Board of Directors

Executive Team

All Locations


Hong Kong

Cayman Islands


Isle of Man



United States

Byram Johnston OAM
Non-Executive Chairman

Byram co-founded Mainstream and serves as its Non-Executive Chairman.

Before establishing Mainstream, Byram served as the managing partner at Arthur Anderson, Sydney and has a strong advisory and consulting background. He is a member of the ASIC Audit Committee and is also involved in a number of other corporate and government boards and committees.

Byram is a Fellow of the Institute of Chartered Accountants and holds a Bachelor of Economics Degree from Sydney University. He was awarded an Order of Australia in 2004 for services to the accounting, medical research and motor sport industries.

Martin Smith, Chief Executive Officer
Chief Executive Officer

Martin is a founder, director and the CEO of Mainstream. Based in Sydney, he is responsible for global operations, execution of strategy and key client relationships. Prior to co-founding Mainstream in 2006, Martin worked for FinancialBPO, The IQ Business Group and Arthur Andersen Business Consulting designing, implementing and managing outsourcing/shared services arrangements across a range of industries including financial services, government, health, real estate, logistics and information technology.

Martin gained his skills with Coles Myer as the Financial Controller of Liquorland in the 1990’s. Martin is RG146 compliant and holds a Bachelor of Business, a Masters of Commerce and is a Certified Practising Accountant.

John Plummer
Non-Executive Director

John joined the Mainstream board in 2015. John’s professional experience includes more than 30 years of strategy, outsourcing, investment and business leadership experience.

John has held executive and non-executive roles with Chandler Macleod Ltd, retiring as Deputy Chairman, and has previously served on the board of listed investment companies and industry super funds. He sits on the boards of several private companies in recruitment, technology and investment markets. John is a past National President and life member of the Recruitment and Consulting Services Association and a Fellow of the Governance Institute of Australia.

John holds a Bachelor of Commerce (Marketing) from the University of New South Wales and a Masters of Business Administration from Macquarie University.

JoAnna Fisher
Non-Executive Director

JoAnna joined the Mainstream Group Board in 2018. JoAnna has more than 20 years of senior management experience in funds management, capital markets and wholesale banking both in Australia and overseas. Her commercial experience includes serving as General Manager of Corporate Bank at Commonwealth Bank and Senior Vice President at Bankers Trust in Japan, New York and Sydney.

JoAnna is currently Non-Executive Chair and Director of Morphic Ethical Equity Fund. She has also sat on the boards and committees of a number of investment management and not for profit organisations.

JoAnna holds a Bachelor of Economics (Accounting) and Bachelor of Arts (Asian Studies) from the Australian National University and is a graduated member of the Australian Institute of Company Directors.

Debbie Last
Non-Executive Director

Debbie joined the Board in 2019. Debbie has over 25 years of experience in the financial services sector. She has held senior executive positions including CFO of NAB Asset Management and director of a number of related entities. Debbie was also a Partner of PwC Sydney and KPMG London.

Debbie holds a Bachelor of Commerce from the University of Melbourne and is a Chartered Accountant.

Nick Happell
Chief Executive Officer, Asia-Pacific

Nick is the CEO of Mainstream Fund Services, Asia Pacific, responsible for building relationships with our key clients and ensuring their expectations are met. Nick has previously worked in the investment administration and Client Services team. Nick holds a Bachelor of Business from the University of Technology, Sydney.

Andy Harrison
Chief Executive Officer, Australia

Andy Harrison is the CEO of Mainstream Fund Services in Australia. Andy has over 16 years of experience in outsourcing, custody, fund accounting, registry, investment operations and middle and back office solutions for fund managers. Prior to joining Mainstream, Andy was CEO of Link Fund Solutions (formerly White Outsourcing). From March 2009 to December 2010, Andy was a Non-Executive Director of HUB24 (ASX:HUB). Prior to working in Australia, Andy worked in the UK with Jupiter Asset Management. He holds a Bachelor of Arts (Hons) in Business from the University of Wolverhampton.

Stacey Kelly
Chief Financial Officer

Stacey Kelly is the Chief Financial Officer (CFO) for Mainstream Group Holdings Limited. Stacey has over 15 years of experience in business partnering, project management, financial control, forecasting and management. Prior to joining Mainstream, Stacey held roles with Macquarie Telecom Group, Macquarie Group and HSBC Bank.

