Gerald Thomas Sievers, best known as simply Gerald Thomas (born July 1, 1954, New York City) is a theatre and opera director and playwright who has spent his life in the United States, England, Brazil and Germany. After graduating as a reader of philosophy at the British Museum Reading Room, Thomas began his life in the theater at Ellen Stewart's La MaMa E.T.C. in New York City. During this period Thomas became an illustrator for the Op-Ed page of the New York Times while conducting workshops at La MaMa E.T.C. where he adapted and directed world premieres of Samuel Beckett's prose and dramatic pieces.

In the early 80s, Thomas began working with Beckett himself in Paris (after a lot of correspondence between them for almost two years), adapting new fiction by the author. Of these, the more notorious were All Strange Away and That Time starring the Living Theatre founder, Julian Beck in his only stage acting role outside of his own company.

In the mid-80s, Thomas became involved with German author Heiner Müller, directing his works in the US and Brazil, and began a long-term partnership with American composer Philip Glass.

In 1985 Thomas formed and established his Dry Opera Company, in São Paulo. It performed in 15 countries up until 2008 (see list of works below).

In 2000, Thomas created the theatrical production Nietzsche Contra Wagner a collaboration with Slovenian composer Borut Kržišnik. They worked together again on the 2004 performance Anchorpectoris – United States of the Mind.

In 2009 he wrote a manifesto declaring his "goodbye-to-theater" yet, in 2010, Thomas announced to Stage News that he was to set up his Dry Opera Company in London. Its first production, "Throats," written and directed by Thomas, began performances at the Pleasance Theater in Islington on Feb. 18, 2011.

In 2016, Thomas's autobiography "Between Two Lines" or "Entre Duas Fileiras", was released by Grupo Editorial Record. The blurb on the back cover was by Oscar Nominee and Golden Globe winner Fernanda Montenegro (and protagonist of Thomas's "The Flash and Crash Days") writes : "Gerald Thomas exists by virtue of his devastating quality, his inconstancy, his nonconformity, his aggressiveness, his faith laden disbelief, his life affirming death cult; through his clear and powerful incongruence; by laughing and crying like an innocent and somehow ominous child, by loving the neighbor he hates; by being an unexpectedly good, adorable boy and friend; by accepting and forswearing you in seconds; by loving you madly, by cursing you while blessing you; for his devilish, eternal and nonconformist Art is monstrously creative. His Art is unique upon our stages and in our lives. If you have seen or experienced it, it will remain unforgotten."

On November 11, 2017, Thomas opened his new production “Diluvio” at SESC Anchieta- Consolação, in São Paulo, Brazil, after a three-year absence from the theater. Cast: Maria de Lima, Lisa Giobbi, Julia Wilkins, Ana Gabi, Beatrice Sayd, Isabella Lemos, André Bortolanza, Ronaldo Zero, Wagner Pinto and Dora Leão.

Supreme Court Case In August 2003, Thomas directed a performance of Tristan und Isolde at the Teatro Municipal do Rio de Janeiro, the city's main opera house. It was a nontraditional production in that the action was set in the office of Sigmund Freud—himself a character on stage, tossing cocaine in the air at one point—and made references to drug trafficking and violence in Rio. During the curtain calls following one performance, the audience spared the cast but jeered at Thomas. In response, he turned his back to them and lowered his pants and underwear, mooning the audience and simulating the act of masturbation.

The Rio de Janeiro chief of police, who was in the audience that evening, filed a report against Thomas under Article 233 of the Brazilian Penal Code, which criminalizes "carrying out an obscene act in a public place, or in a place open or exposed to the public" and prescribes a sentence of three months to one year of imprisonment. After Thomas refused an attempt by the Rio de Janeiro state prosecutors to settle the case out of court by paying a fine, his formal indictment was approved by the Rio de Janeiro Court of Justice.

The following year, the Supreme Federal Court accepted and ruled on a petition for habeas corpus in favor of Thomas, granting it on 17 August 2004 and ordering the dismissal of the criminal case against him. The petition was decided by a five-member panel of the court. Justice Joaquim Barbosa recused himself on the grounds that he had not attended the session during which the case was presented. Justices Carlos Velloso and Ellen Gracie voted to deny the request; justices Gilmar Mendes and Celso de Mello voted to grant it. As the vote was 2–2, Mello, the panel's chair, applied Article 150, paragraph 3 of the Supreme Federal Court's internal rules, which state that in the event of a tie in a habeas corpus decision, the ruling should favor the beneficiary.

In his vote in favor of the petition, Justice Mendes argued that the context of the act should be considered—a reaction to a dissatisfied audience after a theatrical performance—and thus unlikely to have offended the public's sense of decency. "An objective analysis of the dispute," he wrote in his vote, "must indicate that the matter is entirely within the scope of freedom of expression, even if inappropriate or ill-mannered." He also noted that modern society possesses mechanisms to address such situations, rendering criminal prosecution unnecessary.

Justice Mello, also voting in favor, argued that the established legal interpretation of Article 233 of the Penal Code required that the alleged lewd act should be sexual in nature. Noting that the concept of lewdness varies with time and location, and that he would "tend to recognize it as more a manifestation, albeit rude, of [Thomas's] freedom of expression in reaction to the jeers".

In her vote against, Justice Gracie cited the example of Victor Hugo, who "adopted an attitude of humility in face of those who, at the time, failed to comprehend the innovations brought on by his creations".

