Board Advisory Specialists

Advisors, Associates & Affiliates

Focused Expertise

Geoff Nunn - Board advisor & governance specialist

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Geoff is a specialist in corporate governance, board structures, organisation behaviour and transition and board and executive remuneration.  He has consulted extensively to the private sector.  Organisations include those from manufacturing, utilities, engineering, finance, insurance, automotive, resources and petroleum industries.  He has worked extensively with the government sector.

Over the past 25 years he has specialised in working with utility based organisations and has extensive knowledge of the sector and this issues it confronts.

Geoff has worked with over 100 Boards since 1993 on issues ranging from CEO succession and performance, governance standards, board effectiveness, charter drafting, director recruitment, executive and board remuneration.

Before entering consulting in 1993, Geoff spent twenty years in a range of senior human resource and remuneration management roles with the National Australia Bank, Public Transport Corporation of Victoria and RioTinto (CRA).

Geoff holds undergraduate qualifications in Accounting, a Graduate Diploma and a Master’s Degree in Organisation Behaviour from Swinburne University.  He is a Fellow of the Australian Human Resources Institute and a Graduate Member of the Australian Institute of Company Directors. 

Di Percy - Board Advisor & transition specialist

Di Percy is Australia’s leading board dynamics and transition specialist.   She is Director of her own board advisory and transition practice Diana Percy & Associates. 

Di has worked with the Boards and Executive Teams of companies such as Atlassian, Challenger, News Limited, Jemena, Pacific Hydro and others.  This has included work in the utilities, finance, legal, engineering, health, medical, creative and government sectors.

She served  on a number of boards, including the Committee for Economic Development Australia (CEDA) for five years, and chaired the Daylesford Dharma School from 2015 to 2017.  She is the founder of the internationally recognised Organisation Development Australia (ODA).

Di holds a Master’s Degree in Organisation Dynamics from RMIT and is a Member of the Australian Institute of Company Directors.

Di works closely with Geoff Nunn and Associates on board and governance related matters.

Ian Siebert - Senior Associate

Ian Siebert has worked as a management and organisational development consultant as well as an educator for over twenty years. His consulting expertise is in the areas of remuneration, leadership, organisation and management development and competency modelling. He worked as a Senior Consultant with the HayGroup for five years and has a twenty-five year association with Geoff Nunn & Associates.

Ian also provides individualised career development coaching services and has associations with several providers of higher education qualifications at the applied and practical end of the spectrum. His MBA Facilitation includes Leadership, Change and development of Consulting Capabilities for managers.

He has extensive consulting experience in the service, manufacturing, finance, consumer products and higher education sectors. His exposure includes large and small organisations in both the public and private sectors as well as in for purpose social enterprises.

He currently works with the Australian Institute of Management and Swinburne Professional in the design and delivery of contemporary leadership and change management programs and was formerly the Director of Postgraduate Programs for AIM Victoria and Tasmania. He holds undergraduate qualifications in Higher Education and Economics and an MBA from Monash University.


INSIGHTPAY (formerly National Remuneration Centre)

InsightPay (and its predecessor the NRC) has been conducting remuneration surveys and offering a range of services across Australia for over 30 years. In December 2016, its management transitioned to a new team. Our new team has a significant background in Human Resources management practice and our aim is to refresh, develop and expand the strong suite of products and services.

Over time it is the plan to develop new products, strengthen existing products and to provide additional consultancy support. One of our first tasks is to engage with clients and other stakeholders to seek their input as we begin the task of refreshing and strengthening the InsightPay.


HRascent is a specialist in remuneration, incentive design and remuneration frameworks and policy. With extensive experience as a niche service provider in an area which is both complex and at times highly regulated, we have built a stable team of savvy, commercial, collaborative professionals with extensive experience and targeted expertise across complex organisational systems.

HRascent is committed to working with organisations to align people systems with remuneration strategies, company performance, and overarching business objectives, while ensuring organisations are compliant with relevant government and regulatory requirements.

Rushall Consulting

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We work on the dynamics that affect engagement and collaboration. We guide people to escape the habits that no longer serve them well and  release them from their inner critic. We provide new insights into leading and influencing. We help people and groups to deploy targeted and effective behaviours built around adaptive leadership.

Each and every day Rushall Consulting is trusted by many of the Asia Pacific's most successful companies, and its government agencies and health services to assist them to expand their adaptive capacity and their leadership effectiveness.