Allied Command Transformation (ACT) (French: Commandement allié Transformation) is a military command of the North Atlantic Treaty Organization (NATO), formed in 2003 after restructuring.

It was intended to lead military transformation of alliance forces and capabilities, using new concepts such as the NATO Response Force and new doctrines in order to improve the alliance's military effectiveness. When France rejoined the NATO Military Command Structure in mid-2009, a significant change took place where the Supreme Allied Commander Transformation (SACT) became a French officer. The first French officer to serve as SACT was French Air Force General Stephane Abrial (2009–2012).

Allied Command Transformation was preceded by Allied Command Atlantic (ACLANT) established in 1952 under the overall command of Supreme Allied Commander Atlantic (SACLANT), with its headquarters at Norfolk, Virginia. ACLANT's purpose was to guard the sea lines of communication between North America and Europe in order to reinforce the European countries of NATO with U.S. troops and supplies in the event of a Soviet/Warsaw Pact invasion of Western Europe. Following the end of the Cold War, the Command was reduced, with many of its subordinate headquarters spread across the Atlantic area losing their NATO status and funding. However, the basic structure remained in place until the Prague Summit in the Czech Republic in 2002. This led to ACLANT being decommissioned effective 19 June 2003, and a new Allied Command Transformation being established as its successor.

Admiral Edmund P. Giambastiani Jr. US Navy became the last SACLANT on 2 October 2002. He served as ACLANT commander until 19 Jun 2003. He then served as Supreme Allied Commander, Transformation, until 1 Aug 2005. Admiral Sir Mark Stanhope RN, the Deputy Supreme Allied Commander, then served as Acting Supreme Allied Commander until the arrival of General Lance L. Smith USAF in November 2005.

At the 2002 Prague Summit, it was decided that NATO should change its military structures and concepts, and acquire new types of equipment to face the operational challenges of coalition warfare against the threats of the new century. Thus NATO's military command structure was reorganized. One strategic command, Allied Command Transformation, was focused on transforming NATO, while the other strategic command focused on NATO's operations, Allied Command Operations. Initial reports about a NATO transformation command began to appear in July 2002. ACT was formally established on June 19, 2003.

A suite of "Baseline for Rapid Iterative Transformational Experimentation" (BRITE) software was designed in response to the Maritime Situational Awareness request. This request, a product of a U.S. international and inter-agency initiatives termed "Maritime Domain Awareness," serves to counter threats to the maritime commons including terrorism, human/drug smuggling, piracy, and espionage.

Since Allied Command Atlantic became Allied Command Transformation, commanders have included non-naval officers. Gen. Lance L. Smith USAF commanded ACT from 10 Nov 2005 until 9 Nov 2007. He was succeeded by Gen. James N. Mattis USMC, who served from 9 Nov 2007 - 08 Sep 2009. A significant change was the assumption of command by a French officer, after France rejoined the NATO Command Structure in mid-2009. General Stéphane Abrial, former chief of the French Air Force assumed command in 2009. French Air Force General Jean-Paul Paloméros replaced Abrial at the end of September 2012. On 30 September 2015 French Air Force General Denis Mercier succeeded General Paloméros, in September 2018 General André Lanata succeeded General Mercier, and in 2021 General Philippe Lavigne succeeded General Lanata.

The Deputy Supreme Allied Commander Transformation position is currently filled by General Chris Badia of the German Air Force. He succeeded General Paolo Ruggiero, Italian Army, who succeeded Admiral Manfred Nielson, German Navy, who succeeded General Mirco Zuliani of the Italian Air Force, General Mieczysław Bieniek of the Polish Land Forces, Admiral Luciano Zappata (Italian Navy) and Admiral Stanhope. For several years, in a carryover from SACLANT, the Deputy's position was filled by a Royal Navy admiral. Stanhope's succession by Zappata meant an end to this practice.

Allied Command Transformation's current mission is to:

• provide the conceptual framework for the conduct of future combined joint operations;
• define how future operations will be conducted and what capabilities they will need;
• take new operational concepts, from others or self-generated, assess their viability and value, and bring them to maturity through doctrine development, scientific research, experimentation and technological development;
• implement both by persuading nations, individually and collectively, to acquire the capability, and provide the education and training, enabling concepts to be implemented by NATO forces.

A large number of conferences and seminars have been organised by the command in fulfilment of its conceptual development mission. These have included CD&E, a national Chiefs of Transformation conference, an examination of the Global Commons, Law of Armed Conflict, and a Multiple Futures project.

