[8] Omrania was founded when architects Basem Al-Shihabi and Nabil Fanous collaborated to win an international design competition for the General Organization for Social Insurance (GOSI) Headquarters in Riyadh.

[9] In order to design and supervise the building's construction, they opened a small office that eventually grew into a large, multi-disciplinary practice of Omrania.

[10] In addition to designing numerous corporate headquarters, one of the firm's key early projects was the Tuwaiq Palace, a diplomatic club in Riyadh completed in 1985.

In collaboration with Buro Happold and Frei Otto, Omrania's design drew from vernacular architectural forms such as the tent and fortification, adapted to the desert climate.

[14] In 2018, Omrania's newly completed Grand Mosque in King Abdullah Financial District (KAFD) in Riyadh gained international recognition for its angular geometric forms and delicate treatment of light.

[23] The new headquarters campus of the Saudi Electricity Company (SEC) — one of the firm's current large-scale projects — includes vast rooftop solar arrays, computer-modeled shading systems and other passive design measures to reduce energy consumption.

The PIF Tower, designed with HOK to achieve LEED_NC Gold certification,[26] has an external layer of fins, gantries, and perforated panels that provide enhanced shade, minimize internal cooling loads, and reduce energy costs.