Marc John M. Guiab

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Japan Desk

Services

We put our clients in the centre of the conversation. Our experts across various service lines deliver quality work and value-added services tailored to your...

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Audit & Assurance

We help you manage your fiscal responsibilities with prudence and foresight.

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Annual and short period audit
We perform audit engagements in accordance with the Philippine Standards on Auditing (PSA), as required by required by national legislation or other regulations of agencies such as the Bureau of Internal Revenue (BIR), Securities and Exchange Commission (SEC), Bangko Sentral ng Pilipinas (BSP), Insurance Commission (IC), Cooperative Development Authority (CDA), etc.
Review engagement
We provide a limited or moderate level of assurance that financial statements are free from material misstatements, in accordance with the Philippine Standard on Review Engagements (PSRE).
Financial statements compilation
We help in the preparation of financial statements of clients in accordance with Philippine Standard on Related Services (PSRS) 4410.
Security offerings services
We provide assurance services for our clients’ debt and equity security offerings. These include audits or reviews of financial statements, examination of prospectuses, and issuance of comfort letters as required.
Agreed-upon procedures
We perform agreed-upon procedures in accordance with applicable professional standards, delivering factual findings reports tailored to the specific needs of our clients and relevant third parties. Our services include asset and inventory count observations, financial statement translations, and assistance with regulatory applications such as capital stock increases and debt-to-equity conversions.
Other related services
We help our clients stay ahead of the evolving complexities in the accounting landscape. Our offerings include training programs, transition and implementation planning, and impact assessments related to newly adopted accounting standards, such as Philippine Financial Reporting Standards (PFRS Accounting Standards) and other relevant frameworks.

Tax Advisory & Compliance

We help you identify the opportunities and pitfalls that can significantly affect your bottom line.

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Tax advisory
With our knowledge of tax laws and regulations, we help safeguard the substantive and procedural rights of taxpayers and prevent unwarranted assessments.
Tax compliance
We aim to minimise the impact of taxation, enabling you to maximise your potential savings and to expand your business.
Transfer pricing
We provide comprehensive Transfer Pricing (TP) solutions suited to the needs of the client.
Corporate services
For clients who want to do business in the Philippines, we help set up the business and assist in determining the appropriate and tax-efficient operating business or investment vehicle.
Tax education and advocacy
We offer seminars and trainings on tax-related developments and special issues of interest to taxpayers.

Advisory Services

We believe there is an optimal solution to every business challenge. Using our Firm's breadth and depth of specialized expertise, we work with you to find...

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Business risk services
Our business risk services cover a wide range of solutions that assist you in identifying, addressing and monitoring risks in your business. Such solutions include external quality assessments of your Internal Audit activities' conformance with standards as well as evaluating its readiness for such an external assessment.
Business consulting services
Our business consulting services are aimed at addressing concerns in your operations, processes and systems. Using our extensive knowledge of various industries, we can take a close look at your business processes as we create solutions that can help you mitigate risks to meet your objectives, promote efficiency, and beef up controls.
Transaction services
Transaction advisory includes all of our services specifically directed at assisting in investment, mergers and acquisitions, and financing transactions between and among businesses, lenders and governments. Such services include, among others, due diligence reviews, project feasibility studies, financial modelling, model audits and valuation.
Forensic advisory
Our forensic advisory services include assessing your vulnerability to fraud and identifying fraud risk factors, and recommending practical solutions to eliminate the gaps. We also provide investigative services to detect and quantify fraud and corruption and to trace assets and data that may have been lost in a fraud event.
Cyber advisory
Our focus is to help you identify and manage the cyber risks you might be facing within your organization. Our team can provide detailed, actionable insight that incorporates industry best practices and standards to strengthen your cybersecurity position and help you make informed decisions.
ProActive Hotline
Providing support in preventing and detecting fraud by creating a safe and secure whistleblowing system to promote integrity and honesty in the organisation.
Sustainability
At P&A Grant Thornton sustainability is at the core of our mission. We are committed to fostering a healthier planet through innovative practices that reduce our environmental footprint, promote social responsibility, and ensure economic viability for future generations.

Business Process Solutions

We provide solid, first-rate support for your key accounting and administrative activities.

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Accounting Services
At P&A Grant Thornton, we handle accounting services for several companies from a wide range of industries. Our approach is highly flexible. You may opt to outsource all your accounting functions, or pass on to us choice activities.
Payroll Services
We streamline payroll operations with secure, technology-driven solutions that enhance accuracy, ensure compliance, and free organisations to focus on strategic priorities.
Human Capital Outsourcing Services
We deliver highly trainable and experienced accounting professionals matched to client requirements, covering center and attrition management, and special projects.

Japan Desk

We connect Japanese businesses with trusted local expertise.

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Careers

FAQs

Careers

With our unique culture and opportunities, our organisation is a place where you can grow. Wherever you are in your career, we help you to make a difference...

