Ptech Inc. was a Quincy, Massachusetts-based provider of business process modeling software that was closed down in late 2003 as a consequence to the media frenzy following the consented search on December 5, 2002 by federal authorities under the auspices of Operation Green Quest. The search was related to the relationship of the company to businessman Yasin al-Qadi, a multi-millionaire from Jeddah, trained as an architect in Chicago, IL. He is the son-in-law of Sheikh Ahmed Salah Jamjoom, a former Saudi Arabian government minister with close ties to the Saudi royal family.
Describing itself as a "provider of enterprise architecture, business modeling, analysis and integration software solutions," the privately held corporation was founded in 1994, and known for its technology, which was based on a unique implementation of neural net and semantic technologies. Ptech was recognized as one New England Technology's "Fast 50" by Deloitte Touche Tohmatsu in 2001. For four years in row (from 2000 to 2003), Ptech was also recognized, for their velocity of innovation in the knowledge economy, as one of the hundred companies that matters in the world of IT and Business  with the major names in Technology companies such as Microsoft, IBM, HP and Oracle Corporation.
The CEO of Ptech Oussama Ziade appeared on different television shows in the USA and has been featured on the cover of several magazines. The company was once part of UML Partners, the consortium that was convened to develop standards for UML, the Unified Modeling Language.
Ptech was thrust into the national spotlight following a consented search by U.S. law enforcement officials at Ptech’s headquarters on December 5, 2002, in connection with Operation Green Quest. The consented search was misrepresented by national news media as a raid. This unfavorable national publicity resulted in the eventual closing of the company in late 2003. Former Ptech employees described Ptech as a company which encouraged diversity in the workplace that respected their cultures and traditions; they attributed the media frenzy that engulfed Ptech to the politically-charged atmosphere generated by the 9/11 terrorist attack.
The Ptech investigation followed sanctions placed on Yasin al-Qadi, a former Ptech investor, after he was placed on a list of alleged terrorists. On October 12, 2001, the U.S. Department of Treasury's Office of Foreign Assets Control (OFAC) ordered the assets of Yasin al-Qadi in the United States to be frozen  and Federal law prohibited financial transactions involving his property. The European Union also applied sanctions to Qadi.
On July 15, 2009, the FBI unsealed indictments against former Ptech CEO, President, and Board Chairman Oussama Ziade and former Ptech CFO Buford George Peterson. The indictments charged Ziade and Peterson with concealing Ptech's relationship with Qadi and dealing in his assets. Peterson was specifically charged with providing false information on a Small Business Administration loan application submitted in September 2002. The government had alleged that the omission of Sarmany as a Ptech shareholder on the Small Business Administration loan application was purposeful and criminal because one of Sarmany's shareholders was Kadi. The charge against Peterson was dismissed May 3, 2012.
Qadi's listing as a terrorist was later overturned by several European courts, and his name was removed from blacklists by Switzerland (2007), the European Union (2008 and 2010), and the United Kingdom (2008 and 2010).
On 13 September 2010, Yasin al-Qadi "succeeded in having dismissed in their entirety the civil claims brought against him in the United States on behalf of the families of the 9/11 victims."  On 5 October 2012, the UN Security Council committee monitoring sanctions against al-Qaeda granted Qadi's petition to be removed from its blacklist.
Ptech's roster of clients included several governmental agencies, including the United States Armed Forces, NATO, Congress, the Department of Energy, the Department of Justice, the Federal Bureau of Investigation, Customs, the FAA, the IRS, the Secret Service, and the White House. Despite the eventual 2009 indictment of PTech's CEO and CFO, as late as May 2004 they were still contracted by several federal agencies, including the White House.
Ptech had a security clearance to work on sensitive military projects dating to 1997.
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