Assistant Commercial Manager (Greater Toronto Area, ON) Kenaidan and Murphy are excited to announce a joint venture dedicated to bringing global innovation to infrastructure projects across Ontario. Kenaidan Murphy Joint Venture (KMJV) is supporting a major transit infrastructure project in the Niagara/Hamilton Region. Founded in 1974, Kenaidan continues to be a fixture as a dynamic construction firm dedicated to creating structures that will contribute to the well‑being of our community and enhance the fabric of our communities for years to come. Our confidence in our expertise and passion for our work has allowed us to deliver an array of projects with unmatched precision, quality, and efficiency. From general contracting to construction management, we deploy a collaborative approach, embedding innovation and sustainability into every project. #TeamKenaidan. Murphy operates in the United Kingdom, Ireland, Canada and America as a leading international specialist engineering and construction company. Founded in 1951, we are committed to improving life through delivering world‑class infrastructure, providing engineered solutions across transportation, natural resources, energy, and water sectors. With around 4,000 engineers, professional managers, and skilled operatives internationally, we work together as One Murphy to ensure project success. #MoveToMurphy. We are a proud Equal Opportunity Employer, committed to providing employees work‑life balance with a competitive compensation package including:
Top wages
Benefit coverage for you and your dependents
Employer RRSP contributions (no match required)
Paid Time Off
We currently have an opening in Niagara/Hamilton ON for a: Assistant Commercial Manager.




The Assistant Commercial Manager will support the commercial management of a major rail/transit infrastructure project. This role works closely with project leadership, subcontractors, and consultants to ensure strong cost control, contract compliance, and overall financial performance of the project.
To perform this role successfully, the candidate will be responsible for but not limited to the following:
Assist in the administration of prime contracts and subcontract agreements
Support change management processes including tracking, pricing, and negotiating change orders and variations
Monitor project costs, budgets, and forecasts to ensure alignment with financial objectives
Assist in preparing cost reports, cash flow forecasts, and monthly financial reviews
Support cost value reconciliation (CVR) and variance analysis
Review and process subcontractor payment applications and invoices
Assist with procurement and commercial onboarding of subcontractors and suppliers
Identify and track commercial risks and opportunities throughout the project lifecycle
Support preparation and submission of claims and assist in dispute resolution processes
Maintain accurate commercial records, including contracts, correspondence, and cost documentation
Liaise with project teams, consultants, and clients to resolve commercial and contractual issues
Ensure compliance with contractual obligations and company commercial procedures




Education and Experience:
Diploma or degree in Construction Management, Engineering, Quantity Surveying, or a related field
4–8+ years of experience in commercial management, cost control, or contract administration within construction projects
Experience working on infrastructure or transit projects is preferred
Strong understanding of construction contracts, cost management, and procurement processes
Experience managing subcontractor commercial activities and financial reporting
Familiarity with contract forms (e.g., CCDC) and commercial documentation
Strong commercial awareness and analytical skills
Excellent communication and stakeholder management abilities
Ability to manage multiple priorities and meet tight deadlines
Detail-oriented with solid organizational and reporting skills
Problem‑solving mindset with the ability to manage commercial risks proactively
Working knowledge of commercial and project tools (e.g., Excel, Procore, ERP systems)
Experience working within Construction Management, Design‑Build, Progressive Design‑Build, Alliance, or Joint Venture environments is highly desirable.
Familiarity with Metrolinx, GO Expansion, TTC, municipal, provincial, or public‑sector clients is considered a strong asset.
Salary Range: Between $140,000 - $165,000, depending on experience.
We are an inclusive and equal opportunity employer committed to providing diversity and accommodation for applicants upon request in accordance with the Accessibility for Ontarians with Disabilities Act (AODA).
This is a non‑management position. This is a full‑time position.
Visit Careers at Kenaidan Contracting Ltd.

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📌 Assistant Commercial Manager (Greater Toronto Area, ON) (Ontario)
🏢 Kenaidan Contracting
📍 Ontario