Her journey in the fashion industry has earned her prestigious international recognition. She showcased her designs at Torino Fashion Week in Italy and later made waves at London Fashion Week. On the local scene, she has served as a moderator for the Platinum Fashion Festival (PFF) for several years. Mercia has also been a designer for leading characters in popular Mzansi Magic telenovelas such as The River and The Queen. Her designs have adorned prominent South African figures, including Sindi Dlathu, Somizi Mhlongo, and Makhadzi.

Her entrepreneurial journey was documented on SABC’s Making Moves, where her vision for using fashion as a tool for empowerment was highlighted. In 2018, she broke into the mainstream fashion retail market by signing a significant contract with Young Designers Emporium (YDE), a division of the Truworths Group. This allowed her brand to be stocked in major retail spaces such as Sandton City, Menlyn Mall, and Canal Walk.

Beyond fashion, Mercia is actively involved in leadership and development. She has served on several boards under the Department of Sports, Arts and Culture, including as Deputy Chairperson of the Provincial Arts and Culture Council, a Board Member of the Mmabana Foundation, and a Board Member of the Sun Goddess Foundation—all of which focus on nurturing young talent and creating opportunities for creatives.

Mercia founded Deepmoon, a clothing and design company that became the cornerstone of a growing business empire. Through its success, she expanded into various industries, establishing entities such as Deepmoon Properties and Deepmoon Skills Development Hub, an NQF Level 1 to Level 4 SETA-accredited initiative. The hub is committed to empowering youth, women, and people with disabilities by providing trade skills, mentorship, and essential resources to help them become employable and start their own businesses.