Question: Who did Hayek work for upon being hired by the author of Omnipotent Government?

Knowledge 1: Omnipotent Government
Omnipotent Government: The Rise of the Total State and Total War is a book by Austrian School economist Ludwig von Mises first published in 1944 by Yale University Press. It is one of the most influential writings in Libertarian social thought and critique of statist ideology and socialism, examining the rise of Nazism as an example. The book treats Nazism as a species of orthodox socialist theory. At the same time the book offers a critique of economic interventionism, industrial central planning, the welfare state and world government, denouncing the trends of the Western Allies towards the total state. The book was made available online by the Ludwig von Mises Institute in 2004. [SEP] Knowledge 2: Friedrich Hayek
During Hayek's years at the University of Vienna, Carl Menger's work on the explanatory strategy of social science and Friedrich von Wieser's commanding presence in the classroom left a lasting influence on him. Upon the completion of his examinations, Hayek was hired by Ludwig von Mises on the recommendation of Wieser as a specialist for the Austrian government working on the legal and economic details of the Treaty of Saint Germain. Between 1923 and 1924 Hayek worked as a research assistant to Prof. Jeremiah Jenks of New York University, compiling macroeconomic data on the American economy and the operations of the US Federal Reserve.
Knowledge 1: Omnipotent Government
Omnipotent Government: The Rise of the Total State and Total War is a book by Austrian School economist Ludwig von Mises first published in 1944 by Yale University Press. It is one of the most influential writings in Libertarian social thought and critique of statist ideology and socialism, examining the rise of Nazism as an example. The book treats Nazism as a species of orthodox socialist theory. At the same time the book offers a critique of economic interventionism, industrial central planning, the welfare state and world government, denouncing the trends of the Western Allies towards the total state. The book was made available online by the Ludwig von Mises Institute in 2004. [SEP] Knowledge 2: Friedrich Hayek
With the help of Mises, in the late 1920s Hayek founded and served as director of the Austrian Institute for Business Cycle Research, before joining the faculty of the London School of Economics (LSE) in 1931 at the behest of Lionel Robbins. Upon his arrival in London, Hayek was quickly recognised as one of the leading economic theorists in the world, and his development of the economics of processes in time and the co-ordination function of prices inspired the ground-breaking work of John Hicks, Abba Lerner, and many others in the development of modern microeconomics.
Knowledge 1: Omnipotent Government
Omnipotent Government: The Rise of the Total State and Total War is a book by Austrian School economist Ludwig von Mises first published in 1944 by Yale University Press. It is one of the most influential writings in Libertarian social thought and critique of statist ideology and socialism, examining the rise of Nazism as an example. The book treats Nazism as a species of orthodox socialist theory. At the same time the book offers a critique of economic interventionism, industrial central planning, the welfare state and world government, denouncing the trends of the Western Allies towards the total state. The book was made available online by the Ludwig von Mises Institute in 2004. [SEP] Knowledge 2: Friedrich Hayek
In 1929, Lionel Robbins assumed the helm of the London School of Economics (LSE). Eager to promote alternatives to what he regarded as the narrow approach of the school of economic thought that then dominated the English-speaking academic world (centred at the University of Cambridge and deriving largely from the work of Alfred Marshall), Robbins invited Hayek to join the faculty at LSE, which he did in 1931. According to Nicholas Kaldor, Hayek's theory of the time-structure of capital and of the business cycle initially "fascinated the academic world" and appeared to offer a less "facile and superficial" understanding of macroeconomics than the Cambridge school's.

Answer: the Austrian government