[3] Prior to this, the American information technology group Hewlett-Packard (HP) had acquired the computer engineering services arm of EDS (Electronic Data Systems).

Courtecuisse expects this trend to continue (notably in the U.S., where the firm has just purchased an office space in Manhattan's Financial District), and is looking to the west coast for future expansion.

In September 2016, Sia announced the acquisition of Molten Group, a consulting firm based in London and Houston, TX, with a specialization in transformation and the oil and gas industry.

[14][15][16][17][18][19] Happydemics (December 2020),[20] Greenly (July 2021)[21] and METAV.RS (September 2022)[22] In May 2018, Sia acquired the French digital marketing agency, FOVE.

Based in Seattle and Denver, establishing the firm's presence on the US West Coast and increasing its activities in the Tech, Healthcare, Utilities, and Airline industries.

[25] In May 2019, Sia announced the acquisition of the Gartland and Mellina Group ("GMG"), a management consulting firm in the US focused on financial services.

[26] In July 2019, the group launched its affiliate program with the goal of accelerating brand deployment in Latin America, Sub-Saharan Africa, and Asia.

[29][30] In December 2020, Sia expands its presence in Canada with the acquisition of RG Advisory, a Toronto-based firm specializing in financial services.

[31] In April 2021, Sia expanded its activities in France, exceeding 1,000 employees, with the acquisition of USIDE, a consulting firm specializing in corporate behavior and quality of work life.

[39] At the end of 2022, Sia Partners acquired Latham BioPharm Group, enabling consulting capabilities in global life sciences, biotechnology, and pharmaceuticals.