Question: Edmund Veesenmayer served under a senior the highest ranking officer in which part of the Nazi German army?

Context paragraphs:
Abel Davis: Brigadier General Abel Davis was an officer in the Illinois National Guard.  He was regarded as "the second highest ranking Jewish officer in the Illinois National Guard, and one of the highest ranking Jewish officers in the United States Army."  He served in the 66th infantry.

Mohammad Usman: Brigadier Mohammad Usman, MVC (15 July 1912 – 3 July 1948) (also known as Usman Mohammad) was the highest ranking officer of the Indian Army killed in the Indo-Pakistani War of 1947.  As a Muslim, Usman became a symbol of India's "inclusive secularism".  At the time of the partition of India he with many other Muslim officers declined to move to the Pakistan Army and continued to serve with the Indian Army.  He was killed in July 1948 while fighting Pakistani soldiers and militia in Jammu and Kashmir.  He was later awarded the second highest military decoration for gallantry in the face of enemy, the Maha Vir Chakra

David Case: Air Commodore David Case is the highest ranking black officer in the Royal Air Force of the United Kingdom, and as of 2000, at the age of 47, he became the highest ranking black officer ever to serve in Britain's armed forces.

Turkish Land Forces: The Turkish Land Forces (Turkish: "Türk Kara Kuvvetleri" ), or Turkish Army (Turkish: "Türk Ordusu" ), is the main branch of the Turkish Armed Forces responsible for land-based military operations.  Official claims state that the army was founded by Modu Chanyu of the Xiongnu Empire in 209 BC, but the modern history of the army began with its formation after the collapse of the Ottoman Empire.  Significant events since the foundation of the Army include combat in the Korean War and in the 1974 Turkish invasion of Cyprus, and acting as a NATO bulwark along Cold War frontiers through 1992.  The army holds the preeminent place within the armed forces.  It is customary for the Chief of the General Staff of the Republic of Turkey to have been the Commander of the Turkish Land Forces prior to his appointment as Turkey's senior ranking officer.  Alongside the other two armed services, the Turkish Army has frequently intervened in Turkish politics, which has now been regulated to an extent with the reform of the National Security Council.  The current commander of the Turkish Land Forces is General Salih Zeki Çolak.

Sepp Dietrich: Josef "Sepp" Dietrich (28 May 1892 – 21 April 1966) was an "Oberst-Gruppenführer" in the Waffen-SS, the armed paramilitary branch of the "Schutzstaffel" (SS), who commanded units up to army level during World War II.  Prior to 1929, he was Adolf Hitler's chauffeur and bodyguard but received rapid promotion after his participation in the extrajudicial executions of political opponents during the 1934 purge known as the Night of the Long Knives.  He later commanded 6th Panzer Army during the Battle of the Bulge.  Despite having no formal staff officer education, Dietrich was, along with Paul Hausser, the highest ranking officer in the Waffen-SS.  After the war he was imprisoned by the United States for war crimes and later by West Germany for his involvement in the 1934 purge.

Dai-gensui: Dai-gensui (grand marshal; literally "great marshal" (大元帥 ) ) was the highest rank of the Greater Imperial Japanese Army and the Imperial Japanese Navy from the 1870s to 1945, when the Empire of Japan was dissolved.  The rank was only ever held by the Emperor of Japan as commander-in-chief of the Empire's Armed Forces and, separately, the highest ranking officer in each of the Armed Services.  The rank was equivalent to a "generalissimo" or general of the armies and admiral of the navy, being a six-star rank senior to the rank of "gensui" ("marshal").  It formally became obsolete in 1947 when the Imperial Japanese armed forces were abolished.

Ernst Kaltenbrunner: Ernst Kaltenbrunner (4 October 190316 October 1946) was an Austrian-born senior official of Nazi Germany during World War II.  An "Obergruppenführer" (general) in the "Schutzstaffel" (SS), between January 1943 and May 1945 he held the offices of Chief of the Reich Main Security Office ("Reichssicherheitshauptamt"; RSHA).  He was the highest-ranking member of the SS to face trial at the first Nuremberg trials.  He was found guilty of war crimes and crimes against humanity and executed.

Chief operating officer: A Chief Operating Officer (COO), also called the chief operations officer, is a position that can be one of the highest-ranking executive positions in an organization, comprising part of the "C-Suite".  The COO is responsible for the daily operation of the company, and routinely reports to the highest ranking executive, usually the chief executive officer (CEO).  The COO is usually the second in command at the firm, especially if the highest ranking executive is the Chairman and CEO.

Edmund Veesenmayer: Edmund Veesenmayer (12 November 1904 in Bad Kissingen – 24 December 1977 in Darmstadt) was a German politician, officer (SS-Brigadeführer) and war criminal.  He significantly contributed to The Final Solution in Hungary and Croatia.  He was a subordinate of Ernst Kaltenbrunner and Joachim von Ribbentrop; and collaborated with Adolf Eichmann.

Artur von Mecenseffy: Artur Edler von Mecenseffy (23 June 1865, Vienna — 6 October 1917, Asiago) was an Austro-Hungarian Army officer who held the rank of "Feldmarschall-leutnant" ("lieutenant field marshal") and served during World War I, becoming the highest ranking officer of Austria-Hungary to be killed on the battlefield.

Supporting paragraphs: Edmund Veesenmayer Ernst Kaltenbrunner
Answer: the SS