Johnstone Supply Executive and Leadership Team

August, 2026

Leadership Overview

Johnstone Supply has 10 executives leading key functions including finance, human resources, and regional operations.

Driven by a commitment to serving professional HVACR contractors, Johnstone Supply maintains the industry's largest selection of equipment and genuine OEM parts, ensuring contractors have the best brands and technology to complete any job.

Leadership Roles at Johnstone Supply

  • Chief Executive Officer - White Plains, NY - Tina Mutz
  • Chief Financial Officer - Robert Hollasch
  • President (Savannah) - Timothy Cameron
  • President (Greenville) - Michael Duncan
  • President, The Wines Group - Benjamin Brasseur
  • President & Part Owner - Gregory Grimme
  • President, Integrator (The Heartland Group) - Justin Radke
  • President, The Grimme Group - Todd Bridwell
  • President (Arizona, Nevada & Mississippi) - Raj Hiremath
  • Chief Human Resources Officer - Stacy Cardwell
  • Tina Mutz - Chief Executive Officer - White Plains, NY

    Tina Mutz, the Chief Executive Officer - White Plains, NY at Johnstone Supply, directs overall corporate strategy and operational execution for the specified region. Mutz spearheads initiatives to enhance Johnstone Supply's position as a premier wholesale distributor for professional HVACR contractors. This leadership involves ensuring the company maintains its extensive inventory of equipment and genuine OEM parts, crucial for meeting contractor demands. By focusing on market expansion and customer satisfaction, Mutz drives the business forward, guaranteeing access to the best brands and technology. The Chief Executive Officer's strategic vision ensures seamless integration of new products and services, supporting the company's commitment to providing comprehensive solutions and reinforcing its reputation for reliability and extensive product sourcing capabilities within the HVACR sector.

    Robert Hollasch - Chief Financial Officer

    Robert Hollasch, the Chief Financial Officer at Johnstone Supply, directs all financial operations and strategic fiscal planning. Hollasch manages the company's financial health, ensuring robust capital allocation and profitability. This leadership role involves optimizing financial performance across all business units, including inventory management and supply chain cost controls, directly supporting Johnstone Supply's mission to provide wholesale distribution services to professional HVACR contractors. By meticulously analyzing market trends and financial data, Hollasch drives informed decision-making to maintain the company's competitive edge and expand its extensive selection of equipment and OEM parts. The Chief Financial Officer's oversight ensures the financial stability necessary for continuous growth and the acquisition of leading brands and technologies, reinforcing the company's position as a key supplier in the HVACR industry.

    Timothy Cameron - President (Savannah)

    Timothy Cameron, the President (Savannah) at Johnstone Supply, leads regional operations and strategic growth initiatives for the Savannah territory. Cameron oversees the distribution of a vast selection of equipment and genuine OEM parts, ensuring professional HVACR contractors have immediate access to necessary components. This role is pivotal in maintaining Johnstone Supply's commitment to providing replacements for nearly every major brand, supported by an extensive cross-reference system that simplifies sourcing hard-to-find parts. By focusing on operational excellence and customer service within the Savannah region, Cameron drives market penetration and strengthens relationships with contractors. The President's leadership ensures the continuous expansion of product offerings and the adoption of the latest technology, directly supporting the company's mission to equip contractors for success.
    Timothy Cameron

    Michael Duncan - President (Greenville)

    Michael Duncan, the President (Greenville) at Johnstone Supply, directs all business activities and strategic development within the Greenville operational area. Duncan ensures the consistent availability of Johnstone Supply's extensive inventory of equipment and genuine OEM parts, catering to the specific needs of professional HVACR contractors in the region. This leadership position is fundamental to upholding the company's reputation for having replacements for nearly every major brand and an expansive cross-reference for difficult-to-source items. By fostering strong local partnerships and optimizing supply chain logistics, Duncan drives regional growth and customer loyalty. The President's focus on expanding the selection of brands and technology available to contractors directly supports the company's overarching goal of empowering HVACR professionals with the best tools and components.
    Michael Duncan

    Benjamin Brasseur - President, The Wines Group

    Benjamin Brasseur, the President, The Wines Group at Johnstone Supply, spearheads the strategic direction and operational management for this specialized division. Brasseur focuses on enhancing the group's capabilities in distributing a comprehensive range of equipment and genuine OEM parts tailored to specific market segments. This leadership ensures that The Wines Group maintains an extensive cross-reference and a continually expanding selection to meet unique contractor needs, particularly in specialized applications. By driving innovation and operational efficiency within The Wines Group, Brasseur reinforces Johnstone Supply's commitment to providing contractors with access to the best brands and technology. The President's oversight guarantees that the division effectively supports its clientele, solidifying its role in the company's broader mission of wholesale distribution excellence.