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Why Grant Thornton is a great place to work

We value each of the 50,000 people in our member firms equally and appreciate every contribution across Grant Thornton.

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Our values
Grant Thornton prides itself on being a values-driven organisation and we have more than 38,500 people in over 130 countries who are passionately committed to these values.
Global culture
Our people tell us that our global culture is one of the biggest attractions of a career with Grant Thornton.
Learning & development
At Grant Thornton we believe learning and development opportunities allow you to perform at your best every day. And when you are at your best, we are the best at serving our clients
Global talent mobility
One of the biggest attractions of a career with Grant Thornton is the opportunity to work on cross-border projects all over the world.
Diversity
Diversity helps us meet the demands of a changing world. We value the fact that our people come from all walks of life and that this diversity of experience and perspective makes our organisation stronger as a result.
In the community
Many Grant Thornton member firms provide a range of inspirational and generous services to the communities they serve.
Behind the Numbers: People of P&A Grant Thornton
Discover the inspiring stories of the individuals who make up our vibrant community. From seasoned veterans to fresh faces, the Purple Tribe is a diverse team united by a shared passion.

Opportunities

If you wish to develop your talents to the fullest and build a fulfilling career, join P&A Grant Thornton, where you will be part of a dynamic...

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Fresh Graduates
Fresh Graduates
Students
Whether you are starting your career as a graduate or school leaver, P&A Grant Thornton can give you a flying start. We are ambitious. Take the fact that we’re the world’s fastest-growing global accountancy organisation. For our people, that means access to a global organisation and the chance to collaborate with more than 40,000 colleagues around the world. And potentially work in different countries and experience other cultures.
Experienced hires
P&A Grant Thornton offers something you can't find anywhere else. This is the opportunity to develop your ideas and thinking while having your efforts recognised from day one. We value the skills and knowledge you bring to Grant Thornton as an experienced professional and look forward to supporting you as you grow you career with our organisation.

FAQs

If you would like to join Grant Thornton, you may have a few questions about our organisation, how we do business, our culture and our global opportunities....

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Industries

By ensuring that our clients are matched with professionals most familiar with their industry, P&A Grant Thornton aims to provide a seamless onboarding...

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Consumer products

Emerging markets and shifting consumer demand are creating new opportunities in food and beverage, with business leaders investing in new products, markets,...

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Education

Our vision is to help learning institutions and business organisations go beyond and create powerful learning cultures through technology integration,...

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Energy and natural resources

Energy markets worldwide are undergoing major changes. P&A Grant Thornton can help you understand and navigate ensuing challenges and make sure you have the...

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Financial services

Optimism is slowly returning to the global economy, but the financial services industry needs to regain the trust of public and private bodies. To truly go...

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Not for profit

Across the globe, not for profit organisations are increasingly expected to deliver more, while at the same time facing cuts in government funding and...

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Outsourcing

The outsourcing industry is one of the fastest growing sectors in the Philippines. Growth in the industry is at an annual average rate of 20%. The industry is...

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Public sector

Across the globe, countries are moving towards leaner, more commercial, locally focused, and responsive government and public sectors. At P&A Grant Thornton,...

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Real estate and construction

Opportunity and optimism have emerged within the retail estate and construction industry. At P&A Grant Thornton, it’s our goal to help you benefit from these...

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Technology, media and communications

At P&A Grant Thornton, we’ll work with you to capitalise on all opportunities, manage the inherent risks the industry has to offer, and provide relevant...

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Travel, tourism and leisure

Dynamic businesses need to move with speed and purpose if they want to capitalise on opportunities in hospitality and tourism. At P&A Grant Thornton, we know...

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Retail industry

With operational cost, price competition, and currency volatility, pressure on profits continues to pile on retailers. Advancements in e-commerce are also...

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As Director and Head of the Accounting Business Unit of P&A Grant Thornton, Marc provides day-to-day leadership and management that mirrors the mission and core values of the Firm.

Marc started his career as an internal auditor of a wine distribution company. Now in the finance and accounting outsourcing industry for more than a decade, he has handled various outsourced accounting engagements with companies in different industries such as retail consumer products, oil and gas, information and communications technology and services.

Marc has attended various in-house and external trainings (accounting, BIR and other agencies’ rules and regulations updates, and technical trainings). He also participated in the Emerging Leaders Program (ELP) in Bangkok, Thailand conducted by Grant Thornton International Ltd.

Marc has a degree in Bachelor of Science in Accountancy at Divine World College of Legaspi. He has completed the Management Principles Course at John Clements Consultants Inc. He has also finished programmes, Chief Finance Officer Leadership Development Program and Partners Leadership Development Program from the Asian Insititute of Management.

Memberships

Philippine Institute of Certified Public Accountants (PICPA)
Association of CPAs in Commerce and Industry (ACPACI)

Professional Certification

Certified Public Accountant
Certified Management Accountant
Certified Lean Six Sigma

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Marc John M. Guiab

Director and Practice Unit Head, Business Process Solutions (Outsourced Accounting Services)

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