Sustainability Manager

The core mission is to make sure a major transmission project actually delivers the sustainability outcomes it has committed to, not just on paper, but through the way it's designed, procured, built, and reported. Day to day, that means providing technical advice to project teams, maintaining and updating Sustainability Management Plans, coordinating the evidence and documentation required for an Infrastructure Sustainability V2.2 rating, and tracking performance against targets. A significant share of the role is governance and assurance: supporting audits, ensuring compliance with sustainability commitments, and producing performance reports for internal and client audiences. You'd also be expected to spot improvement opportunities (where the project could do better on carbon, materials, waste, or community outcomes) and push them through design, engineering, procurement, construction, and project controls. The longer-term objective is capability building. Downer wants a high-performing sustainability culture on the project, which means your success is partly measured by whether engineers, planners, and site teams start making sustainability decisions without needing you in the room.

This role offers deep, hands-on exposure to the Infrastructure Sustainability Council rating process, one of the most transferable credentials in Australian infrastructure sustainability. You'd learn how rating credits are interpreted, evidenced, and defended through audits, which is knowledge that's hard to gain outside a live project. Working across design, procurement, construction, and project controls also builds a systems view of how sustainability actually gets delivered on major builds. There's meaningful development in stakeholder influence and capability building. Coaching project teams and engaging clients sharpens the consulting and communication skills that senior sustainability roles depend on. Downer's scale (18,000-plus employees across Australia and New Zealand) means exposure to established sustainability frameworks, reporting practices, and a wider professional network. Because the role sits within an Energy & Utilities business focused on decarbonisation and net zero, you'd also gain sector-specific insight into transmission, renewables, and utility infrastructure. That combination of rating expertise, project delivery experience, and energy-sector knowledge positions candidates well for senior sustainability or environment roles on future major projects.

The strongest candidates will have demonstrated experience delivering an Infrastructure Sustainability Council rating or a comparable framework on a major project. That's the clearest technical gate. Beyond that, Downer is looking for a track record in sustainability management within infrastructure, construction, utilities, or major projects, environments where sustainability is delivered through others rather than in isolation. Practical skills matter: developing and implementing Sustainability Management Plans, leading audits and compliance activities, and producing credible performance reporting. Experience evidencing value-for-money and industry best practice suggests they want someone who can argue the business case, not just the environmental one. Relevant qualifications in environmental science, engineering, sustainability, or a related discipline would be expected, though the posting emphasises experience over credentials. On the softer side, the role demands strong communication and relationship management. The ability to engage and influence a wide range of internal and external stakeholders is listed explicitly, as is a collaborative approach and commitment to building high-performing teams. A genuine commitment to safety and environmental responsibility is non-negotiable at Downer given its Zero Harm framing. Site-based readiness and willingness to work within a project delivery culture would round out the profile.

Lead with the rating. Downer explicitly asks for demonstrated experience delivering an Infrastructure Sustainability Council rating tool or similar, so your resume and cover letter should foreground specific projects where you did that, the rating version, the project scale, your exact role, and the outcome achieved. Vague claims about sustainability experience won't clear this bar. Quantify where possible: credits delivered, audit results, performance improvements, or reporting milestones met. Show you understand delivery, not just frameworks. This is a site-based role on a major transmission project, so evidence that you've worked within construction, utilities, or infrastructure delivery environments (influencing engineers, procurement teams, and project controls) will resonate. The cover letter should speak to how you've built sustainability capability in teams and managed competing project pressures, ideally with a concrete example of a sustainability improvement you pushed through against resistance. Align with Downer's language. The posting emphasises safety, Zero Harm, collaboration, and decarbonisation. Referencing how your approach fits a Zero Harm culture and a net zero agenda signals you've read carefully rather than applied generically. Given the stated commitment to diversity and inclusion, and the encouragement of applications from Aboriginal and Torres Strait Islander peoples and other underrepresented groups, candidates can feel confident the process is genuinely open. Finally, note the explicit warning about recruitment agencies, direct applications only.

