Career after politics
In September 2011, Guttenberg joined the Washington-based Center for Strategic and International Studies (CSIS). At the Halifax International Security Forum in November 2011, Guttenberg made his first public appearance since joining CSIS. During a plenary session on the Great Recession, he voiced pessimism about the current state of the EU and decried a severe "crisis of political leadership".
In November 2011, Guttenberg published the book Vorerst gescheitert (lit. 'Failed for Now'). The publication is based on a series of conversations with the editor-in-chief of Die Zeit, Giovanni di Lorenzo, in which Guttenberg talks extensively for the first time about his political career, the plagiarism scandal and his resignation, as well as his plans for the future. Guttenberg's criticism in the book of the direction which the CSU is headed sparked some controversy within his party.
Since 2013, he has been a member of the International Advisory Board of Barrick Gold Corporation.
Guttenberg is a strong critic of Russian president Vladimir Putin's expansionist foreign policy. In Spring 2014, he decried an "astonishing leadership vacuum in the world" and demanded that the West, and especially Europe, respond to Moscow's aggressions with strong political action. He praised Chancellor Merkel for her firm stance against Putin. Guttenberg appeared together with Henry Kissinger during a CNN interview about the Russo-Ukrainian war and explained the significant domestic political resistance that Merkel's Russia policy faced in Germany. Several months later Guttenberg accused the EU of inaction and a lack of capabilities given the crises in Ukraine and the Middle East.
Since July 2014, he has also been an advisor to Ripple Labs.
In October 2015, former CSU chairman Horst Seehofer appointed Guttenberg to his competence team for the election campaign. He has also been advising Deutsche Lufthansa on innovation issues since 2015.
At Edelman, he was initially a founding member of the Global Advisory Board, established in 2018, and was later appointed to the Board of Directors. He is also a board member of the Institute for Strategic Dialogue (ISD).
Guttenberg is a member of the advisory board of Renew Democracy Initiative, a non-partisan organization founded in 2017.
In 2022, Guttenberg signed a contract with RTL Television. His documentary on Vladimir Putin, "KT Guttenberg − Auf den Spuren der Macht Der Fall Putin", was broadcast on RTL+ in autumn 2022 and then on n-tv on 12 December 2022. A second programme, "KT Guttenberg − Um Gottes Willen? Die Macht der Kirche in Deutschland" was broadcast on n-tv in January 2024.
In December 2022, he co-hosted the annual review "Menschen, Bilder, Emotionen" with Thomas Gottschalk.
Since 2023, there is a weekly podcast with Gregor Gysi called "Gysi gegen Guttenberg – Der Deutschland-Podcast". In September 2024, a book based on their joint podcast was published entitled „Gysi gegen Guttenberg: Gespräche über die Zeit, in der wir leben“.
In October 2023, Guttenberg published his book „3 Sekunden – Notizen aus der Gegenwart“, in which he shares his thoughts on everyday observations. These are based on posts he had previously published on LinkedIn. In August 2025, the book „3 Worte – Neue Notizen aus der Gegenwart“ was published. Since the end of 2023, several articles by Guttenberg have been published in Focus magazine.
In 2013, Guttenberg formed Spitzberg Partners LLC, a consulting and investment company. In September 2014, Spitzberg Partners and Canadian Acasta Capital founded Atlantic Advisory Partners (AAP), a partnership to promote business and trade between Canada and the European Union in connection with the Comprehensive Economic and Trade Agreement (CETA).
Guttenberg invests in several companies through New York-based Spitzberg Partners.
He is reported by Intelligence Online to help German and European companies to enter the U.S. market. His firm Spitzberg Partners works with private and government entities (such as the state of Delaware in the Global Delaware project).
One of his investments is the government and defense procurement company Govradar, founded by Bundeswehr reserve officer and former Palantir employee Sascha Goyk. Due to Guttenberg's former government positions and his partner Katherina Reiche's current role in the government, the investment has been discussed by German media as a possible case of conflict of interests.
In 2022, Guttenberg co-founded the production company Open Minds Media GmbH, in which Dominik Wichmann and Klaus Brinkbäumer, among others, hold shares. In 2026, Open Minds Media launched the GUTTENBERG media brand, whose publications include the newsletter "NEULAND Update" and the podcasts "Land in Sicht" and "Make America Good Again". Open Minds Media also produced the ARD documentary “'Westerwelle”' about Guido Westerwelle, directed by Jobst Knigge.