Reliance Home Comfort Executive and Leadership Team

July, 2026

Leadership Overview

Reliance Home Comfort has 7 executives leading key functions including information technology, finance, revenue generation, and presidential oversight.

Driven by a commitment to customer satisfaction, Reliance Home Comfort provides essential residential services across Canada, focusing on reliable rental, sales, and maintenance for water heaters and HVAC systems, thereby enhancing home comfort and operational efficiency for countless households.

Leadership Roles at Reliance Home Comfort

  • Chief Financial Officer - Demi Tsioros
  • Office Of The President - Gemma Willson
  • Office Of The President - Karen Bisson
  • President, Mackenzie Plumbing & Heating Ltd (1989) - Douglas MacKenzie
  • Office Of The President - Nicole Cousley
  • Chief Information Officer - Celso Mello
  • Chief Revenue Officer & Manager - William Lin
  • Demi Tsioros - Chief Financial Officer

    Demi Tsioros, the Chief Financial Officer at Reliance Home Comfort, manages the company's financial health and strategic fiscal planning. Tsioros oversees all financial operations, including budgeting, forecasting, and financial reporting, ensuring robust fiscal management for the company's extensive operations in water heater and HVAC system rentals and maintenance. This critical role involves optimizing financial performance, managing capital allocation, and ensuring compliance with all financial regulations across Canada. By implementing sound financial strategies, Demi Tsioros supports the company's expansion and operational efficiency, particularly in its largest base in Ontario and offices in western Canada. The Chief Financial Officer's objective is to drive profitability and sustainable financial growth, underpinning the company's market position.

    Gemma Willson - Office Of The President

    Gemma Willson, the Office Of The President at Reliance Home Comfort, provides strategic oversight and executive direction to key organizational initiatives. Willson collaborates with leadership to advance the company's mission of delivering reliable residential services, focusing on the rental, sales, and maintenance of water heaters and HVAC systems. This role involves guiding operational improvements and ensuring alignment with corporate objectives across all Canadian markets, including Ontario and western Canada. By contributing to high-level decision-making, Gemma Willson supports the sustained growth and operational excellence of Reliance Home Comfort. The Office Of The President's involvement ensures strategic priorities are effectively translated into actionable plans for enhanced service delivery.

    Karen Bisson - Office Of The President

    Karen Bisson, the Office Of The President at Reliance Home Comfort, contributes executive leadership to critical business functions and strategic planning. Bisson works to enhance the company's service offerings in water heater and HVAC system rentals, sales, and maintenance, ensuring high standards of customer satisfaction. This position involves driving key projects and fostering cross-departmental collaboration to achieve organizational goals across its operational footprint in Ontario and western Canada. By providing strategic guidance, Karen Bisson supports the company's commitment to operational efficiency and market leadership. The Office Of The President's focus is on executing strategic directives that promote long-term success and service quality.

    Douglas MacKenzie - President, Mackenzie Plumbing & Heating Ltd (1989)

    Douglas MacKenzie, the President, Mackenzie Plumbing & Heating Ltd (1989) at Reliance Home Comfort, brings extensive experience in plumbing and heating services to the executive team. MacKenzie oversees operations related to the company's core offerings, including the rental, sales, and maintenance of water heaters and HVAC systems, leveraging deep industry knowledge. This leadership role ensures the integration of specialized expertise, particularly within the Ontario market where Mackenzie Plumbing & Heating Ltd has a strong legacy. By guiding operational strategies, Douglas MacKenzie contributes to the company's ability to deliver high-quality, reliable services. The President, Mackenzie Plumbing & Heating Ltd (1989)'s input is vital for maintaining service excellence and expanding market reach.

    Nicole Cousley - Office Of The President

    Nicole Cousley, the Office Of The President at Reliance Home Comfort, provides executive leadership and strategic direction for key organizational priorities. Cousley focuses on enhancing the company's service delivery model for water heaters and HVAC systems, encompassing rental, sales, and maintenance operations. This role involves driving initiatives that improve customer engagement and operational effectiveness across all regions, including Ontario and western Canada. By contributing to strategic decision-making, Nicole Cousley supports the company's commitment to excellence and growth. The Office Of The President's efforts are directed towards ensuring seamless execution of corporate strategies and maintaining Reliance Home Comfort's reputation for reliability.

    Celso Mello - Chief Information Officer

    Celso Mello, the Chief Information Officer at Reliance Home Comfort, directs the company's technology strategy and infrastructure. Overseeing all IT operations, Mello ensures the seamless integration of digital solutions that support the company's extensive rental and maintenance services for water heaters and HVAC systems. This leadership role involves managing cybersecurity protocols, data management systems, and the technological backbone that enables efficient customer service and operational scaling across Ontario and western Canada. By optimizing digital platforms, Celso Mello drives technological innovation, enhancing both internal efficiency and the customer experience. The Chief Information Officer's focus remains on leveraging technology to support business growth and maintain a competitive edge in the residential services market.

    William Lin - Chief Revenue Officer & Manager

    William Lin, the Chief Revenue Officer & Manager at Reliance Home Comfort, spearheads revenue generation and sales strategy across all business segments. Lin directs initiatives focused on expanding the company's market share in the rental, sales, and maintenance of water heaters and HVAC systems. This leadership position involves optimizing sales channels, developing customer acquisition strategies, and fostering strong client relationships to drive consistent revenue growth. By aligning sales efforts with market demands, William Lin ensures the company capitalizes on opportunities within Ontario and western Canada. The Chief Revenue Officer & Manager's primary focus is maximizing financial returns and solidifying Reliance Home Comfort's position as a leading provider of residential services through effective revenue management.

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    Frequently Asked Questions Regarding Reliance Home Comfort Top Executives and Leadership Team

    Who leads Reliance Home Comfort?
    Reliance Home Comfort is led by Demi Tsioros (Chief Financial Officer), along with executives such as Gemma Willson (Office Of The President) and Karen Bisson (Office Of The President).
    Who is part of Reliance Home Comfort’s executive team?
    The executive team of Reliance Home Comfort includes leaders such as Demi Tsioros (Chief Financial Officer), Gemma Willson (Office Of The President), Karen Bisson (Office Of The President) and other senior executives.
    How many executives does Reliance Home Comfort have?
    Reliance Home Comfort has 7 executives leading key business areas.
    What roles are included in Reliance Home Comfort’s leadership team?
    The leadership team of Reliance Home Comfort includes roles such as Chief Financial Officer, Office Of The President, Office Of The President, President, Mackenzie Plumbing & Heating Ltd (1989), Office Of The President.