ESG Consulting in Australia: When and Why to Hire an ESG Consultant

You know you need to build ESG strategy. But should you do it entirely in-house, or bring in external consultants? What kind of consultant? How much does it cost? How do you know if it’s worth the investment?

This guide helps you think through when and how to use ESG consultants effectively. Many Australian businesses use a hybrid approach—external advisors guide strategy, internal teams drive implementation. This guide covers how to do it well. For context on ESG strategy development, see our complete guide to building ESG strategy.

When Should You Consider Hiring an ESG Consultant?

You Should Hire a Consultant If:

You lack internal ESG expertise. If your organisation doesn’t have people with deep ESG knowledge, especially around materiality assessment, AASB compliance, risk management, or stakeholder engagement, external expertise accelerates learning and improves quality.

You need credibility with stakeholders. Investors and regulators sometimes give more weight to recommendations from independent external advisors. If you’re trying to build stakeholder confidence, external validation helps.

You need bandwidth. ESG strategy development is time-intensive. If your small team is already stretched, consultants can provide bandwidth while building internal capability.

You’re facing tight timelines. If you need to meet AASB S1/S2 disclosure deadlines or respond to investor pressure, external expertise can accelerate timelines.

You need to work across complex supply chains or geographies. If your business has complex supply chains or significant international operations, external specialists in supply chain risk or regional compliance are valuable.

You’re designing new systems (data, governance). If you need to build new ESG data collection systems, governance structures, or reporting processes, consultants with experience across multiple organisations bring valuable comparative perspective.

You Might Manage In-House If:

You have strong internal ESG capability. Some large organisations have experienced sustainability directors who’ve led ESG programmes elsewhere. They can drive strategy internally.

Your ESG issues are relatively straightforward. Some smaller businesses with limited supply chains and operations have more straightforward materiality assessment and strategy. In-house development can work.

You have sufficient internal bandwidth. If you have team capacity and expertise, in-house development builds organisational learning and ownership.

Budget is extremely constrained. If you have no budget for consultants, you’ll need to develop in-house. It will take longer, but it’s possible.

Most organisations use a hybrid: external advisors guide strategy development and system design; internal teams own implementation and ongoing management.

Types of ESG Consultants and Services

Big 4 and Management Consulting Firms

Examples: Deloitte, EY, KPMG, PwC, McKinsey, Boston Consulting Group

Strengths: Broad capabilities across strategy, governance, data systems, and implementation. Large teams mean capacity for big, complex programmes. Strong relationships with boards and regulators. Good at change management and organisational design.

Weaknesses: Expensive (often $200-400+ per hour for senior staff). May lack deep specialisation in specific ESG areas. One-size-fits-all approach can feel generic.

Best for: Large organisations needing comprehensive ESG strategy, significant system transformation, board-level stakeholder management.

Specialist Sustainability Consultancies

Examples: ERM, Sustainalytics, Burson Cohn & Wolfe, Ethisphere, local Australian firms

Strengths: Deep ESG specialisation. Up-to-date on emerging frameworks and best practices. Often more cost-effective than Big 4. Can focus deeply on specific areas (climate, supply chain, governance, Indigenous engagement).

Weaknesses: May lack board relationships or change management expertise. Smaller teams mean potentially less capacity for very large programmes.

Best for: Mid-sized companies needing specialised ESG expertise, specific issue deep-dives (climate risk, supply chain, materiality assessment).

Niche Specialists

Examples: Climate risk modelling firms, supply chain auditors, Indigenous engagement specialists, governance experts

Strengths: Exceptional depth in specific domains. Often very cost-effective for focused work.

Weaknesses: Limited to specific expertise area. May not have broader ESG integration perspective.

Best for: Focused projects (climate risk analysis, supply chain risk assessment, board capability building).

In-House Advisors vs. External Consulting Firms

In-house teams (your own hire): Bring continuity, deep company knowledge, sustained commitment. Building internal capability is valuable long-term. Takes time to recruit and onboard.

Consulting firms: Bring external expertise, comparative experience, defined project scope. Good for initial strategy development and system design. Can transition to in-house team delivery once frameworks are established.

Many organisations hire an external consultant for 6-12 month ESG strategy development, then build internal capability to lead ongoing management and reporting.

What ESG Consultants Typically Do

Strategy Development

• Facilitate materiality assessment (stakeholder engagement, issue assessment)
• Develop ESG vision, strategic pillars, goals, and targets
• Create implementation roadmap
• Design ESG governance and accountability structures

Compliance and Reporting

• Assess AASB S1/S2 requirements and readiness
• Design ESG data collection and management systems
• Develop sustainability reporting and disclosure
• Support third-party assurance processes

Risk Management

• Identify and assess ESG risks
• Conduct climate scenario analysis and financial quantification
• Design risk response plans
• Assess supply chain risks

Capability Building

• Train board and executive leadership on ESG
• Develop functional capability (HR, procurement, finance)
• Build ESG community of practice

Stakeholder Engagement

• Facilitate investor consultations
• Design and facilitate community engagement and consultation
• Conduct Indigenous engagement processes

How to Choose the Right ESG Consultant

Step 1: Define Your Scope and Needs

Be clear about what you need:

• Do you need full ESG strategy development or specific work areas?
• Do you need capability building or just deliverables?
• What’s your timeline?
• What’s your budget range?
• Do you have board/executive preferences for consultant type?

