The full WZ credential system.
WZ certifications are recognized across loss prevention, HR, federal, and law enforcement. Whether you're earning a Level I attendance certificate or pursuing the CFI designation, this is where the system fits together.
WZ Credential Stack
- Level I Certificate
- Level II Certificate
- Specialty / CEU Credit
- CFI Preparation
- CFI Designation (IAI)
- 3-Year Renewal Cycle
One Method, Many Credentials
Every WZ credential is rooted in the same non-confrontational interview method. The difference between them is the audience and the depth, not the philosophy.
Rapport-First
Every WZ credential teaches the same rapport-led opening — across every audience.
Ethical & Defensible
Methods that hold up to legal, HR, and external review.
Stackable
Level I → Level II → CFI Prep → CFI. Build the stack that fits your career.
Globally Recognized
WZ-trained and CFI-credentialed investigators work on every continent.
Verifiable
Forty years of records, signed verification letters on request.
Renewable
The CFI renews on a 3-year cycle; WZ provides the CEU options.
The WZ Credential Path
Choose Your Path
Private sector, HR/ER, law enforcement, or federal — pick the WZ certificate that matches your role.
Earn the Certificate
Attend Level I, Level II, or a specialty WZ program and earn your certificate of attendance.
Optionally Pursue CFI
Three years of experience + the CFI Prep workshop + the IAI exam = the CFI credential.
Verify When Needed
Employers, auditors, and credentialing bodies can confirm any WZ training history through our records team.
Renew on a 3-Year Cycle
CFIs renew every three years through IAI with continuing education credits.
The Four Main WZ Credentials
Pick the WZ credential that matches your investigative role.
Certified Forensic Interviewer (CFI)
The global standard for ethical, evidence-based investigative interviewing. Issued by IAI, prepped by WZ.
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Level I Investigative Interviewing
The flagship WZ certificate of attendance — the foundation most investigators start with.
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Level I Workplace Investigations
The WZ method adapted for HR, employee relations, and people-leader interview work.
ExploreCriminal Level I
Evidence-based criminal interview method for sworn investigators and detectives.
ExploreWZ-Certified Investigators At
Testimonials
“WZ-trained shows up on every resume worth reading. The credential is consistent, recognized, and earned.”
“We hire CFIs first. WZ trains the way we want our investigators to behave — non-confrontational, rapport-first, defensible.”
“Standardizing on WZ certificates across our regions changed our investigative outcomes more than any policy update.”
Ready to Get WZ Certified?
Browse the catalog or talk to WZ about the right credential for your role.