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Senior Investigator – On-Call / As-Needed

Charles F Day & Associates LLCHybridWashington, District of ColumbiaPosted Aug 10, 2026

Compensation

Not listed

Type

Contractor

Location

Washington, District of Columbia

Posted

Aug 10, 2026

Requirements Summary

Candidates must have a minimum of 15 years of experience in complex investigations and be U.S. citizens capable of obtaining a Top Secret security clearance. Proficiency in investigative documentation and the ability to work both independently and collaboratively are essential.

Core Responsibilities

The Senior Investigator will support complex civil and criminal investigations by conducting research, interviews, and evidence analysis. They will also provide litigation support, coordinate with law enforcement agencies, and mentor government investigators.

Key Skills

Complex investigationsCriminal investigationsCivil investigationsEvidence analysisInterviewingInvestigative planningOpen-source researchLitigation supportIntelligence gatheringReport writingAffidavit preparationData analysisMentoringWhite-collar crime investigationFraud investigationFinancial crime investigation

Company Information

  • Industry: Business Consulting and Services
  • Company Size: 51-200 employees
  • Type: Privately Held
  • Specialties: Big Data, Modeling, Simulation, Analytics, Training, Doctrine, Project Management, Program Management, Management Consulting, Policy Development, Logistics Management, Weapons Systems Management, DIME/PmESII Modeling, Strategic Planning, DOTMILPF-P Analysis and Support, Agent Based Modeling and Simulation, Explainable AI solutions, Quantum Simulation & Modeling, Data Analytics, Mission Support Services, and Operational Support & Logistics

Full Job Description

CONTINGENT UPON CONTRACT AWARD Location: Washington, DC Metropolitan Area Schedule: On-Call / As-Needed; hours are not guaranteed Work Location: Primarily remote/contractor location with recurring availability to report to Washington, DC Security Requirement: Must be able to obtain and maintain a Top Secret security clearance U.S. Citizenship Required Position Summary CFDay is seeking highly experienced Senior Investigators to provide on-call, as-needed investigative support to a federal Office of Inspector General (OIG). This position is intended for experienced investigative professionals who can provide support when required based on Government investigative workload and case requirements. This is not a traditional full-time position, and a minimum number of hours is not guaranteed. The Senior Investigator will support complex civil and criminal investigations and may perform investigative planning, research, interviews, evidence review and analysis, investigative documentation, litigation support, intelligence-gathering activities, and coordination with federal and other law-enforcement organizations. Essential Duties and Responsibilities * Support the planning and execution of complex civil and criminal investigations. * Develop investigative approaches, theories, and evidence-collection strategies. * Conduct background investigations and open-source research involving individuals, businesses, organizations, and other investigative subjects. * Prepare for and conduct or support investigative interviews. * Review and analyze documentary and electronic evidence, including emails, communications, telephone records, internet information, bid documents, court filings, transcripts, recordings, and other evidence. * Prepare affidavits, interview reports, evidence summaries, investigative reports, and related case documentation. * Support sensitive investigations and intelligence-gathering activities when authorized. * Coordinate investigative activities with local, state, federal, and international law-enforcement organizations. * Support joint investigations with other Government agencies. * Provide litigation support, including evidence and discovery organization, investigative timelines, summary materials, witness preparation, hearings, depositions, grand jury proceedings, and trials. * Provide testimony when required and authorized. * Provide training, mentoring, and guidance to Government investigators regarding investigative techniques and practices. Required Qualifications * Minimum 15 years of experience conducting complex civil and/or criminal investigations. * U.S. citizenship. * Ability to obtain and maintain a Top Secret security clearance if required by the Government. * Ability to satisfy applicable Government background investigation and suitability requirements. * Demonstrated experience conducting complex investigations and developing appropriate investigative documentation. * Strong written and verbal communication skills. * Ability to work independently and collaboratively with Government investigators, attorneys, law-enforcement personnel, witnesses, and other stakeholders. * Ability to report to Washington, DC on a recurring basis as required. Preferred Qualifications Preference will be given to candidates possessing one or more of the following: * White-collar crime, fraud, financial crime, or similar investigative experience. * Prior federal law-enforcement investigative experience. * Prior Office of Inspector General investigative experience. * International criminal and/or civil investigative experience. * Intelligence-gathering experience, including developing and operating human sources. * Investigative data-analysis experience. * Experience training or mentoring investigators. * Active or recently held Top Secret security clearance. * Experience supporting federal litigation, grand jury proceedings, hearings, depositions, or trials. Work Schedule and Availability This position provides investigative services on an as-needed basis. Work assignments and hours will fluctuate based on Government requirements, investigative workload, and authorized tasking. There is no guarantee of a minimum number of hours. When assigned, personnel may be required to support activities during the Government's normal operating hours of Monday through Friday, 7:00 a.m. to 5:00 p.m. ET. Work is expected to be performed primarily remotely or at the contractor's facility; however, selected personnel must be able to report to DFC Headquarters in Washington, DC on a recurring basis as required. Equal Employment Opportunity Statement CFDay is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status, or any other characteristic protected by law. HUBZone Requirement This position is designated to support CFDay's HUBZone workforce requirements. Applicants must reside in a qualified HUBZone at the time of hire and maintain qualifying residency as required

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