Principal Mechanical Engineer

Responsibilities

• Lead project progress through weekly design meetings, formal reviews, and key milestone workshops such as SID and HAZOP
• Oversee the development, quality assurance, and finalisation of engineering drawings, design reports, and client-specific deliverables
• Manage the production of specialist reports, including Site Access, Tenure, and Environmental & Planning (STEP) documentation
• Collaborate with delivery partners, suppliers, and subcontractors to prepare specifications and review technical submissions
• Work within multidisciplinary teams to define and select best-value technical solutions aligned with client outcomes
• Identify risks and opportunities, driving mitigation strategies and maximising project value
• Manage design budgets, schedules, and change processes, including earned value tracking
• Mentor and develop junior engineers to foster a high-performing technical environment
• Build strong relationships with internal stakeholders and external clients
• Provide technical input into bid pursuits to support business growth

Requirements

• Bachelor’s Degree in Mechanical or Civil Engineering
• CPEng and RPEQ certification (or ability to obtain within 6-12 months)
• Proven experience delivering and leading water and wastewater projects, preferably within design and construct (D&C) environments
• Broad understanding of wastewater treatment processes, wastewater networks, and water networks
• Extensive knowledge of local and national standards, including Water Services Association of Australia (WSAA)
• Proficiency in Microsoft Office applications (Word, Excel, PowerPoint, Project)
• Excellent communication and written skills with the ability to maintain strong client relationships

Benefits

• Flexible and agile work atmosphere to support professional and personal life
• Competitive salary with Discretionary Group and Personal Performance Bonuses
• Comprehensive insurance coverage including life, personal accident, and salary continuance
• Option to purchase extra annual leave to enhance work-life balance
• Employee ownership model providing a direct stake in the company's success

About the Company

Mott MacDonald is a vibrant and forward-thinking engineering, management, and development consultancy. We work as a global team to plan, design, deliver, and maintain the essential infrastructure—including transport, energy, and water—that is integral to people’s daily lives.