[6] In 1981 he re-located to Antwerp, Belgium, and became a partner and CEO at S. Muller & Sons, a leading Antwerp-based diamond manufacturer and distributor.
[7] Mostovicz was among the pioneers who found the way to polish the now popular Hearts-and-Arrow cut as early as 1985 turning his factory into one of the very best in the industry.
[citation needed] Working under the supervision of Prof. Leslie de Chernatony, a brand expert, allowed S. Muller & Sons to turn this opportunity into a success where others failed.
The understanding of the critical stage of the retail marketing led Mostovicz to conclude as early as 1994 that the diamond industry was crumbling.
Upon viewing the grim future and since he could not find sufficient answers within the diamond industry Mostovicz turned to higher education, completing his MBA and PhD.
[9] Mostovicz describes the two worldview types on his blog, Janus Thinking:[10] "The typical Theta (Θ) personality seeks affiliation and control as an ultimate life purpose.