More specific scope helps you identify right consultant and get better proposals.

Step 2: Research and Shortlist

Get recommendations from peers, professional networks, board members. Shortlist 3-5 consultants with demonstrated Australia experience. Look for:

• Track record in your industry
• Depth of ESG expertise vs broader consulting practice
• Understanding of Australian regulatory context (AASB, APRA, etc.)
• Client testimonials and case studies

Step 3: Request Proposals

Ask shortlisted consultants to propose approach, timeline, team, and cost. Evaluate on:

• Understanding of your business: Do they demonstrate understanding of your industry, business model, material issues?
• Approach quality: Is their methodology robust? Do they involve stakeholders? Do they integrate strategy with implementation?
• Team quality: Who will do the work? Are they experienced? Will senior people be involved?
• Value for money: Is pricing competitive? What’s included? Are there hidden costs?
• Chemistry: Do you trust this team? Can they communicate clearly?

Cheapest isn’t always best. A better consultant might cost more but deliver higher quality and greater value.

Step 4: Interview Final Candidates

Meet with proposed team leads. Ask:

• What’s your experience in our industry?
• How would you approach our specific challenges?
• How do you ensure stakeholder engagement is authentic, not performative?
• How do you transition from consulting to in-house capability?
• What does success look like to you?
• How will you work with our internal team?

Step 5: Contract and Engagement

Clarify before you contract:

• Scope of work (what’s in scope, what’s out)
• Timeline and key milestones
• Cost structure (fixed fee vs time and materials; inclusions/exclusions)
• Deliverables (what you’ll receive)
• Your team’s responsibilities
• Communication and escalation
• Intellectual property ownership (your organisation should own strategy and IP)
• Confidentiality and conflicts of interest

Cost Considerations

Typical Costs

• Materiality assessment: $40-100k
• Full ESG strategy development: $80-200k
• Sustainability reporting and AASB S1/S2 support: $50-150k
• Climate risk and scenario analysis: $40-100k
• Supply chain ESG assessment: $50-150k (depending on supply chain complexity)
• Board training and governance design: $20-50k

Costs vary by consultant type (Big 4 more expensive than niche specialists), scope, complexity, and your geography.

ROI Considerations

ESG consulting investment typically delivers ROI through:

• Risk avoidance: Identifying and mitigating risks prevents costly disruptions, regulatory fines, or reputation damage.
• Operational efficiency: Better understanding of environmental and social impacts often reveals cost savings (energy, waste, water reduction).
• Strategic advantage: Early movers on ESG often gain market position and investor confidence.
• Compliance: Avoiding AASB S1/S2 or APRA breaches prevents regulatory exposure.
• Capability building: Internal team capability built during consulting engagement reduces future costs.

Many companies recover ESG consulting costs within 2-3 years through operational improvements and avoided risks.

Frequently Asked Questions

Should we hire consultants for implementation or just strategy?

Strategy ideally involves consultants—they bring external expertise and credibility. Implementation should primarily be internal. Some organisations hire consultants to design systems (governance, data, reporting), then internal teams operate them. This builds capability while ensuring quality system design.

How long does typical ESG strategy engagement take?

3-6 months is typical for strategy development. Materiality assessment alone takes 2-3 months. Full strategy with implementation roadmap might take 5-6 months. Tight timelines (AASB compliance) can be met with more intensive engagement.

What should we do to prepare for consultant engagement?

Designate an internal project lead. Gather relevant data (financial, operational, supply chain info). Secure board and executive commitment. Be transparent about challenges and constraints. The better your internal engagement, the better consultant value.

How do we transition from consultant support to in-house management?

Build internal capability during engagement—involve your team in workshops, analysis, and decision-making, not just receiving outputs. Consider hiring an internal ESG leader (Chief Sustainability Officer or equivalent) to take over once consultant engagement ends. Some organisations maintain ongoing engagement with consultants for complex areas (climate modelling, annual assurance) while managing day-to-day internally.

Can external consultants assess our ESG performance?

Yes. Many consultants provide independent ESG audits or benchmarking against peers. This can help you understand competitive position. Be aware that consultants who helped you develop strategy might be conflicted assessing performance. Independent third parties sometimes provide more credible external assessment.

How does hiring a consultant relate to building ESG strategy overall?

Consultants are tools to accelerate and improve strategy development. They’re not a substitute for board commitment, internal ownership, and organisational change. See our complete ESG strategy building guide for the full framework.

Moving Forward

Whether you hire ESG consultants depends on your internal capability, bandwidth, timeline, and budget. A hybrid approach—external strategy guidance with internal implementation—works well for many organisations. Choose consultants with demonstrated expertise in your industry and Australian context. Use consultants to accelerate strategy development and build internal capability, then transition to in-house management.

The goal is effective ESG strategy, not consultant dependence. Choose partners who help you build capability, not create ongoing reliance.