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TGS Osillo is an accountancy and advisory firm based in Kampala, Uganda. TGS Osillo delivers client centric audit, tax and business consulting services to businesses, governments and development agencies. The firm was formed in 2008 after Mr. Osillo Justin Keith; CPA left employment to start out an accountancy practice. Unlike most accountancy firms in Uganda where the partners are engaged in employment in industry, Justin set a difference by concentrating on managing and building the firm from day one. This commitment and passion has contributed greatly to the fast growth that the firm has experienced ever since its formation. TGS Osillo has grown to a position of prominence and is recognized as one of the top 10 audit firms in Uganda.
Osillo & Co (now TGS Osillo) was formed in August 2008 as a sole practice. The firm experienced significant growth and in April 2011, Mr. Owora Fredricks was admitted as a partner and the firm became a partnership. TGS Osillo is the Ugandan member of TGS Global Network.
TGS Osillo as a duly registered firm in Uganda conforms to the professional pronouncements and standards in Uganda and beyond. We complement the professional standards with proven best practice in professional services delivery.

We comply with the International Standards on Auditing (ISAs) and the reporting framework of our clients such as International Financial Reporting Standards (IFRSs), International Financial Reporting Standard for Small and Medium Sized Entities (IFRS for SMEs), International Public Sector Accounting Standards (IPSASs) and other reporting frameworks for special purpose financial reporting.

Our audit process is fully computerized following the deployment of Draftworx Audit and Work papers solution. This software enable us produce complete and accurate Work papers and lead schedules in the audit process. We also apply the RAC audit methodology.
TGS Osillo takes quality very seriously in every aspect of our work. Our quality control manual (which is strictly adhered to) guides the acceptance, performance and reporting on all client work. In addition to compliance to the International Standard on Quality Control (ISQC1), we comply with all ethical and other guidelines issued by ICPAU.