Stacey holds a Graduate Certificate in Applied Finance and Investment from the Securities Institute of Australia, a Bachelor of Arts majoring in Mathematics and Psychology and a Graduate Diploma in Accounting from Macquarie University and is a Certified Practising Accountant.

Head of Client Services, Australia

Nick joined Mainstream Fund Services in 2012 to oversee Mainstream’s managed account offering. He is now responsible for developing partnerships with both new and existing business as Head of Client Services. Prior to working at Mainstream Nick worked as an academic at Macquarie University’s Faculty of Business and Economics. Nick holds a Bachelor of Economics from Macquarie University and a Masters of Economics from the University of Sydney.

Jenny Elhassan
Head of Transitions and Global Operating Model

Jenny is responsible for project co-ordination and delivery of client onboarding for the fund administration business and the Group’s global operations.

Jenny has extensive experience in business process design and delivery, operations and transitions across the funds management sector.

Jenny first joined Mainstream in 2005 and has also worked for BNP Paribas, Perpetual Corporate Trust, State Street and St George Bank.

Michael Garrett
Head of Unit Registry

Michael Garrett leads Mainstream’s Australian Unit Registry team, including Investor Services, Processing and Quality Assurance, with a focus on service delivery for our clients.

Michael Garrett has more than 20 years of experience as an operations leader, including transfer agency, trade and derivative operations, client reporting, fund administration, reconciliations, onboarding and performance. Michael was previously Head of Australian Business Operations for 12 years at Blackrock Investment Management, and has also held senior operations roles with BT Financial Group, RBC Global Services and Perpetual Fund Services.

Aimee Birch
Head of Risk and Compliance

Aimee is responsible for overseeing Mainstream Fund Services’ risk and compliance function.

Aimee has worked for Mainstream since 2006 in various roles, primarily across Mainstream’s registry function where she was responsible for applications, redemptions, distributions, adviser commissions and client reporting.

Aimee holds a Bachelor of Economics and Social Science and is PS146 compliant.

Alicia Gill
Head of Marketing and Company Secretary

Alicia is responsible for the Group’s marketing, communications, investor relations and company secretary function.

With a strong background in marketing, management and human resources, Alicia oversees Mainstream’s brand, investor and client communications as well as providing company secretary duties to the Board.

Alicia has over 15 years of financial services experience gained from working for both boutiques and large global institutions such as Nomura Securities and Macquarie Bank.

Alicia holds a Bachelor of Business from the University of Technology, Sydney and a Diploma  of Investor Relations from the Australasian Investor Relations Association.

Tony Hawker
Head of Technology

Tony is the Head of Technology for Mainstream as well as Senior Network Engineer for Mainstream Digital Services. Based in Melbourne he is responsible for overseeing IT operations for the Mainstream group.

Tony has over 15 years’ experience in the information technology industry, with a focus on IT security. Prior to joining Mainstream Tony worked in the professional services and local council sector in a variety of IT and networking roles.

He holds a Diploma in Network Engineering along with a raft of industry accreditations.

Rachel Parris
Head of Human Resources

Rachel has more than 18 years of progressive leadership, human resources, project leadership and culture and engagement experience. In her previous role, Rachel was the Human Resources Director for 11 years with an ASX listed Company. As the Head of HR, Rachel is responsible for overseeing the day-to-day operations of the Human Resource function globally, establishing and driving the people strategy and acts as a key advisor to the senior leaders across the company. Rachel hold a Human Resources and Industrial Relations degree from the University of Western Sydney.

Clay Sullivan
Head of Middle Office Services

Clay is Head of Middle Office Services. Based in Hong Kong with Middle Office teams in Sydney and Hong Kong, Clay has extensive experience in fund manager research, evaluation, performance, compliance and contract management.

Clay has been responsible for Middle Office Services at Mainstream Fund Services for over ten years. Prior to that he worked on international client performance and transitions at Russell / Mellon in Sydney, fund manager research and high net worth clients at ING in the Fund Manager Research Team and heavy electrical service delivery in the power industry in New Zealand. He is a Fellow of FINSIA, holds a Graduate Diploma in Applied Finance, Masters and Honours Degrees in Commerce & Finance, and Electrical Engineering qualifications.

Amber Lo
Head of Fund Services, Country Manager Hong Kong

As Head of Fund Services and Country Manager Amber heads up fund services and business operations for Mainstream Fund Services in Hong Kong. With more than 10 years of experience working in fund administration, Amber previously worked for Mainstream from 2008-2010. She has also worked for Euroclear Bank, Hang Seng Bank and Alliance Bernstein in a variety of client management, business strategy and operational roles.

