Ausenco is a fast-growing company with big ideas. We redefine what’s possible in some of the world’s most complex projects and toughest environments. Delivering innovative, value-add consulting, project delivery, asset operations and maintenance solutions is what we do. From 26 offices in 15 countries, with projects in over 80 locations worldwide, we create sustainable outcomes for our people, clients, and communities.

At this time, we are seeking a Comminution Specialist to join our Consulting Services team and lead comminution-related work across our North American study portfolio. This is a senior technical specialist role for a recognised authority in comminution circuit design and optimisation — someone clients and project teams turn to for an independent, defensible view on crushing and grinding circuit selection, sizing, and performance.

You will lead comminution studies from scoping through to feasibility-level deliverables, working alongside process engineers, geometallurgists, and project managers to ensure comminution circuit decisions are technically sound, appropriately risk-adjusted, and aligned with each project's economic drivers. You will also act as a technical reviewer and mentor across the wider process team, raising the standard of comminution work across our North American studies.

About the Role

• Lead comminution circuit design and optimisation studies (scoping, pre-feasibility, and feasibility level) for North American projects, including greenfield circuit selection and brownfield/expansion optimisation.
• Direct and interpret ore characterisation test work programs, selecting appropriate methodologies (e.g. Bond ball and rod mill work index, SMC/SAG mill comminution testing, JK Drop Weight, abrasion and crusher work indices, point load testing) based on project stage, ore variability, and study objectives.
• Apply and critically evaluate comminution models (e.g. JKSimMet, SAGMILLING.com/Morrell methodologies, Bond-based sizing, DEM-based approaches) to size and simulate crushing, HPGR, SAG, ball, and vertical/stirred milling circuits.
• Lead technical evaluations and trade-off studies comparing circuit configurations (e.g. SABC vs. crush-HPGR-ball, conventional vs. stirred fine grinding) on the basis of capital cost, operating cost, energy intensity, throughput risk, and ore variability.
• Contribute comminution expertise to broader flowsheet development, geometallurgical program design, and energy/carbon footprint assessments.
• Provide technical review, quality assurance, and mentoring for comminution deliverables prepared by project teams across North America.
• Support business development activities, including technical proposal input, client presentations, and scoping discussions.
• Represent Ausenco's comminution capability externally through conference papers, industry associations, and client relationships, maintaining and building Ausenco's reputation as a trusted technical authority in this field.
• Stay current with emerging comminution technologies, testing methods, and modelling approaches, and help embed relevant advances into Ausenco's standard practice.

About You

• Minimum 10 years' experience in comminution, spanning operations, engineering, or a combination of both
• Recognised as a leading consultant or subject matter expert in comminution circuit design and optimisation, with a track record of technical leadership on studies of increasing scale and complexity.
• Deep, hands-on familiarity with a broad range of comminution models and simulation platforms, and with the ore characterisation methods and test technologies that feed them.
• Strong grounding in the economic and risk trade-offs behind circuit selection decisions, and the ability to communicate technical recommendations clearly to non-specialist stakeholders and clients.
• Degree qualification in metallurgical, mineral processing, mining, or chemical engineering (or equivalent); postgraduate qualification an asset.
• Extensive industry experience in comminution circuit design, process engineering, or metallurgical consulting, ideally spanning both operations and study/consulting environments.
• Demonstrated experience leading technical work streams and mentoring junior and mid-level engineers.
• Eligible to work in Canada or the United States; willingness to travel to project sites and client offices across North America as required.
• Professional engineering registration (e.g. P.Eng.) or eligibility for registration is preferred.

We’re committed to a fair and human hiring process. All applications are reviewed by a member of our team and are not automatically screened or rejected by AI.

Why Ausenco?  

We support individual growth and aim to allow you to work in a way that plays to your strengths. Beyond a competitive remuneration package we offer: 

Career advancement - Embark on a journey of continuous growth through technical training, mentorship initiatives, and networking opportunities

Holistic approach to wellness – Take a proactive approach to your overall wellbeing. Access to confidential counselling, information services and a benefits program that supports your health & wellness

Accessible leadership team – Work with highly reputable industry leaders who value your contribution.

Our people don’t settle for the status quo. If you have an entrepreneurial spirit and want to help set a new standard in sustainability, we’ll help you find your place. This means working with you to develop a unique career path and skillset to match your ambition.

We’re proud of the work we do, and we do it within a culture that is open, honest, and cooperative. We have a history of attracting visionary people who embrace challenges and deliver creative solutions for every project, and your voice is an important part of the conversation.

As a global company we embrace and encourage diversity in its fullest sense – gender identity, gender expression, sexual orientation, age, experience, nationality, colour, language, religion, location, disability, education, skills, working styles and time availability. Our work environments are based on mutual trust and respect for the rights and opportunities of every individual.

Salary range: $150,000 - $190,000

Salary is determined by factors such as qualifications, relevant years of experience, and prevailing market conditions for the specific role.

Join us and work a better way.