[2] In 2018, Foster announced the release of a first solo project, Windows in the Sky, through Hopeful Tragedy Records and Sony Music / The Orchard.

[4] Alex Henry Foster was nominated at ADISQ for the first time in 2019 with his first solo effort "Windows in the Sky" for Anglophone album of the year.

[5] In 2020, Alex Henry Foster and his band The Long Shadows went on their first tour, alongside ...And You Will Know Us by the Trail of Dead, playing concerts all across Europe.

On May 1, 2020, his first solo record entitled Windows in the Sky was released worldwide, with the launching event taking place on the online portal of Prog, through the broadcast of a 60-minute concert, live from Alex Henry Foster's studio established in a former Catholic church near Montreal city.

[21] In August 2021, Foster became the owner of the Moroccan boutique hotel "La Maison de Tanger", an oasis in the heart of the old city of Tangier and sought for by an international clientele for more than two decades.

[22] On September 22, 2021, his live album Standing Under Bright Lights received an ADISQ nomination in the category "Sound Engineer of the Year", rewarding Ben Lemelin's work, Foster's longtime creative partner.

[23] On April 26, 2024, Foster released a record, called Kimiyo, written and produced alongside his longtime creative partner, Ben Lemelin and Japanese-Canadian artist Momoka.

[27] The facilities host music and multimedia studios, as well as The Fabrik, a creative group with spaces and equipments to screen-print, craft merchandising and press & cut vinyls on site.

[28] Following the loss of his father, Foster decided to leave for Tangier, Morocco in 2016, where he spent two years working on what has become his debut album Windows in the Sky, launching his solo career.

[35] In 2020, Alex Henry Foster and his band members "The Long Shadows" toured across Europe with ...And You Will Know Us by the Trail of Dead, to critical acclaim.

[39] On May 1, 2020, his album Windows in the Sky was released worldwide through a live concert from his studio-church broadcast on the online portal of the British Prog.

[40] On June 9, 2020, Alex and his bandmates broadcast a live performance of the song "Lavender Sky" from their studio-church, and cut it on vinyl, turning it into their first direct-to-vinyl creation, crafted in-house, in their own creative atelier.

[41][42] On June 26, 2020, Alex Henry Foster released a music video for the 4th single from his solo record Windows in the Sky, which was filmed in Iceland.

On August 7, 2020, Alex Henry Foster released the EP Snowflakes in July marking the end of the Windows in the Sky series.

Kimiyo is part of a project called "Voyage à La Mer", inspired by a trip that Foster made to Japan in 2010 and is composed of nine tracks on which Momoka Tobari sings and recites spoken word in Japanese.

[51] Originally set to be released on October 8, 2020, his late father's birthday, Foster took time to produce the album Standing Under Bright Lights featuring the never-released song "The Son of Hannah", during the 2020-2021 pandemic.

[47] This album was written during Foster's heart surgery recovery, alongside longtime music partner Ben Lemelin and Japanese-Canadian artist Momoka.

[67] The album is part of a four-part project called Voyage à la Mer, also including the album Kimiyo released earlier the same year, the movie Voyage à La Mer, and a series of in-public conversations and live music called Of Flashes and Other Currents.

Poets and writers such as Leo Tolstoy, Khalil Gibran, Isaac Bashevis Singer, Baudelaire, Rainer Maria Rilke, Octavio Paz, Jack Kerouac, Paul Bowles, Ernest Hemingway, and Allen Ginsberg are also part of his influences and inspirations.

He acts as an official spokesperson, a conference speaker in Canada and has hosted the Annual Youth Congress of Amnesty International, and has written a song for the release of Fred M'membe.

Following the tsunami in Japan in 2011, Foster and his bandmates from Your Favorite Enemies launched "The Hope Project" in partnership with the Red Cross and schools.

In June 2020, Alex Henry Foster launched a campaigned called "Silence Is Murder", in the face of the racial and social injustices and violence outbreaks happening around the world.