Official Account of the Under Secretary of @StateDept for Arms Control and Int'l Security (T).
Washington, DC
Joined October 2016
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I'm honored to serve as Under Secretary for Arms Control & Int'l Security & grateful to @POTUS & @SecRubio for their confidence. Alongside the talented professionals of the bureaus and offices within my remit, I will faithfully execute @POTUS 's mission of achieving peace through strength. Stay tuned for updates on how we’re tackling the tough security challenges of the day.
Today's MOU signing between the United States & Hungary will increase cooperation and information sharing as we confront the resurgence of far-left terrorism. Thank you to @SecRubio and FM @_OrbanAnita for ensuring this important topic is addressed head-on.
Met with Hungarian Foreign Minister @_OrbanAnita to advance our energy and law enforcement priorities. We signed two documents reinforcing Hungary’s commitment to energy diversification and strengthening our joint efforts to combat far-left terrorism.
Under Secretary of State Thomas G. DiNanno retweeted
As our @StateINL Assistant Secretary says: ‘crime knows no borders.’ The United States is a Pacific Nation. We are proud to be working with Australia to keep the Indo-Pacific open and free. – Amb Brat
Under Secretary of State Thomas G. DiNanno retweeted
The growing threat of transnational far-left political terrorism was a blind spot in our counterterrorism strategy for years. No longer under President Trump and @SecRubio, we are addressing this threat with our international partners to make us all safer.
Under Secretary of State Thomas G. DiNanno retweeted
🇵🇱🇺🇸 Historyczna decyzja dla Polski! Jedyne poza USA centrum serwisowe pocisków PAC-3 Patriot powstanie właśnie u nas!
Dziękuję prezydentowi USA @POTUS oraz moim przyjaciołom – Tomowi DiNanno @UnderSecT i ambasadorowi Rose @USAmbPoland – za osobiste zaangażowanie. Tom, dziękuję za wizytę w MON i nasze wspólne rozmowy i ustalenia!
Wielkie podziękowania dla ministra @KosiniakKamysz oraz wszystkich, którzy pracowali na ten sukces w Ministerstwie Obrony Narodowej i polskim przemyśle obronnym. Dziękuję również Minister @magdasobkowiak oraz Ministrowi @ZalewskiPawel za ich zaangażowanie.
Współpraca rządu i prezydenta RP w sprawach strategicznych ma fundamentalne znaczenie. @donaldtusk @NawrockiKn
Dziś wielu jeszcze nie zdaje sobie sprawy, jak ważna dla przyszłości Polski i stosunków polsko-amerykańskich jest ta decyzja. Nasz sojusz będzie tylko silniejszy!
STATEMENT BY U.S. AMBASSADOR THOMAS ROSE
Poland Selected to Host PAC-3 Missile Maintenance Facility
President Trump’s @POTUS decision to select Poland to host the PAC-3 Missile Maintenance Facility marks a major milestone in U.S.–Polish defense cooperation and strengthens @NATO’s collective defense.
Poland earned this opportunity through its strong proposal, eagerness to expand its defense industrial capabilities, and willingness to invest in its own defense. The MMF facility will expand critical maintenance capacity and reinforce trusted supply chains.
This is Polish unity at its best — the Polish government and the @prezydentpl Presidential Chancellery under @NawrockiKn working together to get the job done.
Many thanks to Deputy Prime Minister and Defense Minister Władysław Kosiniak-Kamysz @KosiniakKamysz and the great Polish Rambo @CTomczyk
@magdasobkowiak Deputy Minister Magdalena Sobkowiak-Czarnecka, who deserves special recognition.
Her tireless advocacy, relentless determination, and personal engagement with senior American officials and defense industry leaders, not to mention her countless midnight phone calls and frenetic text barrages, were instrumental in making this happen for Poland. She’s a firecracker!!
Under Secretary of State Tom DiNanno and his team at @StateDept were America’s point of the spear with Tim Cahill @LockheedMartin. Many thanks to Under Secretary of War Michael Duffey @DeptofDefense for pushing this past the finish line.
This was no easy decision. Germany, Sweden, and the Netherlands submitted outstanding proposals. All three are indispensable NATO allies whose defense industrial capabilities will be essential as we build NATO 3.0. There will be many more opportunities.
This is @POTUS vision in action: allies investing in their own defense, expanding industrial capacity, and working together to build a stronger, more capable, more self-reliant NATO.
Thomas Rose
United States Ambassador to Poland
This is the definition of turning vision into action. This announcement is the beginning of a new and incredibly important chapter in the U.S.-Poland partnership on defense cooperation. Thank you to @USAmbPoland Rose for your leadership.
STATEMENT BY U.S. AMBASSADOR THOMAS ROSE
Poland Selected to Host PAC-3 Missile Maintenance Facility
President Trump’s @POTUS decision to select Poland to host the PAC-3 Missile Maintenance Facility marks a major milestone in U.S.–Polish defense cooperation and strengthens @NATO’s collective defense.
Poland earned this opportunity through its strong proposal, eagerness to expand its defense industrial capabilities, and willingness to invest in its own defense. The MMF facility will expand critical maintenance capacity and reinforce trusted supply chains.
This is Polish unity at its best — the Polish government and the @prezydentpl Presidential Chancellery under @NawrockiKn working together to get the job done.
