---
title: "Appointment"
description: "CBRNe World provides those tasked with defending against CBRN and IED threats with the essential practical, scientific and political information. Access the current and previous issues of the magazine by registering as a member."
url: "https://cbrneworld.com/component/tags/tag/appointment"
date: "2026-07-30T21:51:31+00:00"
language: "en-GB"
---

Written on 13 July 2023.

##  [Mary Ellen Callahan Appointed Assistant Secretary of DHS CWMD as Gary Rasicot Moves to Coast Guard](https://cbrneworld.com/news/mary-ellen-callahan-appointed-assistant-secretary-of-dhs-cwmd-as-gary-rasicot-moves-to-coast-guard)

Ms. Mary Ellen Callahan has been appointed as the Assistant Secretary of the Department of Homeland Security’s Countering Weapons of Mass Destruction Office (CWMD).

Since September 2021, Ms. Callahan has served as Chief of Staff to Deputy Secretary John K. Tien at the Department of

...

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