[1][2] He is the founder of Adlyn Holdings and Madlyn Cazalis Group, a conglomerate based in Cameroon that operates across Central and West Africa.

[9][10] Ngan began his career as an associate at Findercod,[11] an investment banking firm in Paris, where he focused on long-term financing and private equity.

[21] On April 25, 2014, Ngan was invited to Libreville by Gabon's President Ali Bongo Ondimba,[22][23] where he joined workshops with government officials and private sector leaders to discuss social and economic issues and explore ways to promote entrepreneurship among young Africans.

"[26][28] In September 2014, Madlyn Cazalis founder won "The Get in the Ring – Investment Battle" Competition in Cameroon and was listed as one of "The 10 Most Promising Startups of Africa" by BiD Network and the Erasmus Centre for Entrepreneurship.

[30] In October 2014, Ngan was a temporary lecturer for ISCOM a leading French communication school in Paris where he taught a Business Model class.

In June 2015, ALN Foundation purchased a 5% equity stake in Goldsky Partners SARL, the parent company of Madlyn Cazalis at a half-million-dollar valuation.

[59] Institut Choiseul for International Politics and Geoeconomics, in its first edition of The Choiseul 100 Africa: Economic Leaders for Tomorrow, which was released in September 2014, listed Christian Ngan among "growing business leaders, successful entrepreneurs, investors, etc…" and "embody the dynamism and renewal of a whole continent and carry the hopes of an entire generation."

The list "Identifies and ranks the young African leaders of 40 years old and under, who will play a major role in the development of Africa in the near future.