---
title: "Trauma and Crime Scene Technician (TCST) — definition"
description: "The IICRC's individual technician certification built on the S540 standard. It certifies a person, not a company, and it is voluntary."
canonical: https://biohazardcrown.shop/glossary/tcst/
language: en-US
risk_tier: R1
last_reviewed: 2026-08-18
---
# Trauma and Crime Scene Technician (TCST)

The IICRC's individual technician certification built on the S540 standard. It certifies a person, not a company, and it is voluntary.

## What kind of thing this is

Trauma and Crime Scene Technician (TCST) is a credential in this field. This definition comes from a standards body or an industry institution rather than from government. That makes it authoritative about practice and silent about legal obligation — a distinction worth keeping when a company cites it.

## Where you will meet it

You will meet this on a company website, usually as a badge and rarely with a name attached to it. The question that turns it into information is who holds it — a credential belongs to a person or to a company, and the two are not interchangeable.

## Why the wording matters

This site defines terms in under forty words wherever it can, and attaches the practical consequence rather than leaving it implied. A definition that tells you what something is, without telling you what follows from it, is trivia at a moment when nobody has room for trivia.

Show every source used on this page

- Tier 2 [ANSI/IICRC S540 Standard for Trauma and Crime Scene Cleanup](https://iicrc.org/) — IICRC, accessed 2026-08-17

- Tier 1 [Bloodborne Pathogens, 29 CFR 1910.1030](https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1030) — Occupational Safety and Health Administration, accessed 2026-08-17

Written by [Biohazard Crown editorial team](https://biohazardcrown.shop/authors/editorial-team/)

Last reviewed: 2026-08-18

## Related questions

- [Full glossary](https://biohazardcrown.shop/glossary/)

- [More on this](https://biohazardcrown.shop/certifications/)

- [Who pays for cleanup](https://biohazardcrown.shop/who-pays/)

- [How to check a company](https://biohazardcrown.shop/hiring/how-to-vet-a-company/)