Alliott Global Alliance (‘AGA’), one of the largest and fastest-growing global multidisciplinary alliances with 215 member firms in 95 countries, can now provide clients with accounting and tax services in Thailand through Top 25 firm Administration Outsourcing Co., Ltd (‘Administration Outsourcing’) in Bangkok.

Administration Outsourcing was founded in 2006 by Chairman and Managing Director, Peter Upperton after working in numerous high-profile CFO, directorships, and auditing roles. Peter has extensive skills in developing practical accounting solutions, corporate turnarounds and cash flow improvements.

Thanks to Alliott Global Alliance for sponsoring this post.

John Casella, the firm’s CEO, has over 30 years’ experience working in tax, accounting and corporate consulting for a wide range of clients across South-East Asia and North America, including for Big Four firms, and holds active CPA designations both in USA and Canada. John has been working in Thailand and the wider region since the 1997 financial crisis, in corporate advisory, debt restructuring as well as operational, managerial and corporate consultancy for a wide range of clients across South-East Asia.

Steve Wilson, International Tax Adviser, has worked in South-East Asia for the last 12 years of his +35-year career that has included extensive Big Four experience working across Europe and serving as Head of International Tax at a large Russian Oil Company. Steve is a Chartered Tax Adviser, a member of the UK Association of Corporate Treasurers and holds the Advanced Diploma in International Taxation.

The talented and experienced team, which has been working together for over two decades, provides management accounting, tax compliance and advisory, international tax plans, TP and DTA advice, structuring cross border investments and transactions, payroll and HR issues, corporate secretarial and compliance services, to clients mainly in the business consultancy, technology, trading, advertising / branding, and financial management sectors.

Business at the firm is conducted in the English and Thai languages.

Peter comments:

“We are delighted and honoured to have been selected as AGA’s sole representative accounting and tax member in Thailand and, as we grow, we are excited to utilise the strong AGA brand and market ourselves to foreign owned companies operating in Thailand and to overseas firms looking to set up new entities in the region that will gain the benefit of our well-established local experience and international outlook.

“By meeting with our fellow members, sharing best practice and attending AGA events throughout the year, starting with the Asia Pacific Regional Conference being held in Bangkok on 21-23 April 2023, we look forward to forging important trusted relationships with those in the region and world-wide which will open up many opportunities for mutual collaboration and business development.”

Alliott Global Alliance’s CEO, Giles Brake adds:

“We are really pleased to welcome Administration Outsourcing to the alliance as our sole accounting member in Thailand. With ‘Big Four’ experience and substantial know-how in assisting foreign companies to expand into and out of Thailand, the firm is ideally placed to provide the level of expertise and personal service required by the clients of our member firms within SE Asia and across the globe. With the alliance’s international resources behind them, Administration Outsourcing can now position themselves as a true global solutions provider. A warm welcome to everyone at the firm.”

Administration Outsourcing’s appointment gives AGA dual representation in Thailand with GPS Legal Limited providing complementary legal services required by companies and entrepreneurs setting up and expanding their business interests in the region. Through affiliation with AGA, local independent law and accounting firms can offer clients global reach and access to an extensive range of professional services that enables them to compete head on with the larger international firms in their jurisdictions.

Across the Asia Pacific region, AGA has member firms in China, Hong Kong, Bangladesh, Singapore, Indonesia, Malaysia, India, Australia, Papua New Guinea, New Zealand, Japan, South Korea, Nepal, Pakistan, Thailand, Taiwan, the Philippines, and Vietnam.

About Administration Outsourcing Co.,Ltd:

As Alliott Global Alliance’s accounting representative in Thailand, Administration Outsourcing is a specialist accounting company, based in Bangkok that is focused on providing the best possible advice and compliance in bookkeeping, management accounting, tax, and legal services. The firm currently prepares management accounting for clients’ business operations in Thailand, Singapore, Australia, USA, United Kingdom, British Virgin Islands, Cayman Islands, Marshall Islands, Seychelles, and Hong Kong.

Thanks to Alliott Global Alliance for sponsoring this post.

Posted by Alliott Global Alliance

Alliott Global Alliance ( is one of the world’s largest international alliances of independent accounting, law and specialist firms. Alliott Global Alliance members provide an ever expanding global presence offering fellow members and their clients legal expertise across a broad range of practice areas in commercial centers throughout the world. Alliott Global Alliance offers independent firms the opportunity to extend nationally, regionally and globally with their clients through access to other firms of like-minded professionals, committed to providing the highest standard of service. With more than 200 member firms in some 95 countries, the group meets the local and cross-border needs of its members and their clients. Membership allows firms to both retain and attract business through the ability to connect with likeminded professionals in other jurisdictions. Members exchange, benchmark and share know-how and best practice information on both a technical and practice management level. More information on Alliott Global Alliance can be found on our website

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