Amber holds a Bachelor of Business from Monash University.

John McCann
Chief Executive Officer, Europe and Cayman

John has over 30 years of experience within global financial services, working in various domiciles such as London, Jersey, Cayman and Dublin. He founded Trinity Fund Administration Limited in 1994 before joining Mainstream in 2017. John is a current member of the Institute of Directors, Ireland, an associate member of the Chartered Institute of Bankers (“CIB”), in Canterbury, England, as well a member of a number of other industry groups and committees. He is a sought after speaker and participates in numerous national and international associations (such as Enterprise Ireland Funds Services and Cluster Group, The Financial Services Governance Risk and Compliance Technology Centre (GRCTC) and AIMA), each committed to a greater understanding of the industry and the practical application of regulatory, legislative and commercial change.

John graduated with a B.A. in Economics and Sociology from the University of Manitoba, Canada. He also holds a Trustee Diploma from the CIB.

Ian Dungate
Country Manager, Isle of Man

Ian is Country Manager of Mainstream Fund Services, Isle of Man. He began his career in fund administration over 25 years ago at CIBC and Bank of America in the Cayman Islands and Abacus Financial Services in the Isle of Man. In 2005 he moved to Anglo Irish Fund Services and formed part of the management team which undertook a management buyout of the Company, then named Galileo Fund Services Limited, in 2007, before becoming part of the Mainstream group in 2016.

Ian graduated with an honours degree in Accounting and Finance from the University of the West of England and is a Fellow of the Institute of Chartered Accountants in England and Wales (FCA).

Natalya Pace
Country Manager, Malta

Natalya is Mainstream Fund Services’ country manager in Malta. Natalya has over 15 years’ experience in financial services operations and fund accounting. She has previously worked for Apex Fund Services, Société Générale, Credit Bank of Moscow and Sberbank of Russia.

Natalya holds a degree in Banking and Finance (Honours) from University of Malta, and Masters degree in Economics from the Financial University under the Government of the Russian Federation. Additionally, she holds an Advanced Certificate in Fund Administration.

She is also a member of the Association of Chartered Certified Accountants and the Malta Institute of Accountants.

John Davis
Country Manager, Singapore

John joined Mainstream Fund Services as a graduate in 2008 and has held a variety of fund services roles including portfolio valuation, unit pricing and performance measurement. He is currently Mainstream Fund Services’ Singapore country manager. John holds an Engineering degree and a Master of Business Administration majoring in finance.

Denise DePaolo
Chief Executive Officer, Americas

Denise DePaola is CEO of Mainstream’s US operations. Denise has over 20 years of experience in public accounting and the alternative investment / financial services arena, with a particular emphasis on fund administration and business development. Denise has been licensed by the State of New York as a Certified Public Accountant (CPA). Denise has also been recognized as a thought leader, game changer and executive of the year by the hedge fund administration and consulting industry. She received a BA in Accounting and Information Systems from CUNY Queens College, NY, attended Fairleigh Dickinson University, NJ and Wroxton College, Oxfordshire, England. Denise is an active board member of the Dying to Live foundation.

Jay Maher
Chief Executive Officer, Private Equity, Venture Capital and Real Estate

Jay is a recognised leader in private equity administration with more than 24 years of industry experience. He is responsible for Mainstream’s private equity, venture capital and real estate fund administration business globally.

Prior to joining Mainstream, Jay built SS&C’s Private Equity Services Group from 2004 to 2015. Most recently he founded boutique private equity administrator Paddock Fund Services.

Jay earned a Bachelor of Science in Accounting from Rowan University.

James Wheatley
Senior Vice President, Private Equity, Venture Capital, Real Estate

James has over 15 years of fund accounting experience, with a particular focus on private equity, direct lending and real assets.

James began his fund accounting career with Saints Venture Capital before joining Babcock & Brown’s private equity group (who later spun out to form SteelRiver Infrastructure Partners). James then helped build out SS&C’s Los Angeles based PE team before joining Ultra Capital, a newly established project finance and asset management company specializing in renewable energy and sustainable infrastructure as the VP of Finance. He joined Mainstream in 2018 as part of the Group’s expansion into closed-end fund services.

James has a Bachelor of Science in Accounting and Finance from Northeastern University, and a Master of Science in Accounting from Golden Gate University.