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A multi-faceted background for a comprehensive solution

Integrity One Solutions’ founding partners have backgrounds and expertise in four critical areas:

We have extensive experience working with businesses of all types and sizes, as well as with local, state and federal agencies.

The result is an exceedingly thorough, multi-disciplinary approach to investigations, risk management and risk mitigation.


Sarah Q. Nasir, CFE

Sarah Q. Nasir, CFE

Managing Partner/Co-Founder

With a background in investigation, criminal prosecution, and government regulation and oversight, Ms. Nasir is skilled at unraveling even the most complex forensic accounting, fraud, and regulatory compliance issues.

Her career began when she was asked to join the New York City Department of Investigation’s Investigative Audit Unit. Although one of the youngest members of this select unit, she quickly developed a reputation for combatting waste, fraud and corruption before she moved to the private sector to assist clients in commercial litigation and damages analysis.

As a forensic accountant, she successfully conducted investigations that cheated the City of New York, annually, out of millions of dollars. Additionally, Ms. Nasir co-led investigations into public corruption that resulted in convictions for bribing public officials, kickbacks and bid rigging. Ms. Nasir earned a reputation as a talented, tenacious and thorough investigator.

In 2007, Ms. Nasir returned to law enforcement and the public sector as Director of the Audit Unit at the New York City Business Integrity Commission. There, she led and guided the team that deciphered complex financial schemes designed to defraud the government, business partners or customers, seeking both justice and restitution. She has also collaborated with numerous federal, state and local law enforcement and tax authorities on cases of all sizes.

Professional Affiliations and Certifications
Association of Certified Fraud Examiners (Certified Fraud Examiner CFE)
Association of Inspectors General (Certified Inspector General Auditor)
Institute of Internal Auditors (Member)


Christopher J. Mahon, CFE

Christopher J. Mahon, CFE

Managing Partner/Co-Founder

As a graduate of the highly selective FBI National Academy, which admits fewer than 1% of all applicants, Mr. Mahon has a distinguished background that includes 30+ years of law enforcement, investigation and regulatory compliance responsibilities. He also has specialized training in white-collar crime, fraud and violent crime.

He began his career with the New Haven Police Department, where he investigated and supervised homicide investigations, sexual assaults, robberies and kidnappings, and was a long-standing member of the SWAT team.

After retiring as a sergeant, Mr. Mahon joined the New York City Business Integrity Commission (BIC) as a Supervisory Investigator. He quickly rose to become Deputy Commissioner of Investigations, leading the organization to new levels of professionalism and investigative excellence. He also managed and co-managed many high-profile investigations in partnership with the New York City Police Department, Federal Bureau of Investigation, New York City Department of Investigation, NYS Attorney General’s Organized Crime Task Force, Nassau and Suffolk Police Departments, U.S. Department of Labor-OIG, New Jersey State Police Cargo Theft Unit and Connecticut State Police.

In 2014, Mr. Mahon was promoted to Acting First Deputy Commissioner of the BIC, leading all day-to-day operations at the agency. With the selection of a new commissioner by Mayor Bill De Blasio, he returned to lead the Investigative Services Division before retiring from public service in 2017.

Professional Affiliations, Certifications and Training
Certified Fraud Examiner (CFE), Association of Certified Fraud Examiners
FBI National Academy, Class 249
International Association of Chiefs of Police (IACP)
WMD Tactical Operations Course Hazardous Materials Ops CFR 1910.120
FLETC Physical Security Training Program (PSTP)
Law Enforcement Response to WMD Incidents


Leadership Case Studies

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