Independent ▴ Trusted ▴ Transaction Specialists

The GreenMount Advisory Team

Experienced tax experts in transactions of all sizes

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Ryan Davis

Founder, Executive Chairman

Ryan Davis is an internationally trusted tax advisor with over 20 years’ Big-4 experience advising global and domestic Private Equity, Debt, Sovereign Wealth & Pension Funds; as well as Corporates and High Net Worth / Family Offices on M&A transactions and tax structuring. He has been the lead-Partner on some of Australia and New Zealand's largest private equity transactions both on the buy and the sell-side.

Prior to establishing GreenMount in September 2018, Ryan was a senior Partner and Asia-Pacific Private Equity Tax Leader for Ernst & Young (EY).  Ryan started his career in NZ at EY and then moved to PwC Sydney as a member of their international and M&A tax practice. He then joined KPMG as a Partner in 2012 to become their Oceania Private Equity Tax Leader.

Born and educated in New Zealand Ryan gained a Bachelor of Commerce in Accounting (Otago University) and is professionally qualified as a Chartered Accountant in Australia and New Zealand. Ryan is passionate about life, his family, his indigenous heritage, business, surfing, skiing and fishing.

Ryan is based in Sydney, Australia but travels regularly to New Zealand and across the Asia-Pacific.

Contact Details

+61 (0) 428 977 492 


Lachlan Maguire


Lachlan Maguire was a former Director in the EY Transaction Tax team, with over 12 years’ experience in tax structuring and financing advice to domestic and international investors.

Lachlan’s breadth of experience included focuses on diversified corporate M&A, energy, infrastructure, real estate and private equity. Lachlan also has significant experience with US clients, expanded through his time at EY in New York City where he advised US clients on Australian tax elements of their global transactions, including US fund structuring into offshore investments.

Lachlan has been a Chartered Accountant for nearly 10 years and holds a public practising certificate with CAANZ. He was born in Queensland and educated at The University of Queensland, where he received a Bachelor of Commerce, majoring in Finance and Accounting. He was listed on the Dean’s Honour Roll and was also awarded the KPMG Tax Law Prize.

Contact Details

+61 (0) 412 187 844


Olivia-James McKeown

Junior Analyst

Olivia-James McKeown is a Junior Analyst at GreenMount, and was the first intern at GreenMount. She is currently studying a double degree at The University of Sydney of Bachelor of Commerce/Advanced Studies, majoring in International Business and International Relations. Olivia-James was Dux of her graduate year in 2017, and currently has a Distinction Average in her Bachelor of Commerce. Olivia-James is an inaugural Dalyell Scholar of The University of Sydney. She is also the Vice-President of Network of Women, a Corporate Networking society for Women at the University of Sydney, and Director of Marketing and Social Media for the University of Sydney Business School Society. She recently completed a Women in Leadership consulting program at McKinsey Consulting Group.

Olivia-James was born in New Zealand and educated in Sydney, Australia. Her interests include Current Affairs, Entrepreneurship, FinTech, Art, Travelling and Theatre.

Contact Details

+61 (0) 481 502 793 

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Chris Monsted


Chris Monsted has over 14 years’ experience in providing tax, accounting and financial advice and has spent the last 8+ years specialising in advising global and Australian-based private equity funds, their investee companies, as well as large corporations on a range of taxation matters relating to restructuring, M&A and refinancing transactions. Prior to joining GreenMount, Chris worked with Ryan at both EY and KPMG.

Chris also has extensive experience in advising corporates, wealthy individuals, early-stage investors, and founders of successful businesses / start-ups on structuring, asset-protection and divestment related matters, including family trusts, self-managed superannuation funds and the Small-business CGT Concessions.

Born in Sydney, Chris holds an MBA from INSEEC, France; a Master of Commerce (Commercial Law) and a double-Bachelors degree in Applied Finance and Commerce (Accounting) from Macquarie University, Sydney. 

Outside of the office, Chris keeps active playing Premier League football for Old Barker FC in Sydney, golf at Killara GC, and exercising his dog ‘Whisky’.

Contact Details

+61 (0) 418 412 308