2020 Doctor Nerve – LOUD (Punos Music)
MK: guitar on bonus track
2020 Mastodon – Medium Rarities (Reprise)
MK: grand piano, Moog and Mellotron on “Jaguar God (Instrumental)”
2020 MFTJ – MFTJ (Lazy Bones Recordings)
MK: Co-producer, co-writer, guitars, keys, bass
2020 Gergo Borlai – The Missing Song (Blue Canoe Records)
MK: lead guitar on “Vinnie”
2020 Chris Opperman – Chamber Music From Hell (Purple Cow Records)
MK: lead guitar on “Are We Living In A Computer Simulation?”
2020 Staring Into Nothing – Love (self-released)
MK: Guitars, synthesizer
2020 Devin Townsend – Order of Magnitude (Inside Out/Sony)
MK: guitar, keyboard, xaphoon, vocal
2020 Uncle Sammy – Unearthed (self-released)
MK: Co-producer, guitar on “In The Lab”
2021 MFTJ – My Mom’s Getting A Horse (Lazy Bones Recordings)
MK: Co-producer, co-writer, guitars, keys, bass, xaphoon
2021 Frank Zappa – Zappa ’88: The Last U.S. Show (Zappa Records)
MK: Guitar, keyboard, vocal
2021 The Android Trio – Other Worlds (Cuneiform Records)
MK: Co-producer, keys, guitar
2021 Pawlie – An Ape’s Progress (Flying Meatloaf Records)
MK: Guitars, keyboards
2021 Devin Townsend – The Puzzle (Hevy Devy Records)
MK: Guitar, keyboards
2021 Devin Townsend – Snuggles (Hevy Devy Records)
MK: Piano, string synth
2021 Kevin Gilbert – Covers (The Estate of Kevin Gilbert)
MK: Guitar, vocals
2021 The Zappa Band – Live in Saratoga Springs (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Rochester Hills (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Canandaigua (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Springfield, MA (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Washington, D.C. (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Milwaukee (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Cleveland (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Huber Heights (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Boston (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in Holmdel (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2021 The Zappa Band – Live in New Haven (Qobuz)
MK: Guitar, keyboards, vocals, kazoo
2022 Devin Townsend – Lightwork (Inside Out/Sony/Hevy Devy)
MK: Guitar solo on “Dimensions”
2022 The Bird Brain – The Bird Brain EP (Bandcamp)
MK: Guitar, vocals
2022 Ryo Okumoto – The Myth of the Mostrophus (Inside Out/Sony)
MK: Guitar on “Turning Point”
2022 Phi Yaan-Zek – Interdimensional Garden Party (PYZ Music)
MK: Guitar, vocals
2023 Mats Öberg – Visa från Inneröra (McBuddha Records)
MK: Guitar on “Dream Loops”
2023 Cécile Nordegg – No-ce chansons noce (Rossori Music)
MK: Guitars on “L’accordieniste”
2023 Devin Townsend – Devolution Series #3: Empath Live In America (Hevy Devy)
MK: Guitar, keyboard, vocal
2023 Rafa Bonilla – Alma Mater (Guitarlabs Records)
MK: Guitar on “Answer to the Ego”
2023 Mike Keneally and Marcelo Radulovich – Monday (Titicacaman Records)
MK: Bass, synths, piano, guitars, voice
2023 Mike Keneally and Marcelo Radulovich – Bask (Titicacaman Records)
MK: Guitars, piano, synths, bass, voice, percussion
2023 Steve McAllister – I Hope You Are Okay (Vari-Tone Records)
MK: Guitars, keys
2024 Mike Keneally and Marcelo Radulovich – Tuesday (Titicacaman Records)
MK: Guitars, bass, synth, piano, mellotron
2024 Bear McCreary – The Singularity (Sparks & Shadows Records)
MK: Guitars
2024 Mike Keneally and Marcelo Radulovich – Wednesday (Titicacaman Records)
MK: Guitars, bass, synth, piano, voice
2024 Devin Townsend – PowerNerd (InsideOut/Hevy Devy)
MK: Keyboard
2024 Mike Keneally and Marcelo Radulovich – Bask 2 (Titicacaman Records)
MK: Guitars, piano, synth, bass, voice, percussion
2025 Mike Keneally and Marcelo Radulovich – PM Remix (single) (Titicacaman Records)
MK: Guitars, bass, synth
2025 Mike Keneally and Marcelo Radulovich – Thursday (Titicacaman Records)
MK: Fretted and fretless guitar, bass, synth, piano, organ, bul bul
2025 Frost* – Western Atmosphere (single) (InsideOut)
MK: Guitar