Works 2025 November - Opened his own play “SABIUS, os MOLEQUES” at SESC 14BIS starring Fabiana Gugli, Jefferson Schroeder, Apollo Faria, Nilson Muniz and Pedro UInio, on November 26. In the middle of November, Thomas headed up north towards Teresina, state of Piaui to direct the 40th anniversary of the Theater Company “HAREM”, in a collage of their historical plays named “HAREM CONTA HAREM” at Theatro 4 de Setembro. This group bears the legacy of the founding father of the Tropicalista movement, Torquato Neto. He also conducted a 5-day workshop in São Luis, state of Maranhão, in Brazil's oldest theater, Theatro Arthur Azevedo before returning home to New York on Christmas Day. October - Directed and adapted “Searching for Signs of Intelligent Life in the Universe” by author Janet Wagner, starring Danielle Winits on October 2 at the Copacabana Palace Theater, Rio de Janeiro.Danielle Winits se junta a Gerald Thomas no teatro para fugir do papel de 'loira sexy': 'Tive que furar essa bolha' Conducted two open readings of his own play, written specifically for Ana Cecilia Costa at the Instituto Brasileiro de Teatro in São Paulo on October 28 and 29. 2023 18 November - “TRAIDOR” opened at SESC Vila Mariana São Paulo to a fully sold-out run thru the end of December. Thomas's play written specifically for actor Marco Nanini is already considered to be his “scandalous success” on all levels; political, social, ethical and, of course, theatrical. 2022 F.E.T.O. (Fetus) opened on July 26, 2022. It is Thomas's second play to have opened in 2022. “G.A.L.A” (a solo written for Fabiana Gugli) opened at the Curitiba Theater Festival in March 2022. F.E.T.O. is conceived and directed by Gerald Thomas and loosely based on “Doroteia” (1949), a play by Nelson Rodrigues, Lights are by Wagner Pinto, Music by Jørgen Teller, Ale Martins and Eduardo Agni. Cast: Lisa Giobbi, Fabiana Gugli, Rodrigo Pandolfo, Bea Sayd, Ana Gabi and Raul Barretto. Produced by Dora Leão (PlatoProduções) presented by SESC- SP. On March 29, 2022, Gerald Thomas's “G.A.L.A.” live version for the stage opened the 30th anniversary Curitiba Theater Festival, Brazil with a sonorous 6 minute standing ovation. “Blog do Arcanjo” wrote: “Gerald Thomas – assumes himself as a wandering Don Quixote in these fleeting, highly digitized contemporary times. His “G.A.L.A.” starring Fabiana Gugli is a brilliant synthesis of time, so necessary in this increasingly impatient world. Gerald Thomas knows like no one else how to stage highly impactful images leading up to glorious moments of pure sensitivity and outright destruction, thus sharing with the public an incessant search for some sense.”

2021 In 2021, a movie version of “Terra em Transito” aired throughout the months of April and May. Gerald Thomas is strongly engaged in working within the virtual platform, given the uncertainties of the future.A historical live streamed talk with CUNY in June, made that point very clear. In September 2021, Thomas also world premiered his new “G.A.L.A.” (a movie/ play streamed online via SESC - SP). “G.A.L.A.” was written and performed by Fabiana Gugli.

2020 In 2020 Gerald revisited his production from 2006, “Terra Em Transito” (Earth in Trance), which very successfully began this COVID-19 related need for live streaming theatrical works. This version was a SESC-SP production. He also took part in over 20 live streamed interviews, conferences and workshops. His lifetime achievement television came in August with the broadcasting of his life in “Persona Em Foco”, by TV Cultura, São Paulo.

2019 In December 2019 Gerald Thomas launches a compilation of 24 of his plays staged worldwide (“Circo de Rins e Figados”) published by SESC Editions in São Paulo and in Rio. This book is partially bilingual.

2018 On November 24, 2018, Gerald Thomas opened S.O.L.O. at the Dansekapellet in Copenhagen, Denmark. This piece was commissioned by composer Jørgen Teller and performed by Gerald himself plus partner Lisa Giobbi. It was to be a brief staged reading (a reduced compilation from his autobiography Between Two Lines), but turned out to be a full evening of drama, comedy and dance thanks to this partnership with Lisa. Lighting was done by Gerald's long term lighting designer Peter Glatz (Danish).

2017 On November 11, 2017, Gerald Thomas opened his new production “Diluvio” at SESC Anchieta- Consolação, in São Paulo, Brazil

2016 In 2016, Thomas's autobiography "Between Two Lines" is released by Grupo Editorial Record. The blurb on the back cover is by Oscar Nominee Fernanda Montenegro writes: "Gerald Thomas exists by virtue of his devastating quality, his inconstancy, his nonconformity, his aggressiveness, his faith laden disbelief, his life affirming death cult; His Art is unique upon our stages and in our lives. If you have seen or experienced it, it will remain unforgotten."

2014 On April 10, 2014, Gerald Thomas premiered his "Entredentes" at SESC-Anchieta (São Paulo), featuring Ney Latorraca, Edi Botelho and Maria de Lima. According to Folha de S.Paulo, this marks the rebirth of GT as a great author and director. "Entredentes" features new music by Philip Glass and compositions by GT himself. In October of the same year, Entredentes opened at Teatro SESC Rio Ginastico, Rio de Janeiro.

2013 Launched two books: "Scratching the Surface " (Arranhando a Superficie) - of drawings and paintings and "Citizen of the World" (Cidadão do Mundo) a biography published by Coleção Aplauso.

Sexually assaulted a reporter, Nicole Bahls, at a book signing in Leblon, south of Rio.

2012 Toured "Gargolios 2.0" with the London Dry Opera Company to the Curitiba International Theater Festival and did a two-week-long workshop for professional theater people at Teatro Poeira, Rio de Janeiro.

2011