HDMK

{{notability|Companies|date=October 2015}}

HDMK is an American strategic communication lobbying firm based in Washington, D.C., whose partners were originally four Republican communication professionals:{{cite magazine

|url=http://www.prweek.com/uk/news/article/756219/

|title=GOP comms vets join forces

|first=Ted

|last=McKenna

|magazine=PRWeek USA

|date=2007-10-24}}{{cite web

|url=https://www.politico.com/story/2007/10/suite-talk-new-shop-in-town-006480

|title=Suite Talk: New shop in town

|first=Aoiffe

|last=McCarthy

|publisher=Politico

|date=2007-10-22}} Terry Holt, Trent Duffy, Jim Morrell and Chad Kolton.

The group aided the Special Operations OPSEC Education Fund.{{cite news

|url=https://blogs.wsj.com/washwire/2012/08/15/faulting-obama-former-officers-plan-ads-on-bin-laden-leaks

|title=Faulting Obama, Former Officers Plan Ads on Bin Laden Leaks

|first=Alicia

|last=Mundy

|newspaper=Wall Street Journal

|date=August 15, 2012}}

In 2013, the firm was reorganized. Morrell and Kolton quit, while Democratic operative Mike Hacker became partner.{{cite web

|url=https://www.politico.com/tipsheets/politico-influence/2013/04/exclusive-hdmk-announces-reorganization-elevates-hacker-to-partner-meyers-and-associates-picks-up-two-first-quarter-fundraising-appeals-go-out-like-a-lion-010350

|title=Exclusive ... HDMK announces reorganization, elevates Hacker to partner

|first=Anna

|last=Palmer

|author2=Byron Tau |author3=Tarini Parti

|date=2013-04-02

|publisher=Politico}}