At home in both opera and oratorio, Leif Aruhn-Solén has a particular interest in music from the early Baroque period through Mozart. He has sung in Rameau's Les Paladins, Monteverdi's L'Orfeo and Mozart's Zaide and recent engagements have also included Don Ramiro in Rossini's La Cenerentola at the Royal Opera in Stockholm, Rousseau's Le devin du village at the Styriarte Festival in Graz, Gassmann's L'opera Seria at the Drottningholm Theatre and the world premiere of Perez-Ramirez Rimbaud, la parole libérée at Opéra National de Montpellier. In addition he has sung the roles of Almaviva in Rossini's Il Barbiere di Siviglia, and Don Ottavio in Mozart's Don Giovanni. On the concert stage he has performed both as the evangelist and the tenor soloist in Bach's St. Matthew and St. John Passions and Christmas Oratorio. Other often performed tenor solos have included Bach's Mass in B minor, Handel's Messiah and Mozart's Requiem.

Leif Aruhn-Solén has appeared with Grand Théâtre de Genève, Théâtre du Châtelet in Paris, The Royal Opera in Stockholm, Opéra National de Montpellier, the New Israeli Opera in Tel Aviv, Glimmerglass Opera in New York, Chicago Opera Theater, Opera Theatre of Saint Louis and the Göteborg Opera. His orchestral engagements have taken him to several of the world's music centers to perform with such prestigeous orchestras as Les Arts Florissants conducted by William Christie, Freiburger Barockorchester, Il Giardino Armonico, Concert Spirituel, the Cleveland Orchestra, the City of Birmingham Symphony Orchestra, the Oslo Philharmonic Orchestra, the Jerusalem Symphony Orchestra, the Singapore Symphony Orchestra, the Belgrade Philharmonic Orchestra, the Swedish Radio Symphony Orchestra, the Gothenburg Symphony Orchestra, New Trinity Baroque, the Drottningholm Baroque Ensemble and Rebaroque.

Leif Aruhn-Solén has also recorded extensively. In 2010, a CD with Handel arias, performed together with New Trinity Baroque, was released on Edition Lilac. Other recordings include complete operas by Martín y Soler and Mazzoni on Harmonia Mundi K617, Charpentier's Judicium Salomonis on Virgin Classics and a solo CD with Swedish art songs on Sterling.

Leif Aruhn-Solén was born in Stockholm, Sweden. He studied vocal performance at the Royal College of Music in Stockholm from 1994 to 1998. In 2001, he earned the Artist Diploma from Oberlin College, Ohio.