Command Sergeant Major Pedro Sierra was born on 24th May 1964 in Madrid, Spain.
In December 1982, he joined the Army as a conscript soldier in the 71st Air Defense Artillery Regiment where he was promoted to Corporal and Lance Corporal. In September 1985 he joined the Army NCO School where after three years he became an Artillery Staff Sergeant. He served in the 11th Artillery Regiment based in Madrid until 1992. From 1992 to 1994 he was assigned to the Spanish Rapid Action Forces HQ as an Intel Staff assistant.
In 1994 he was assigned to NATO SCHOOL in Oberammergau in Germany as the NCO in charge of the Academic Building. In 1997 he was promoted to Sergeant First Class. Then in 1998 he joined the Spanish Verification Unit until 2007, performing his duties as an Inspector/Escort in CFE, Open Skies and Vienna Document Treaties. He was promoted to Master Sergeant.
In August 2007 he was assigned to NATO Deployable Corps in Thessaloniki in Greece as a Chief of the Spanish NSE until 2011 when he returned to Spain and joined the Army Staff in the Logistic Division as a Staff assistant.
In August 2014 he was assigned to the Head Office of Spanish Defense Attaché of the Spanish Embassy in La Habana in Cuba for four years. He was promoted to Chief Master Sergeant. In September 2018 he joined the Spanish Army Legal Advisor Department until he was promoted to Command Sergeant Major in 2019 and posted to the National Defense Advanced Studies Centre (CESEDEN) where he is CSEL.
During his military career, he has attended several military courses like Self Propelled Artillery, Explosive Ordnance Disposal, Intelligence National Course, Conventional Armed Forces in Europe (CFE), Open Skies and Vienna Document Treaty limited equipment, Special Ops Intelligence course, TEO course, NATO NCO Advanced Leadership in Multinational Environment (M1-95-A-22) and NATO CSEL (S1-84-A-22) course.
CSM Sierra’s mission: Bosnia (UNPROFOR) in 1992 as Deputy Commander’s Clerk, NATO Kosovo in 2000 as an Intelligence Analyst, Enduring Freedom in Tampa, Florida in USA, in 2002 as a Staff assistant in the Spanish Cell, NATO Skopje in 2003 as Commander’s Senior Admin, UNIFIL Strategic Military Cell in NYC (USA), in 2007 as a Staff assistant within Operations Department, and NATO ISAF in 2013 as an Intelligence analyst for SOF at the Fusion Cell in Kabul, Afghanistan.
CSM Sierra has been awarded with: Knight of the Royal and Military Order of San Hermenegildo (Plaque, Commendation and Cross), 2 Spanish Army Military Merit Crosses. UN medals (UNPROFOR and UNHQ), NATO Medals (Kosovo, North Macedonia and Afghanistan), and Achievement and Meritorious Service medal from US. And “Peace for Kosovo” Italian medal.
CSM Sierra is married to Esther and has one daughter Maria Victoria (32) and three sons Pedro (30), Nicolás (16) and Mateo (13).
Download Biography
Download Portrait