William is originally from Cologne (Köln), Germany. He studied Informationswirtschaft at TH Köln and earned a PhD in Informationswissenschaften from the University of Düsseldorf. For more than ten years, he served as CEO of infospeed GmbH, where he led SEO campaigns for major corporations including Deutsche Telekom, Ford, PwC, and Edeka. After relocating to San Diego, he founded Blue Media Marketing, Inc., an SEO agency also headquartered in San Diego.
Dr. William Sen is the former CEO of infospeed GmbH, the earliest SEO agency in Germany, where he began working in search engine optimization at the very beginning of the field and has been active since 2001. He also authored the first German Wikipedia entry for ‘Suchmaschinenoptimierung’, reflecting his pioneering role in SEO.
After relocating to San Diego, he expanded his work to the U.S. market, where his company Blue Media Marketing, Inc. developed into a leading SEO agency in Southern California. He has also taught SEO at his alma mater, TH Köln, the largest university of applied sciences in Europe.
In addition, he served as editor of the first Social Media Magazine in Germany, organized the very first Social Media Conference in Germany for seven consecutive years, and initiated the first state accredited university course ‘Social Media Manager (TH)’ at TH Köln.
William is also the Organizer of the SD Germans and GABA Meetups in San Diego, and he is the YouTuber LebenUSA.
As an SEO specialist and software developer, I focus on increasing your website’s visibility and generating qualified leads using the full range of modern digital tools.
With the rise of AI-driven platforms, we have developed advanced AI visibility strategies that consistently deliver measurable results for our clients.
Over the course of my career, I have worked with more than 500 organizations, including enterprise, mid-size, and small businesses.
My objective is straightforward: to help your business attract more customers and grow.
Blue Media, a San Diego SEO agency co-founded by Dr. William Sen, traces its origins to 1996, when he began offering web development and online marketing services to media, legal, medical, and construction clients.
During the late 1990s IT boom, he contributed to multiple software and marketing companies and served major brands including BMW, Mercedes, Roomba, and Raytheon.
In 2001, he introduced SEO, then called Web Positioning, placing the company among early global pioneers. By 2003, Procter & Gamble became a major client. A 2005 merger with a social listening provider helped the company rank among top market leaders, serving corporations such as Bayer, Ford, Microsoft, and DHL.
After 2015 Dr. Sen founded Blue Media Marketing, Inc. in San Diego.
