Flagship director Andy Berry is leading the account and reports to Protiviti UK and Ireland PR co-ordinator Alex Jones and managing director Mike Adlem.
Protiviti is preparing for an autumn launch that will involve a series of events designed to get the attention of multinational businesses and business and financial media.
The combined budget for the marcoms launch will run into six figures with
PR spend understood to be between £50,000 and £100,000 for the year.
As part of the campaign, the firm is also planning to publish a study into corporate fraud.
Originally owned by Arthur Andersen in the US, Protiviti is now owned by recruitment consultancy Robert Half International.
Protiviti specialises in advising corporations on internal audit and business and technology risk management.
Flagship fought off Financial Dynamics, Citigate Dewe Rogerson and Lansons Communications for the business.