General Manager – Mechanical Construction Location: Greater Toronto Area (Newmarket, ON) Kolostat has retained Harbinger Network Inc. to lead the search for its next General Manager for the Greater Toronto Area . This is a rare opportunity for a proven mechanical construction leader to step into a highly visible role with full operational and strategic accountability. The mandate is to build on a strong, established foundation and work alongside an energized leadership group to scale operations, strengthen market position, and drive the GTA business to new levels of performance. About the Role As General Manager, you will oversee the overall performance, profitability, and strategic direction of the mechanical construction division. Reporting to senior leadership, you will lead project delivery, operations, finance, health and safety, and business development while ensuring projects are executed safely, on schedule, and within budget. Key Responsibilities Leadership & Strategy Provide overall leadership and strategic direction for the mechanical construction operations in Ontario. Translate corporate objectives into clear operational plans and measurable goals. Foster a strong performance-driven culture focused on accountability, safety, quality, and collaboration. Act as a key member of the executive leadership team, contributing to long-term business growth and succession planning. Operations & Project Delivery Oversee all mechanical construction projects from pre-construction through close-out. Ensure efficient allocation of resources (labour, equipment, materials) across projects. Maintain a strong field presence and work closely with Project Managers, Superintendents, and Foremen. Implement and continuously improve operational processes, execution strategies, and productivity standards. Resolve major operational, technical, or contractual issues that may impact the project performance. Financial Management Full P&L responsibility for the mechanical construction division. Develop and manage annual operating budgets, forecasts, and cash flow. Monitor project financial performance, cost controls, margins, and risk exposure. Review and approve major bids, contracts, change orders, and claims. Drive profitability through cost optimization, operational efficiency, and disciplined project controls. Health, Safety & Compliance Champion a strong safety culture aligned with Ontario legislation and industry’s best practices. Ensure compliance with OHSA, WSIB, union agreements, and company safety programs. Oversee implementation of health, safety, and quality control processes across all job sites. Lead investigations and corrective actions related to incidents or non-compliance. People Management & Talent Development Lead, mentor, and develop senior leaders (Directors, Project Managers, Operations Managers). Support workforce planning, recruitment, performance management, and succession planning. Promote employee engagement, training, and leadership development across the organization. Collaborate with Human Resources on labour relations, organizational structure, and change management initiatives. Business Development & Client Relations Build and maintain strong relationships with key clients, general contractors, consultants, and partners. Support business development activities, including strategic pursuits and market expansion. Represent the company professionally in industry associations and client meetings. Ensure high levels of client satisfaction and repeat business. Qualifications • Senior leadership experience within mechanical construction • Strong background in HVAC, plumbing, and mechanical systems • Proven success managing operations, project delivery, and P&L • Strong knowledge of Ontario construction regulations and safety standards • Excellent leadership, communication, and problem-solving skills • Strategic, results-driven, and capable of leading high-performing teams About KOLOSTAT Kolostat Inc. is a long-standing Canadian leader in mechanical construction and integrated HVAC solutions, with roots dating back to 1927 . With 300+ employees and a national presence spanning Montreal, Toronto, and beyond, Kolostat has built a reputation for delivering complex construction, energy, and service projects across commercial, industrial, and mission-critical environments. Their integrated approach to design-build, energy optimization, and maintenance has positioned them as a trusted partner to building owners seeking performance, reliability, and sustainability. About Harbinger Network Inc Harbinger Network Inc. is a Canadian-based firm serving companies across Canada and the USA through a diverse network of recruiters and expertise spanning more than 10 major disciplines, with a mission to connect exceptional professionals with organizations across North America and deliver talent that integrates seamlessly and makes an immediate impact; to apply for the position of General Manager – Mechanical Construction – Greater Toronto Area in confidence, please submit your resume to: Tony Labora, President Phone: Ext. 101 Email: To learn more about Harbinger Network, visit or contact us at . Disclosure This posting represents an active and genuine vacancy with one of Harbinger Network’s clients and is not for speculative or pipeline recruitment. Harbinger Network and/or our clients may use AI-assisted tools to support the screening and evaluation of applications; however, these tools are not intended to replace the Hiring Manager’s judgement or decision-making in the hiring process.