Holger Aulenbach, born in Germany on the North Sea island Borkum. After graduating the International School in Brussels, trained merchant in wholesale and foreign trade from 1982 to 1985 at Bayerische Motoren Werke BMW. Than military service, integrated deployment at Supreme Headquarters Allied Powers Europe in Belgium (S.H.A.P.E.). 1988 Business researcher at a subsidiary of Dun & Bradstreet New York, jeweler in London.

Entrepreneur since 1991, owner, board member and CEO of several companies all over the world. Diamantaire and jeweler with direct trading on the Antwerp diamond exchanges. At this point, Mr. Aulenbach would like to express his thanks to Rudolf J. Förster and Kai-Uwe Heinrich of RJF Diamanthandels AG for the wonderful time they worked together. In 1993 he became executive Director of Koh-I-Noor Diamanthandel, later Koh-I-Noor Diamonds AG and DiamantNet AG with approximately 60 employees in Lübeck and Hamburg alone. Unfair powers, exorbitant taxes and levies forced the company to cut jobs in 1997. Personal meetings with legends such as Sir Gabi Tolkowsky from De Beers complemented his recognition and competence in the diamond trade. A jewelry store on the 'Neuer Jungfernstieg' in Hamburg had been opened. Last but not least it was the only store in Germany with the honour, privilege and pleasure to present Argyle Diamonds from Australia. Extraordinary circumstances led to a change and at the beginning of the millennium, he was called into the entertainment business without ever losing sight to the splendor of nature in the form of diamonds.

In collaboration with Bossmedia Sweden, a software development company that was well-known around the turn of the millennium, he launched the first German-language online casino in 1998. The diamond company continued to operate in parallel until 2000, then it was dissolved. Long stays in North, South and Central America followed, where he contributed to the development of the first interactive poker rooms and, among other, ran PresidentPoker together with David Sklansky, Author, triple WSOP bracelet winner and founder of the original TruePoker in Costa Rica. Professional poker player for several years, living in America and Panama when the Trump Ocean Club was built, then involved in the stock exchange and trading business from 2011 with an Aktiengesellschaft from Switzerland. From 2013 independent trader and later establised the President Enterprises LLC combining the stock exchange and entertainment business in 2017. He operaded MAMFX and BrokersCasino until 2024.

Sir Gabi Tolkowsky passed away on May 28th 2023, which prompted Mr. Aulenbach to pay tribute to his legacy and resume his activities as a Diamantaire. Termination of trading, online casino and marketing activities in 2024. Interest in continuing the online casino business waned primarily because, unlike in the past, these are no longer actual online casinos but merely marketing companies. The online casinos of today are, in reality, operated by so-called game providers.

Most recently President and Chairman of President Enterprises LLC, USA. This company is currently being dissolved and its substance is on sale at brokerscasino.com. He is  also the owner of KEWE web agency. He was and is always reachable for his valued customers, business partners, shareholders and friends. Among many leisure activities he enjoys golf, motor boat yachting, flying, fishing, poker, riding horses as well as cruising on his HD-Breakout he named BEAUTY. The unique international, entrepreneurial life experience ultimately put him into a state of wakefulness, whereupon he is set of recounting these experiences in a book.