We believe strong audit quality builds confidence, accountability and trust. Sovren Advisory was established to help audit firms navigate the increasing expectations of ASQM 1 through practical advice, technical expertise and independent review.
Our Experience
Quality Management
- ASQM 1 & ASQM 2
- SOQM design and implementation
- Monitoring & evaluation
- Remedial action
- Independent quality reviews (Cold reviews)
- Hot files review
- Engagement Quality Reviews (EQRs)
- AML/CTF rapid assessments
Financial and Performance Audits, Assurance and Support
- Audit and Assurance methodology design and implementation
- Technical papers (accounting and auditing)
- Technical consultation (accounting, auditing, and assurance)
- Sustainability reporting and assurance support
- Procurement Fraud Audit methodology development
- Technical Audit and Assurance Advisory (Financial and Performance Audit and Sustainability reporting and assurance)
Financial and Other Statutory Reporting
- International and Australian Auditing Standards
- International and Australian Standards on Assurance Engagements
- Australian Accounting Standards
- IFRS
Governance
- Independence/ Conflict of Interest
- Code of Ethics (including gifts and hospitality)
- Internal controls
- Internal Audit Support and Advisory (including audit committee support)
- Risk management
Industry Background
The partners have provided audit, governance and quality advisory services across a broad range of sectors, including:
- Whole of government financial reports
- National, State, and Local Government agencies
- Public sector audit offices
- Listed entities
- Universities and other tertiary institutions
- Mining and resources
- Energy
- Water utilities
- Transport
- Professional services firms
- Not-for-profit organisations
Meet the Partners
Sandra Labuschagne CA(SA), CA ANZ

Sandra Labuschagne works with audit firms to strengthen quality, governance and accountability, drawing on more than two decades of experience in technical audit, audit quality and senior public sector leadership. As a former Deputy Auditor General of Western Australia, she understands both the demands placed on audit organisations and the expectations of those responsible for overseeing quality, governance and public accountability. Sandra brings that perspective to help firms navigate complex quality challenges, understand the underlying causes of issues and build practical systems that strengthen the quality, consistency and sustainability of their work. Click here for more on Sandra’s experience.
Wian Oosthuizen CA(SA), CA ANZ

Wian Oosthuizen works with audit firms, public audit institutions and governance-focused organisations to strengthen audit quality, technical capability and systems of quality management, drawing on more than 20 years of experience in audit methodology, ASQM implementation and governance. As former Assistant Auditor General, Technical and Audit Support at the Office of the Auditor General for Western Australia, he understands both the technical demands of a modern audit methodology and the governance disciplines, independence, conflicts of interest, and gifts and hospitality, that sit behind it. Wian brings that perspective to help firms design and implement practical quality management systems, strengthen governance frameworks, and build the financial audit methodologies, quality reviews and technical advisory capability needed to meet rising standards. Click here for more on Wian’s experience.
Professional Standards
Sovren’s Partners are Chartered Accountants (CA (SA) and CA ANZ) committed to independence, ethical practice and professional excellence. The firm voluntary operates a System of Quality Management founded on ISQM 1/ ASQM 1 principles.