    Gregory Grimme - President & Part Owner

    Gregory Grimme, the President & Part Owner at Johnstone Supply, drives strategic vision and operational oversight across key business functions. Grimme is instrumental in maintaining Johnstone Supply's extensive inventory of equipment and genuine OEM parts, ensuring professional HVACR contractors have access to a wide array of solutions. This dual role involves guiding the company's growth trajectory and upholding its commitment to offering replacements for nearly every major brand, supported by an industry-leading cross-reference system. By focusing on market leadership and customer-centric strategies, Grimme ensures the company's selection continually expands to include the best brands and technology. The President & Part Owner's dedication to operational excellence and strategic partnerships reinforces Johnstone Supply's position as a vital wholesale distributor in the HVACR sector.

    Justin Radke - President, Integrator (The Heartland Group)

    Justin Radke, the President, Integrator (The Heartland Group) at Johnstone Supply, directs the integration of strategic initiatives and operational frameworks for The Heartland Group. Radke ensures that the group effectively leverages Johnstone Supply's vast selection of equipment and genuine OEM parts to serve professional HVACR contractors. This role is critical in maintaining the company's extensive cross-reference capabilities and its commitment to sourcing hard-to-find parts. By focusing on seamless operational alignment and driving efficiency, Radke enhances the group's ability to provide contractors with the best brands and technology. The President, Integrator's leadership ensures that The Heartland Group consistently meets and exceeds the evolving needs of its clientele, reinforcing Johnstone Supply's mission of comprehensive wholesale distribution.

    Todd Bridwell - President, The Grimme Group

    Todd Bridwell, the President, The Grimme Group at Johnstone Supply, leads the strategic operations and market development for this division. Bridwell oversees the provision of Johnstone Supply's extensive selection of equipment and genuine OEM parts, ensuring professional HVACR contractors receive optimal support. This leadership role is key to maintaining the company's comprehensive cross-reference system and its ability to source even the most elusive parts. By driving operational excellence and fostering strong client relationships, Bridwell ensures The Grimme Group effectively delivers the best brands and technology to its customers. The President's focus on expanding product offerings and enhancing service capabilities directly supports Johnstone Supply's mission to be the leading wholesale distributor for HVACR professionals.

    Raj Hiremath - President (Arizona, Nevada & Mississippi)

    Raj Hiremath, the President (Arizona, Nevada & Mississippi) at Johnstone Supply, directs comprehensive business operations and strategic expansion across these key states. Hiremath ensures the consistent availability of Johnstone Supply's vast selection of equipment and genuine OEM parts, catering to the diverse needs of professional HVACR contractors in Arizona, Nevada, and Mississippi. This leadership is vital for upholding the company's commitment to providing replacements for nearly every major brand, supported by an extensive cross-reference system that simplifies sourcing hard-to-find components. By optimizing regional logistics and fostering strong customer relationships, Hiremath drives market share and operational efficiency. The President's focus on expanding the portfolio of brands and technology directly supports the company's mission to equip contractors with superior solutions.
    Raj Hiremath

    Stacy Cardwell - Chief Human Resources Officer

    Stacy Cardwell, the Chief Human Resources Officer at Johnstone Supply, architects the company's talent management and organizational development strategies. Cardwell oversees all human resources functions, including recruitment, employee relations, compensation, and benefits, ensuring a skilled and motivated workforce. This critical role supports Johnstone Supply's objective of providing professional HVACR contractors with the largest selection of equipment and genuine OEM parts by fostering a culture of excellence and continuous improvement. By developing comprehensive HR programs, Cardwell ensures that the company attracts and retains top talent essential for sourcing hard-to-find parts and maintaining an ever-expanding product selection. The Chief Human Resources Officer's strategic initiatives directly contribute to operational efficiency and the overall success of the business, reinforcing the company's commitment to its contractors and its expanding market presence.

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    Frequently Asked Questions Regarding Johnstone Supply Top Executives and Leadership Team

    Who leads Johnstone Supply?
    Johnstone Supply is led by Tina Mutz (Chief Executive Officer - White Plains, NY), along with executives such as Robert Hollasch (Chief Financial Officer) and Timothy Cameron (President (Savannah)).
    Who is part of Johnstone Supply’s executive team?
    The executive team of Johnstone Supply includes leaders such as Tina Mutz (Chief Executive Officer - White Plains, NY), Robert Hollasch (Chief Financial Officer), Timothy Cameron (President (Savannah)) and other senior executives.
    How many executives does Johnstone Supply have?
    Johnstone Supply has 10 executives leading key business areas.
    What roles are included in Johnstone Supply’s leadership team?
    The leadership team of Johnstone Supply includes roles such as Chief Executive Officer - White Plains, NY, Chief Financial Officer, President (Savannah), President (Greenville), President, The Wines Group.