Lars Grünwoldt was born in Mecklenburg/Germany. He began his musical education at the age of five, receiving piano instruction from Camilla Bender, later from Karin Knöfel. At the age of 14 he was admitted to the special musical education class at the J. W. v. Goethe Gymnasium in Demmin, where he enjoyed a wide-ranging musical training, taking part in the concerts of the State Youth Choir under the direction of Stefan Richter. In 1995 he started singing lessons with Kammersänger Siegfried Eisenbach at the Rudolf Wagner Régeny Conservatory in Rostock. From 1996, Lars Grünwoldt studied at the new Academy of Music and Theatre in Rostock under Prof. Waldemar Wild and the Welsh baritone Anthony Baldwin. Having obtained his intermediate diploma, he moved to the renowned Academy of Music Hanns Eisler in Berlin, where he studied under Professor Scot Weir, completing his diploma in February 2004.

In the course of his studies he participated in numerous master classes, held by, for instance, Dietrich Fischer-Dieskau, Thomas Quasthoff and Rudolf Piernay in the context of the Stuttgart Bach Week. He attended the lied class of Professor Wolfram Rieger from 2001 to 2004.

In 2003 he was prizewinner at the International Voice Competition of the Schloss Rheinsberg Chamber Opera and participant in the first Rheinsberg Opera Workshop, and in 2004 prizewinner at the Podium of Young Vocal Soloists in Wiesbaden. Another distinction was participation in the production of Mozart’s opera "L’óca del cairo" initiated by the Academy of Music Hanns Eisler Berlin with graduates in the summer of 2004. In 2005 the singer was awarded a five-year scholarship by the "Live Music Now" foundation established by Yehudi Menuhin.

While still studying, Lars Grünwoldt built up a comprehensive concert and lied repertoire ranging from Bach and Handel to Schubert, Brahms, Fauré, Wolf, and Mahler, as well as Shostakovich, Barber, and Matthus. In 2000 he sang the role of Don Alfonso (Cosí fan tutte) for the first time in the Academy production. Other Mozart roles followed, like Allazim (Zaide) and Don Giovanni, as well as the Friend (Le pauvre matelot) by Darius Milhaud and Jago in Verdi’s Otello. Grünwoldt has also been engaged for many free productions, for example in the role of Aleko in the eponymous opera by Rachmaninov and that of Cesare Angelotti in company with such acclaimed soloists as Anda-Luise Bogza, Endrik Wottrich, and Hannu Niemelä in Puccini’s Tosca.

Among the roles sung by the bass-baritone as grantee of the Komische Oper Berlin was the principal role of Damon in "Pastorelle en musique" by Georg Philipp Telemann alongside Jochen Kowalski. During his studies, he appeared in opera productions at the Staatoper Unter den Linden, Berlin, the Berlin Chamber Opera, and the Theater Magdeburg. As member of the opera studio at the National Theatre of Luxembourg he sang the principal role in the first performance of "Virus Alert", an opera by the Belgian composer Jacqueline Fontyn. After completing his degree, he gave guest performances in 2005 as Schlemihl (Les Contes d’Hoffmann) at the Staatstheater Braunschweig and Leporello (Don Giovanni) at the Theater Kampnagel in Hamburg, upon which the Hamburg State Opera engaged him under production contract for "I tre indovinelli" by Detlev Glanert in 2006.

In the same year he gave his debut as Count Almaviva (Le nozze di Figaro) at the Stadttheater Koblenz. This was followed in 2007 by the first performance of Lucia Ronchetti’s opera "Der Sonne entgegen" at the Theater Gelsenkirchen. During the 2007/2008 season he is to be heard in the role of Professor Hoggins in an opera by Mike Svoboda at the Stadttheater Bielefeld. At the Schloss Heidenheim Opera Festival 2008, Grünwoldt is singing the part of Kaspar (Der Freischütz) by Carl-Maria von Weber.

The bass-baritone has worked with directors like Claus Unzen, Michael von zur Mühlen, Michiel Dijkema, Susanne Knapp, Immo Karaman, Peter Konwitschny, Kay Kunze, Hans-Peter Lehmann, Kerstin-Maria Pöhler and Matthias Remus and with orchestras like the Konzerthausorchester Berlin, the Concerto Brandenburg, the Staatskapelle Braunschweig, the Brandenburg Staatsorchester, the Ensemble Resonanz (Hamburg), the Prague Symphony Orchestra, the Berliner Sinfoniker, members of the Freiburg Baroque Orchestra, the Berlin Singakademie and the Singakademie Frankfurt. Work on a casual basis in the Berliner Rundfunkchor and the chorus of the Staatsoper Unter den Linden has brought him together with the conductors Daniel Barenboim (Staatskapelle Berlin), Marek Janowski (Deutsches Sinfonie Orchester) and Sir Simon Rattle (Berliner Philharmoniker).

Grünwoldt has performed on numerous occasions in the Berlin Philharmonie, the Konzerthaus Berlin, and the Nikolaisaal Potsdam. As soloist he has performed with the Berlin Singakademie and the Concerto Brandenburg (Creation/Haydn), the Brandenburg Staatsorchester Frankfurt conducted by Heribert Beissel (Tosca/Puccini), with the Bach Orchestra Hannover, which specialises in original performance practice (St. John Passion/Bach), and under the direction of the Freiburg Baroque soloist Torsten Johann (Messiah/Handel).

In 2006/2007 he was engaged for the Christmas Oratorio I-VI in Berlin Cathedral (Tobias Brommann), the B-Minor Mass in the Konzerthaus Berlin (Kerstin Behnke), Brahms’ Requiem in Greifswald Cathedral (Harald Braum) and the St. John Passion in Braunschweig Cathedral (Gert-Peter Münden). In 2007 he sang the solo part in the Verdi Requiem in the Berlin Auen Church under the direction of Jörg Strodthoff with members of the Staatskapelle Berlin.

Apart from his concert performances, he takes a particular interest in the lied. In 2007 he attended a master class given by the pianist Norman Shetler in Hamburg, and received a scholarship for the Summer Academy at the Mozarteum in Salzburg. Lied cycles like Schubert’s Winterreise, Schumann’s Dichterliebe and Wolf’s Italienisches Lieberbuch are an integral part of his repertoire. In the summer of 2006, he gave his debut at the Festspiele Mecklenburg-Vorpommern as Count Peter of Provence "Die schöne Magelone" by Johannes Brahms. State Minister of Culture Hans-Robert Metelmann accompanied him as reciter. In 2007 he performed the cycle in the context of the Luxembourg City of Culture year accompanied by Gunther Emmerlich as speaker. He is also committed to the contemporary lied, giving first performances of the Huchel Lieder by the Leipzig composer Tobias Rank and works by the American composer Theodore Saunway, Berlin. In 2009 he will be giving the first performance of songs by Manolis Vlitakis based on poems by Rainer Maria Rilke.

Another of his predilections is for chamber music: at a lieder recital in St. Petersburg the idea was born for a joint concert tour with the Rimsky-Korsakov String Quartet, which brought the Russian musicians to Germany in June/July 2008.