Stephan Spencer is an author of The Art of SEO published in October 2009 by O'Reilly and co-authored by Eric Enge, Rand Fishkin and Jessie Stricchiola.

Stephan is the founder of Netconcepts. Netconcepts started out as a web design and marketing agency, but over time morphed into a leading SEO firm. Stephan, and Netconcepts, had been heavy into the science of SEO since 1999.

Netconcepts was acquired in January 2010 by paid and organic search software/services agency Covario. Covario is one of those rare companies to have made it onto the Inc 500 list two years in a row -- in 2009 and again in 2010.

Stephan is the inventor of the automated pay-for-performance natural search technology platform GravityStream, now re-branded as Organic Search Optimizer.

He is a Senior Contributor to Practical Ecommerce and to MarketingProfs.com, and a columnist for Search Engine Land and Multichannel Merchant. He's also contributed to DM News, Catalog Age, Catalog Success, Building Online Business, Unlimited, and NZ Marketing magazine, among others.

Stephan is a frequent conference speaker on SEO and other online marketing topics for the Direct Marketing Association (DMA), American Marketing Association (AMA), Shop.org, Internet Retailer, SMX, IncisiveMedia (Search Engine Strategies), O'Reilly/TechWeb, PubCon, ECMOD, IQPC and IIR. His hundreds of speaking gigs have taken him around the globe -- everywhere from Berlin, London, Toronto, Santiago, and Auckland, to New York, Chicago, San Francisco, Los Angeles, and places in between.

Stephan is an avid blogger. He blogs at Stephan Spencer's Scatterings, Natural Search Blog, Business Blog Consulting, Changes For Good, and Google, I Suggest... He's also been a contributor for the following group blogs: Searchlight (part of the CNET Blog Network), Shop.org Blog, and MarketingProfs Daily Fix.

Stephan is on the advisory board of CrowdGather.

He holds an M.S. in Biochemistry from the University of Wisconsin-Madison.