Water & Wastewater Design Lead — Senior Process Engineer

TRILITY; Sydney; On-site; AUD 150,000 - 190,000; Full time

Benefits offered by this job

Competitive base salary + incentive +

Dynamic and positive culture

Paid parental leave

Reward and recognition program

Wellbeing program with Headspace

Genuine impact on TRILITY

Job summary

TRILITY is seeking a Design and Commissioning Manager (Senior Process Engineer) to lead and coordinate the design and commissioning of municipal water and wastewater projects in NSW/VIC. Based in NSW or VIC, you’ll drive multidisciplinary teams, ensure QA and documentation, and provide technical input across the business.

You will mentor engineers, support business development, and act as commissioning lead on major projects, shaping TRILITY’s capabilities and service delivery in Australia and

Qualifications

• 10–15 years’ experience leading design in complex multidisciplinary engineering environments.
• Degree in Chemical or Mechanical Engineering.
• Strong knowledge of water and wastewater treatment technologies.
• Excellent leadership, communication and stakeholder management skills.
• Experience with project and quality management systems.
• Experience with document and drawing management systems.
• Knowledge of the water industry in Australia and New Zealand.
• Willing to travel to meet project needs.

Responsibilities

• Lead conceptual and detailed process/mechanical design for municipal water and wastewater projects.
• Coordinate multidisciplinary design teams across projects and tenders (30+ people).
• Implement robust QA and document management systems.
• Facilitate design reviews including HAZOP and SiD.
• Support early-stage business development with technical input and risk assessment.
• Act as Commissioning Manager on major projects; lead integrated commissioning teams.
• Mentor junior engineers and collaborate with consultants, subcontractors and suppliers.

Skills

Design leadership

Project management

Stakeholder mgmt

HAZOP

SiD

Water/wastewater tech

Leadership

Travel flexibility

Education

Chemical or Mechanical Engineering degree

Tools

Document management systems

Drawing management systems

Multidisciplinary design tools

Job description

TRILITY is seeking a Design and Commissioning Manager (Senior Process Engineer) to lead and coordinate the design and commissioning of municipal water and wastewater projects in NSW/VIC. Based in NSW or VIC, you’ll drive multidisciplinary teams, ensure QA and documentation, and provide technical input across the business.

You will mentor engineers, support business development, and act as commissioning lead on major projects, shaping TRILITY’s capabilities and service delivery in Australia and