carriers. Matthew Lynch drives the implementation of advanced software solutions that automate complex workflows, significantly reducing administrative burdens within the workers' compensation industry. This role involves managing cybersecurity protocols to protect sensitive patient information while scaling cloud-based platforms to meet growing demand. By leveraging data analytics, the Chief Information Officer identifies trends that improve recovery outcomes for injured workers. Lynch ensures that all technological investments align with the broader mission of enhancing care accessibility. Through the deployment of robust digital tools, the Chief Information Officer supports the operational agility required to maintain market leadership. This technical vision remains central to the company's ability to provide efficient, high-quality medical coordination services across diverse regional markets.

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    Frequently Asked Questions Regarding One Call Top Executives and Leadership Team

    Who leads One Call?
    One Call is led by Nicholas Mendez (Chief Executive Officer), along with executives such as Michele Haas (Chief Financial Officer) and Robert Cook (President).
    Who is part of One Call’s executive team?
    The executive team of One Call includes leaders such as Nicholas Mendez (Chief Executive Officer), Michele Haas (Chief Financial Officer), Robert Cook (President) and other senior executives.
    How many executives does One Call have?
    One Call has 4 executives leading key business areas.
    What roles are included in One Call’s leadership team?
    The leadership team of One Call includes roles such as Chief Executive Officer, Chief Financial Officer, President, Chief Information Officer.