About us

Specialists in accounting and tax services

Who are we?

We are a firm with more than 25 years of experience in the provision of professional services in tax, fiscal and accounting auditing.

At Big Group we generate solutions to guarantee the creation of long-term value, sustainability and trust, focused on a deep understanding of your business and industry, we support you to be more productive, profitable and competitive through innovation processes, technological tools and professional teams.

In Colombia we have presence in Bogota, Medellin, Cali and Barranquilla. We generate solutions to ensure the creation of long-term value, sustainability and trust, focused on a deep understanding of your business and industry, we support you to be more productive, profitable and competitive through innovation processes, technological tools and teams of professionals.

Corporate Values

  • Professionalism
  • Honesty
  • Responsibility
  • Commitment
  • Security
  • Sense of belonging
  • Respect


In 2025 we will be a sustainable accounting firm recognized for our professional accounting, tax and information assurance services, which meets the expectations of our clients through the excellence, trust and confidence of our highly qualified team of professionals. We will be committed to social and environmental responsibility.


To provide professional services with the highest quality standards, which allow us to be the best ally of our clients in order to create long-term value, sustainability and trust.


Our professionals

Ricardo Rayo

Managing Partner

Public accountant from Universidad Javeriana with a master's degree in taxation from Universidad de los Andes, with more than 15 years of experience.
During his experience Ricardo has worked as a teacher at the Universidad Javeriana and Sergio Arboleda in the area of taxation, he has participated in the edition and updating of the ICA and property tax manual Bogotá - Legis.

Additionally, he has worked as Audit Manager in different public accounting firms participating in projects of Fiscal Review and Tax Advisory in Laboratorios Genfar, Federación Nacional de Cultivadores de Palma de aceite (Fedepalma), Finamerica S.A., Schlumberger Grupo, Estrella petrolera de Colombia S.A.S., Intersa S.A., Corporación universitaria Juan Ciudad, Transportes de Colombia S.A.S., Intersa S.A., Corporación universitaria Juan Ciudad, Transportes del norte S.A., Ibope Colombia S.A.S., Logitech Mobile S.A.S., Grupo Bolivariano S.A., Peláez Hermanos S.A., Biotoscana Farma S.A. Since 2015, Ricardo serves as Partner of the tax line, in charge of assignments related to tax advice, tax planning, management of refunds and compensations among other specialized services.

"Teamwork multiplies results."

Hernando Rayo

BPO Partner

Certified Public Accountant from Universidad Javeriana. Certified in IFRS -NIF and NIA with more than 30 years of experience.

Knowledge of Accounting Standards generally accepted and used by the most prestigious national and foreign companies. Professor in several universities in Colombia. Expert in Taxation, Costs for Administration, business organization, incorporation and liquidation of companies.

With his experience he has provided tangible solutions to companies in different economic sectors. Hernando has been a professor at the Pontificia Universidad Javeriana and has given several seminars at the Bogotá Chamber of Commerce.

"Timeliness, quality, accountability, compliance with standards and customer satisfaction, is our goal."

Angie Useche

Assurance Partner

Public accountant from Universidad Politécnico Grancolombiano, specialist in tax auditing from Universidad Javeriana. She has more than 10 years of experience in auditing and has participated in works that include internal control, external audit, previously agreed procedures, review assignments, productivity evaluation and control of administrative and financial procedures for entities such as Axxecol S.A, Bioanálisis farmacéutico, Fundación Neme, Refrimarket, Pecom, INIF, D-Local, Educentros among others.

Since 2015 Angie works as a Partner of Information Assurance where she manages more than 50 clients related to the service of Fiscal Review, Advisory, and Audits of previously agreed.

"Talent wins games, but teamwork and intelligence win championships."

Diego Ruiz

Senior Assurance

Diego is a CPA from the Universidad Autónoma de Colombia. He has participated in seminars on income for legal entities, income for individuals and NIAS. He has more than 8 years of experience in the accounting, tax and tax auditing fields. She has participated in multiple audit engagements in different types of companies performing work that includes external audit, tax audit, internal control review and evaluation under national standards, she has also participated in analysis of different tax returns both national and district according to current standards.

Among his main clients are: AVS Colombia S.A.S., Dlocal Colombia S.A.S., Grupo Ago S.A.S., Refrimarket Colombia S.A.S., Sign Supply S.A., Sociedad de Gestión Grupo Tw Solar Colombia S.A.S. and Unitech S.A. Sucursal Colombia.

Jessica Rodríguez

Senior BPO & Tax

Public accountant from Corporación Universitaria Minuto de Dios, with a diploma in finance, international financial reporting standards and tax updates.
She has more than 7 years of experience in the accounting and tax auditing sector. During his experience he has participated in the process of migration and implementation of accounting, control and foreign trade software, performing the proper management in different areas of the airport cargo sector in one of the most recognized companies for its relevant trajectory in the Ground & Cargo Handling SYC, Taescol Ltda.

His professionalism in supporting the implementation of processes and procedures contributed to guide the growth of the service provision of the financial area in the Serrezuela Country Club, as well as focused on the regulatory planning of cost management as an integral part of its business management.

She has coordinated different payroll control audits in the framework of compliance with the procedures established in the registration and accounting of social security in the company Jardines de Paz, attending control processes by the control entities such as the UGPP. Her leadership in the control, management and handling of information systems in the organizations has allowed to increase the efficiency of the processes exercising an excellent management in customer service.

Sandra Velásquez

Assurance Staff

Sandra is a Certified Public Accountant graduated from the University of Cundinamarca, she has completed diploma courses on the Social Security System in Colombia and International Financial Reporting Standards, she has more than 3 years of experience in the accounting field and in external auditing and statutory auditing. She is currently working as a statutory auditor for companies in different economic sectors.

Alex Piracon

BPO & Tax Staff

Alex is a Certified Public Accountant from the University of Santo Tomas, his experience of more than 3 years focuses on having a high degree of analysis and development of skills in internal control, managing different information systems and supporting the accounting and financial interpretation for decision making. His fundamental ability is to promote excellent communication and results in teamwork.

William Pinzón

Senior Assurance

Wiliiam is a business administrator from Universidad Autónoma de Occidente and a public accountant from Fundación Universitaria del Área Andina. He has more than 8 years of experience as a financial advisor to renowned companies in different sectors of the economy. He has completed accounting, financial and tax refresher courses.

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