Many thanks to Deputy Prime Minister and Defense Minister Władysław Kosiniak-Kamysz @KosiniakKamysz and the great Polish Rambo @CTomczyk
@magdasobkowiak Deputy Minister Magdalena Sobkowiak-Czarnecka, who deserves special recognition.
Her tireless advocacy, relentless determination, and personal engagement with senior American officials and defense industry leaders, not to mention her countless midnight phone calls and frenetic text barrages, were instrumental in making this happen for Poland. She’s a firecracker!!
Under Secretary of State Tom DiNanno and his team at @StateDept were America’s point of the spear with Tim Cahill @LockheedMartin. Many thanks to Under Secretary of War Michael Duffey @DeptofDefense for pushing this past the finish line.
This was no easy decision. Germany, Sweden, and the Netherlands submitted outstanding proposals. All three are indispensable NATO allies whose defense industrial capabilities will be essential as we build NATO 3.0. There will be many more opportunities.
This is @POTUS vision in action: allies investing in their own defense, expanding industrial capacity, and working together to build a stronger, more capable, more self-reliant NATO.
Thomas Rose
United States Ambassador to Poland
Under Secretary of State Thomas G. DiNanno retweeted
Deterring adversaries. Delivering for warfighters. In partnership with @LockheedMartin, the new PAC-3 Missile Maintenance Facility in Poland strengthens readiness and sustains NATO’s Eastern Front.
ow.ly/jpPL5101nab
Under Secretary of State Thomas G. DiNanno retweeted
Far-left political terrorism is a transnational threat that requires a transnational response. Violent actors are planning attacks in one country, recruiting in another country, and committing attacks in a third. We are connecting the practitioners to the policy makers to address this transnational threat.
Under Secretary of State Thomas G. DiNanno retweeted
The United States commends President @JMilei and Argentina for designating the Sinaloa Cartel, Nueva Familia Michoacana, Los Tiguerones, and the far-left National Liberation Army and Revolutionary Armed Forces of Colombia – People’s Army as terrorist organizations. These terrorists threaten our entire hemisphere. Argentina is a steadfast partner. 🇺🇸 🇦🇷
apnews.com/article/argentina…
Under Secretary of State Thomas G. DiNanno retweeted
American leadership delivers. #UNTOC2026 adopted by consensus the reform resolution we championed for a more effective UNTOC COP, and a more efficient @UN. Above all, it's about results against organized crime for a stronger and safer America.
@State_IO @StateINL @UNODC
Officials from the @StateDept Bureau of Emerging Threats were proud to attend and support the @WhiteHouse roundtable on fighting cybercrime. Cyberscammers beware: the gloves are off! The scams must end.
Under Secretary of State Thomas G. DiNanno retweeted
Peace of mind for our allies. Sleepless nights for our adversaries.
#AUKUS 🇦🇺🇬🇧🇺🇸
Under Secretary of State Thomas G. DiNanno retweeted
When the Pacific Islands are secure, the American homeland is safer. state.gov/releases/office-of…
Thank you for a productive meeting, @JapanEmbDC Ambassador Yamada. I value the U.S.-Japan 🇺🇸🇯🇵 Alliance, which is built on our continued close coordination on issues including extended deterrence and arms control, and which grows stronger every day.
Last week’s U.S.-ASEAN Cyber Dialogue underscored how cybersecurity is key to national security. The United States and its @ASEAN partners are working together to safeguard citizens from cybercrimes and online scams.
state.gov/releases/office-of…
Under Secretary of State Thomas G. DiNanno retweeted
A visa is a privilege and not a right. The United States is imposing visa restrictions on 21 individuals in Colombia to root out criminal networks across our hemisphere.
The Bureau of Emerging Threats was proud to support @ONCD Director Sean Cairncross at last week’s U.S.-Singapore Cyber Dialogue. Together, we are committed to actively countering cybersecurity threats and holding malicious cyber actors accountable globally.
state.gov/releases/office-of…
More than 12,100 gang members have been arrested, including more than 1,500 Tren de Aragua affiliates and nearly 2,000 MS-13 affiliates, along with more than 2,200 known or suspected terrorists (more than 2,000 of whom have been removed).
whitehouse.gov/releases/2026…
Under Secretary of State Thomas G. DiNanno retweeted
Deterrence in the Indo-Pacific requires real, deployable lethality.
Watch my recap from Maritime Big Play Pacific DVDay on how #AUKUS is taking advanced autonomous capabilities from the lab straight to our operators.
As just announced in the @UN First Committee, Russia’s COSMOS 2612 military satellite has been exhibiting threatening behavior by intentionally maneuvering dangerously close to a commercial satellite, behaviors consistent with on-orbit weapons operations. This violates long-established safety thresholds in low Earth orbit. The United States will continue to secure and defend American vital national security interests in, from, and to space.
Companies from across #AUKUS are gathering in San Diego, California this month to test exciting new technology – from uncrewed boats and underwater drones to undersea communications. These tests exemplify the seamless collaboration of our trilateral defense innovation system. We will continue to supercharge each of our defense industrial bases and systematically break down barriers to cooperation. Incredible work! 🇺🇸🇬🇧🇦🇺