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Press Release

Federal Grand Jury in San Antonio Indicts Former Air Force Employee, Ashburn, VA-Based Quantadyn Corporation, and Its Owner for Alleged Bribery and Government Contract Fraud Scheme

For Immediate Release
U.S. Attorney's Office, Western District of Texas

In San Antonio today, a federal judge unsealed a grand jury indictment charging a software engineering company called Quantadyn Corporation (Quantadyn); one of its owners, 59-year-old Herndon, VA, resident David Joseph Bolduc, Jr.; 53-year-old San Antonio resident Keith Alan Seguin, and 70-year-old Atlanta, GA, area resident Rubens Wilson Fiuza Lima for their roles in a bribery and government contract fraud scheme that spanned more than a decade and impacted contract awards worth hundreds of millions of dollars.

That announcement was made today by U.S. Attorney John F. Bash; Special Agent in Charge Jamie Willemin of the Government Services Administration—Office of the Inspector General (GSA-OIG), Greater Southwest and Rocky Mountain Investigations Division; Acting Special Agent in Charge Ruben Rosalez of the Internal Revenue Service-Criminal Investigation (IRS-CI), Houston Field Office; Special Agent in Charge Michael Mentavlos of the Defense Criminal Investigative Service (DCIS), Southwest Field Office; Special Agent in Charge Ray Rayos of the U.S. Army Criminal Investigation Command, Southwestern Fraud Field Office (USACID); and, Special Agent in Charge Blair Holmstrand of the Air Force Office of Special Investigations (AFOSI), Procurement Fraud Detachment 3 in San Antonio.

The indictment alleges the defendants carried out their contract fraud scheme from 2006 to 2018.  Specifically, Bolduc and Quantadyn paid more than $2.3 million in bribes to Seguin, a civilian employee of the 502 Trainer Development Squadron at Randolph Air Force Base in San Antonio, who was intimately involved in the government contract process.  In return, Seguin used his position to steer lucrative government contracts and sub-contracts to Quantadyn for aircraft and close-air-support training simulators.  The indictment further alleges that a portion of the bribe money paid to Seguin was laundered through Fiuza Lima’s business, Impex, Inc., for a ten percent fee. 

The three-count indictment charges Bolduc, Quantadyn, Seguin and Fiuza Lima with one count of conspiracy to defraud the U.S., one count of conspiracy to commit wire fraud, and one count of conspiracy to commit money laundering.  Upon conviction, Bolduc, Seguin and Fiuza Lima would face terms of imprisonment up to five years for conspiracy to defraud the U.S., up to 20 years for conspiracy to commit wire fraud, and up to 20 years for conspiracy to commit money laundering.  They would also face up to $1,000,000 in fines, and Quantadyn would face up to $1,500,000 in fines.  All of the defendants, would be ordered to pay restitution if convicted. 

“Allegations related to the exploitation of major federal procurement vehicles will always be an investigative priority.  The General Services Administration, Office of Inspector General, with our law enforcement partners, will continue to work diligently to protect the integrity of federal acquisitions, and other critical GSA programs that are designed to benefit its customers, including the warfighter,” stated GSA-OIG Special Agent in Charge Willemin, Greater Southwest and Rocky Mountain Investigations Division.

“Government contracts are designed to support the missions of the United States armed forces and are vital to our people. It is not a slush fund for thieves and fraudsters,” said IRS-CI Acting Special Agent in Charge Rosalez. “Those who illegally target our nation’s tax dollars for personal financial gain, as in this case, will be prosecuted and face the consequences of their actions.”

“DCIS, the Pentagon's investigative arm, will aggressively pursue allegations of fraud and corruption impacting the Department of Defense (DoD)," stated Michael Mentavlos, Special Agent in Charge, Southwest Field Office.  "Along with our Law Enforcement partners, DCIS is committed to safeguarding the integrity of taxpayer resources and will exhaust all appropriate criminal, civil, and administrative actions against those individuals that choose to defraud the government, DoD, and ultimately the taxpayer.”

“The collaboration between GSA-OIG, DCIS, U.S. Army CID, IRS-CI, AFOSI, and the U. S. Attorney’s Office of the Western District of Texas, has been significant and we are looking forward to seeing the final results of the hard work put forth by all agencies involved,” said AFOSI Special Agent in Charge Holmstrand.

Initial appearances are expected to occur this week before a U.S. Magistrate Judge in San Antonio (Seguin), Alexandria, VA (Bolduc), and Atlanta (Fiuza Lima).

The GSA-OIG, IRS-CI, DCIS, USACID, and AFOSI continue to investigate this case.  Individuals who may have information about this scheme or these defendants are asked to call the GSA-OIG fraud reporting hot line at (800) 424-5210, send an email to, or go online to and click on the “report FRAUD” link.  U. S. Attorney John Bash extends his appreciation to the U.S. Attorney’s Offices in the Eastern District of Virginia, Southern District of Ohio, and Northern District of Georgia for their valuable assistance.

Assistant U.S. Attorney William F. Lewis, Jr., Special Assistant U.S. Attorney Jay Porier, and Assistant U.S. Attorney Alan Buie are prosecuting this case on behalf of the government.

It is important to note that an indictment is merely a charge and should not be considered as evidence of guilt.  The defendants are presumed innocent until proven guilty in a court of law.



The year 2020 marks the 150th anniversary of the Department of Justice.  Learn more about the history of our agency at

Updated January 15, 2020

Financial Fraud