The core focus is almost certainly the Infrastructure Sustainability V2.2 rating, which means the role touches the full spread of IS categories, carbon and energy, materials, water, waste, ecology, and community outcomes. On a transmission project, embodied carbon in steel and concrete, construction-phase emissions, and responsible sourcing are likely recurring themes. Downer's framing around decarbonisation and net zero suggests the role contributes to the company's broader climate commitments as well as project-level targets. Governance and reporting also feature heavily: sustainability management plans, rating pathways, audit trails, and performance reporting to both internal leadership and the client. This is where environmental and governance dimensions of ESG meet. On the social side, a major transmission project carries real community and stakeholder sensitivities, land access, local impact, workforce practices. The role's stakeholder engagement remit suggests you'd help manage how the project's sustainability story is told and substantiated, rather than leaving it to communications alone. Downer's Energy & Utilities business spans transmission, distribution, renewables, water, and telecommunications, so the sustainability practices developed here could influence how similar projects are delivered across the portfolio.

The biggest challenge is likely influence without direct authority. On a major construction project, sustainability competes with cost, schedule, and delivery pressure. Getting engineering and construction teams to adopt a more sustainable material, method, or documentation practice often means making a persuasive case in the moment, not issuing instructions. That demands credibility and persistence. Rating delivery brings its own pressure. IS V2.2 requires disciplined evidence collection across many credits, and gaps are usually discovered late unless documentation is managed continuously. Balancing that rigour with the pace of a live project, where work fronts move faster than paperwork, is a genuine tension. Audits and compliance activities add fixed deadlines that won't move. Site-based working introduces practical demands: travel, time on active construction areas, and coordination across dispersed teams. There may also be complexity in aligning the client's sustainability expectations with Downer's own commitments when priorities or reporting formats differ. Managing that interface diplomatically could be one of the more delicate parts of the job.

A site-based sustainability manager on a transmission project likely starts the day checking in with project teams on active work fronts, reviewing whether environmental controls and sustainability commitments are being met. Much of the day involves meetings with engineering, procurement, and construction colleagues to embed sustainability into decisions already in motion, a design change, a materials choice, a waste route. You might spend time updating the Sustainability Management Plan, preparing data for IS V2.2 rating evidence, or reviewing documentation before an audit. Stakeholder engagement is woven through the week rather than blocked into one slot. That could mean briefing a client representative on performance, coordinating with the Environmental, Planning and Sustainability Director, or coaching a project engineer on what a particular rating credit actually requires in practice. Variability comes from project phase, during design and procurement the emphasis leans toward planning and influence, while during construction it shifts toward monitoring, compliance, and reporting. Audit periods and rating submission deadlines will compress the calendar noticeably. Expect a rhythm that blends technical sustainability work with relationship management, because on a major project the role succeeds or fails on whether others act on your advice.

Downer is a large organisation with a stated emphasis on career development, and this role sits in a business line, Energy & Utilities, that is central to its decarbonisation agenda. That combination creates plausible pathways. Successfully delivering an IS V2.2 rating on a nationally significant transmission project would be a strong credential, potentially opening moves into more senior sustainability roles, larger or more complex projects, or portfolio-level positions within Downer. Lateral development is also realistic. The skills gained here (rating expertise, project delivery, stakeholder influence) transfer across Downer's transmission, distribution, renewables, water, and telecommunications work. Someone who builds a reputation for getting sustainability outcomes delivered on site could move into advisory, bid, or strategy functions. There's also the international dimension the posting hints at, with an expert collaborative team sharing a decarbonisation and net zero agenda. That suggests exposure beyond the immediate project and possible collaboration with colleagues across Australia and New Zealand. Growth here likely depends on visibility and results, the role rewards those who can show measurable impact.

The most immediate relationship is with the Environmental, Planning and Sustainability Director, who sets direction and to whom this role reports. You'd also work closely within the Sustainability & Zero Harm team, sharing methods and lessons with peers across Downer's Energy & Utilities business. Project directors and managers are key internal stakeholders, since they control the schedule and budget decisions that sustainability outcomes depend on. Engineering, procurement, construction, and project controls functions are where much of the influencing happens. These teams hold the design choices, supplier decisions, and site practices that determine whether rating credits are achievable. You'd likely interact with them daily, sometimes advocating for approaches that add short-term effort for long-term sustainability gain. The client on the transmission project is another central stakeholder, particularly around rating evidence, reporting, and compliance expectations. External auditors and Infrastructure Sustainability Council processes will also feature, as will community or land-related stakeholders where the project touches local interests. Internationally, Downer references an expert collaborative team sharing a decarbonisation agenda, suggesting some cross-border knowledge exchange with colleagues in New Zealand and beyond.