Are both Martin Heidegger and José Echegaray engineers?
no
Title: La sombra de Heidegger
Passage: La sombra de Heidegger (English: The Shadow of Heidegger) is a 2005 thriller written by the Argentine philosopher José Pablo Feinmann.  It depicts an exiled Nazi professor called Dieter Müller who writes a letter to his son, in which he describes the philosophy of Martin Heidegger as the spiritual guidance of the Nazi Party.  Besides, "La sombra de Heidegger" has some elements that would enable it to be included in the category of historical novel.  Although there are fictional characters, most of the people involved in the novel are public—and often controversial—figures, such as Adolf Hitler, Ernst Röhm, Jean-Paul Sartre and so on.The novel also covers topics of Argentine political life.  More than once Müller satirizes the situation of peronism in Argentina.
Title: José Echegaray
Passage: José Echegaray y Eizaguirre (19 April 1832 – 4 September 1916) was a Spanish civil engineer, mathematician, statesman, and one of the leading Spanish dramatists of the last quarter of the 19th century.  He was awarded the 1904 Nobel Prize for Literature "in recognition of the numerous and brilliant compositions which, in an individual and original manner, have revived the great traditions of the Spanish drama".
Title: Martin Heidegger
Passage: Martin Heidegger ( ; ] ; 26 September 188926 May 1976) was a German philosopher and a seminal thinker in the Continental tradition and philosophical hermeneutics.  According to the "Internet Encyclopedia of Philosophy", he is "widely acknowledged to be one of the most original and important philosophers of the 20th century".  Heidegger is best known for his contributions to phenomenology and existentialism, though as the "Stanford Encyclopedia of Philosophy" cautions, "his thinking should be identified as part of such philosophical movements only with extreme care and qualification".
José Echegaray Martin Heidegger