POLITICAL-STRATEGIC LEVEL:

North Atlantic Council (NAC) NATO Headquarters, Brussels, BEL

Secretary-General (SECGEN) NATO Headquarters, Brussels, BEL

International Staff (IS) NATO Headquarters, Brussels, BEL

MILITARY-STRATEGIC LEVEL:

International Military Staff (IMS) NATO Headquarters, Brussels, BEL

Military Committee (MC) NATO Headquarters, Brussels, BEL

STRATEGIC COMMANDS:

Supreme Allied Commander Transformation Allied Command Transformation (ACT) Norfolk, USA

Supreme Allied Commander Europe Allied Command Operations (ACO) Mons, BEL

TRANSFORMATION COMMANDS:

OPERATIONAL COMMANDS:

Joint Warfare Centre (JWC) Stavanger, NOR

Joint Force Command Brunssum (JFC Brunssum) Brunssum, NLD

Allied Air Command (AIRCOM) Ramstein, DEU

Joint Force Training Centre (JFTC) Bydgoszcz, POL

Joint Force Command Naples (JFC Naples) Naples, ITA

Allied Land Command (LANDCOM) İzmir, TUR

Joint Analysis and Lessons Learned Centre (JALLC) Lisbon, PRT

Joint Force Command Norfolk (JFC Norfolk) Norfolk, Virginia, USA

Allied Maritime Command (MARCOM) Northwood, GBR

Joint Support and Enabling Command (JSEC) Ulm, DEU

The command's headquarters is in Norfolk, Virginia, in the United States. HQ SACT itself is organised into a command group, the Transformation Directorate, the Transformation Support Directorate, National Liaison Representatives, the Partnership for Peace Staff Element and Reservists responsible to HQ SACT.

The Transformation Directorate is headed by the Deputy Chief of Staff (DCOS) Transformation who acts as the Supreme Allied Commander, Transformation's (SACT) Director for guidance and coordination of the activities of his or hers Directorate Transformation, divided in two divisions: Implementation and Capabilities. Within the full scale of SACT's transformational responsibilities the Deputy Chief of Staff (DCOS) Transformation assists the Chief of Staff (COS) in the execution of his or her duties with emphasis on deliverables to the Alliance Military Transformation Process in order to enhance NATO's operational capabilities and to meet NATO's future requirements.

The Implementation Division, led by Assistant Chief of Staff (ACOS) Implementation, is responsible for guidance and coordination of the activities of two Sub-Divisions, Joint Education and Training (JET) and Joint Experimentation, Exercises and Assessment (JEEA), as well as providing guidance for the Joint Warfare Centre (JWC) and Joint Analysis Lessons Learned Centre (JALLC), in their efforts to enhance training programs, to carry out concept development and experimentation, to press on common standards, and to develop effective programs to capture and implement lessons learned. This division probably serves as NATO's linkpoint to the annual U.S.-led Coalition Warrior Interoperability Demonstration.

The Capabilities Division, led by Assistant Chief of Staff (ACOS) Capabilities, is responsible for guidance and coordination of the activities of three Sub-Divisions: of Strategic Concepts, Policy and Interoperability (SCPI); Future Capabilities, Research and Technology (FCRT) and Defence Planning (Def Plan) in their efforts to staff Capabilities, Concepts and Development products.

Reflecting NATO as a whole, ACT has a presence on both sides of the Atlantic. Before the deactivation of United States Joint Forces Command, the two organisations were co-located, and indeed shared a commander for some time. There is an ACT command element located at SHAPE in Mons, Belgium. ACT's major subordinate commands are the Joint Warfare Centre (JWC) in Stavanger, Norway; the Joint Force Training Centre (JFTC) in Bydgoszcz, Poland; and the Joint Analysis and Lessons Learned Centre (JALLC) in Monsanto, Portugal. Under a customer-funded arrangement, ACT invests about 30 million Euros into research with the NATO Communications and Information Agency (NCIA) each year to support scientific and experimental programs.

A Centre of Excellence (COE) offers recognized expertise and experience to the benefit of the Alliance, especially in support of transformation. Most are single-nation sponsored, but some are sponsored by multiple members. It provides opportunities to enhance education and training, to improve interoperability and capabilities, to assist in doctrine development and/or to test and validate concepts through experimentation. A COE is not a part of the NATO Military Command Structure, but their activities with NATO are coordinated through Headquarters SACT. Since COEs are predominantly multinational entities, most COEs are overseen by a steering committee (SC), that sets the programme of work and approves the budget for the COE. The SC consists of one voting representative of each Sponsoring Nation (SN) and a various number of observers. All decisions are made by consensus.

Principles:

• No duplication or competition with existing NATO capabilities
• Nationally funded
• Conforms to NATO procedures, doctrines, standards and security policies
• Coordinated Programmes of Work provide guidance with inputs from both ACT and ACO organisations

NATO has the following accredited COEs:

