Between 1978 and 1984, Lauk led Boston Consulting Group's German practice.[3] He was deputy chief executive officer and chief financial o(with responsibility for finance, controlling and marketing) of Audi AG between 1989 and 1992. Ten months after the trans-Atlantic merger that created DaimlerChrysler A.G. in 1999, Lauk, then the head of Daimler's truck division, stepped down along with Thomas T. Stallkamp, CEO of Chrysler, and Heiner Tropitzsch, Daimler’s personnel chief.[4]
Lauk is the co-founder and president of Globe CP GmbH, a private investment firm established in 2000.[5]
As head of the Economic Council, Lauk advocated a more forceful discussion of economic issues in Germany[9] and has been highly critical of Merkel’s economic policies. He has been a vocal critic of Merkel's reluctance to introduce bold economic reforms,[10] often arguing that she has been bowing to pressure from the Social Democratic Party over several major issues, including the introduction of a minimum wage and pensions increases.[11] On government proposals to cut the retirement age for veteran workers to 63 and increase pensions for mothers in 2014, Lauk argued that Germany was setting "a bad example" not only for vulnerable southern European nations but also for France.[12]
In 2010, Lauk described German industry as "the infrastructure provider to emerging countries" for the next 10 years, yet warned that promising areas like software, biogenetics and nanotechnologies were lacking.[13] As for Germany's role as world export leader, he argued that the country's current weakness suggested that over the next decade it could probably sink to a middling place in the global top ten.[14]
In a 2015 letter published in Frankfurter Allgemeine Zeitung, Lauk wrote to German lawmakers urging them to vote against the Merkel government’s proposal for a four-month extension of Greece's bailout, arguing that "a simple extension of the aid program without effective terms would mean that we are knowingly throwing further good money after bad".[15]
In September 2019, Lauk filed a lawsuit in the United States District Court for the Central District of California, alleging Vista Equity Partners sought to use its control of Solera Holdings' board for its own benefit by urging its directors – including himself – to buy at inflated prices other companies the firm owns. He also argued that he was removed from his position on the board of directors in May 2019 after he demanded an investigation into what he alleged was Vista’s “self-dealing.”[26] In a response, Vista denied all charges and argued instead that Lauk was a “crony” of Solera’s former CEO Tony Aquila who had been fired in May 2019 over allegations of “aggressive and abusive” behavior.[27]