Jeffrey Walker (born 25 March 1969) is a bass guitarist, vocalist from Windle, St Helens, UK.
 He is best known for his work with death metal band Carcass for which he is also the main lyricist.
 Before Carcass, he played in the hardcore punk band Electro Hippies.
 After the demise of Carcass, he went on to form hard rock band Blackstar with two former Carcass bandmates.
 In some territories the band was called Blackstar Rising.
Mikko Viljami Lindström (born August 12, 1976), more commonly known as "Linde", is a Finnish musician and songwriter.
 He is best known as the guitarist of the Finnish gothic rock band HIM.
 The band have released eight studio albums, and are one the most commercially successful Finnish bands of all time, with several gold and platinum albums and singles.
 Lindström has also three studio albums with his own band Daniel Lioneye, formed in 2001.
 Aside from HIM and Daniel Lioneye, Lindström has also recorded with Jeffrey Walker, Manna, as well as the supergroup WhoCares.
Welcome to Carcass Cuntry is a country metal album by Jeffrey Walker, of the metal band Carcass.
 The instrumentation is performed by notable heavy metal musicians, including Faith No More’s Billy Gould, H.I.M.‘s Ville Valo, Anathema’s Danny Cavanagh and Carcass members Bill Steer and Ken Owen.
 The album cover is by Larry Welz, the creator of "Cherry".
"The Big Guns" is the twelfth episode of the sixth season of the American sitcom "Modern Family", and the series' 132nd episode overall.
 It originally aired on January 14, 2015.
 The episode was written by Vali Chandrasekaran and directed by Jeffrey Walker .
Mark Hunter (born May 26, 1977) is an American musician and photographer and is the vocalist for the heavy metal band Chimaira.
Ali's Wedding is a 2017 Australian romantic comedy feature film from Matchbox Pictures.
 It is directed by Jeffrey Walker and written by Osamah Sami and stars
Jeffrey Walker (born 10 July 1982, in Melbourne) is an Australian television actor and director, best known to the Australian public for his appearances as a child actor in "Ocean Girl" and "Round the Twist".
 He moved on to direct episodes of Australian soaps "Neighbours", "Home and Away", and "".
 He is married to American born Australian actress Brooke Harman-Walker; together they have two sons, Boston Scott Walker (b. 24 June 2013) and Ace Jackson Walker (b. 24 June 2015)
"The Day Alex Left for College" is the second episode of the seventh season and the 146th episode overall of the American sitcom "Modern Family".
 It aired on September 30, 2015 on American Broadcasting Company (ABC).
 The episode is directed by Jeffrey Walker and written by Danny Zuker.
Thunderstone is an Australian children's science fiction television series produced by Jonathan M. Shiff Productions set in a post-apocalyptic world after Earth is hit by a comet.
 The main character Noah is played by Jeffrey Walker (also known for his roles in "Ocean Girl", "The Wayne Manifesto", and "Mirror, Mirror").
 Other actors who appear in the series are Gerard Kennedy, Christopher Elliott (who later appeared in "Under Jakob's Ladder"), Emily Browning (who later appeared in "Lemony Snicket's A Series of Unfortunate Events"), and Daniel Daperis.
Jack Irish is a television drama series and a series of Australian television movies adapted from the detective novels by Peter Temple.
 The series stars Guy Pearce in the lead role of Jack Irish, a former criminal lawyer turned private investigator and debt collector.
 The novels have been adapted by screenwriters Andrew Knight and Matt Cameron, and directed by Jeffrey Walker (the telemovies) and Kieran Darcy-Smith (the series).

Question: What job/title do Mark Hunter and Jeffrey Walker have in common?
Answer: vocalist