• The Air Operations Centre of Excellence - also knows as the Centre for Analysis and Simulation of Air Operations (CASPOA COE) in Lyon, France
• The Civil-Military Cooperation Centre of Excellence (CIMIC COE) in The Hague, Netherlands
• The Cold Weather Operations Centre of Excellence (COE CWO) in Elverum, Norway
• The Combined Joint Operations from the Sea Center of Excellence (CJOS-COE) in Norfolk, Virginia, United States
• The Command & Control Centre of Excellence (C2 COE) in Utrecht, Netherlands
• The Cooperative Cyber Defence Centre of Excellence (CCD COE) in Tallinn, Estonia
• The Counter Improvised Explosive Devices Centre of Excellence (C-IED COE) in Madrid, Spain
• The Counter Intelligence Centre of Excellence (CI COE) in Kraków, Poland
• The Crisis Management for Disaster Response Centre of Excellence (CMDR COE) in Sofia, Bulgaria
• The Defence Against Terrorism Centre of Excellence (DAT COE) in Ankara, Turkey
• The Energy Security Centre of Excellence (ENSEC COE) in Vilnius, Lithuania
• The Explosive Ordnance Disposal Centre of Excellence (EOD COE) in Trenčín, Slovakia
• The Human Intelligence Centre of Excellence (HUMINT COE) in Oradea, Romania
• The Integrated Air & Missile Defence Centre of Excellence (IAMD COE) in Crete, Greece
• The Joint Air Power Competence Center (JAPCC) in Kalkar, Germany
• The Joint Chemical, Biological, Radiation, & Nuclear Defence Centre of Excellence (JCBRN Defence COE) in Vyškov, Czech Republic
• The Maritime Geospatial, Meteorological & Oceanographic Centre of Excellence (MGEOMETOC COE) in Lisbon, Portugal
• The Maritime Security Centre of Excellence (MARSEC COE) in Istanbul, Turkey
• The Military Engineering Centre of Excellence (MILENG COE) in Ingolstadt, Germany
• The Military Medical Centre of Excellence (MILMED COE) in Budapest, Hungary
• The Military Police Centre of Excellence (MP COE) in Bydgoszcz, Poland
• The Modelling and Simulation Centre of Excellence (M&S COE) in Rome, Italy
• Mountain Warfare Centre of Excellence (MW COE) in Begunje na Gorenjskem, Slovenia
• The Naval Mine Warfare Centre of Excellence (NMW COE) in Ostend, Belgium
• The Operations in Confined and Shallow Waters Centre of Excellence (CSW COE) in Kiel, Germany
• The Security Force Assistance Centre of Excellence (SFA COE) in Rome, Italy
• The Space Centre of Excellence (Space COE) in Toulouse, France
• The Stability Policing Centre of Excellence (SP COE) in Vicenza, Italy
• The Strategic Communications Centre of Excellence (STRATCOM COE) in Riga, Latvia

No.	Portrait	Supreme Allied Commander	Took office	Left office	Time in office	Defence branch
1		Giambastiani, EdmundAdmiral Edmund Giambastiani (born 1948)	19 June 2003	19 June 2005	2 years, 0 days	United States Navy
2		Smith, LanceGeneral Lance L. Smith (born 1946)	10 November 2005	9 November 2007	1 year, 364 days	United States Air Force
3		Mattis, JimGeneral James Mattis (born 1950)	9 November 2007	9 September 2009	1 year, 304 days	United States Marine Corps
4		Abrial, StéphaneGénéral d'armée Aérienne Stéphane Abrial (born 1954)	9 September 2009	28 September 2012	3 years, 19 days	French Air Force
5		Paloméros, JeanGénéral d'armée Aérienne Jean-Paul Paloméros (born 1953)	28 September 2012	30 September 2015	3 years, 2 days	French Air Force
6		Mercier, DenisGénéral d'armée Aérienne Denis Mercier (born 1959)	30 September 2015	11 September 2018	2 years, 346 days	French Air Force
7		Lanata, AndréGénéral d'armée Aérienne André Lanata (born 1961)	11 September 2018	23 September 2021	3 years, 12 days	French Air and Space Force
8		Lavigne, PhilippeGénéral d'armée Aérienne Philippe Lavigne (born 1965)	23 September 2021	23 September 2024	3 years, 0 days	French Air and Space Force
9		Vandier, PierreAmiral Pierre Vandier (born 1967)	23 September 2024	incumbent	37 days	French Navy

No.	Name	Picture	Began office	End office	Defence branch
1	Admiral Sir Ian Forbes (born 1946)		1 July 2003	10 July 2004	Royal Navy
2	Admiral Sir Mark Stanhope (born 1952)		10 July 2004	3 July 2007	Royal Navy
3	Admiral Luciano Zappata		3 July 2007	29 September 2010	Italian Navy
4	General Mieczysław Bieniek (born 1951)		29 September 2010	3 September 2013	Polish Land Forces
5	General Mirco Zuliani (born 1953)		3 September 2013	24 March 2016	Italian Air Force
6	Admiral Manfred Nielson (born 1955)		24 March 2016	19 July 2019	German Navy
7	General Paolo Ruggiero (born 1957)		19 July 2019	7 July 2022	Italian Army
8	General Chris Badia (born 1963)		7 July 2022	incumbent	German Air Force

• Official website
• Centres of Excellence on the NATO website
• Centres of Excellence on the HQ SACT website
• ACT NATO Centres Of Excellence
• Distributed Networked Battle Labs

50°29′58″N 3°59′02″E / 50.49944°N 3.98389°E / 50.49944; 3.98389