Question: What job do both  Alex Greenwald and London LeGrand have in common?

Context paragraphs:
Alex Greenwald: Alexander "Alex" Greenwald (born October 9, 1979) is an American musician, actor, and record producer.  He is best known as the lead singer of the California rock band Phantom Planet.

Phantom Planet: Phantom Planet is an American rock band from Los Angeles, formed in 1994.  The band consists of Alex Greenwald (vocals, rhythm guitar), Darren Robinson (lead guitar), Sam Farrar (bass guitar) and Jeff Conrad (drums).  The band is best known for its track "California", which became the theme song for the TV series "The O.C.".  The band featured actor Jason Schwartzman on drums until 2003 and continued to release well-received albums in his absence.

Exit Music: Songs with Radio Heads: Exit Music: Songs with Radio Heads is a tribute album to British band Radiohead released in 2006 on Rapster Records and Barely Breaking Even Records.  The album features reworked songs from Mark Ronson, Alex Greenwald of Phantom Planet, Sia, Matthew Herbert, Sa-Ra, The Cinematic Orchestra, RJD2 and many others.

Brides of Destruction: Brides of Destruction was a short-lived American hard rock supergroup from Los Angeles, California, formed in 2002.  The band's last lineup consisted of singer London LeGrand (vocals), Tracii Guns (lead guitar) and Scot Coogan (drums, percussion).  Previous members of the band were Nikki Sixx (bass), Kris Kohls (drums), Adam Hamilton (keyboard), John Corabi (rhythm guitar), Scott Sorry (bass) and Ginger (rhythm guitar).

Yo (album): Yo is the debut solo studio album by Alex Greenwald.  It was released on May 5, 2014.

Phases (band): Phases (formerly known as JJAMZ and pronounced "juh-jamz") is an American indie pop band from Los Angeles, California composed of Jason Boesel (Rilo Kiley/Bright Eyes/Conor Oberst and the Mystic Valley Band), Alex Greenwald (Phantom Planet/Blackblack), Michael Runion, and Z Berg (The Like).

Let the Truth Be Known: Let the Truth Be Known is the debut album by hard rock supergroup Souls of We released on May 27, 2008 via the group's official website with the first 1000 copies, with blues musician Robert Johnson inspired album artwork, signed by members London LeGrand and George Lynch.  The album was later released on November 4 of the same year, through Shrapnel Records, under the moniker "George Lynch's Souls of We" with new album artwork, a rearranged track listing as well the additional track "Nork 13".  The album was self-produced in various studios around Los Angeles and mixed by Mudrock, who has work with bands such as Avenged Sevenfold and Godsmack.

Mock interview: A mock interview is an emulation of a job interview used for training purposes.  The conversational exercise usually resembles a real interview as closely as possible, for the purpose of providing experience for a candidate.  It can help a job applicant to understand what is expected in a real job interview, and can help an applicant improve his or her self-presentation.  Mock interviews can be videotaped; the candidate can view the tape afterward, and get feedback.  There are coaches who can provide feedback on aspects of the interview process.  Mock interviews are most common for job interviews, but may also be used to train public figures to handle interrogations by journalists, as well as help candidates for office prepare for debates.  Some organizations schedule mock interview events to help many students prepare for job interviews.  For example, some schools have mock interview training days, often organized by career and guidance counselors.  While the usual sense of the term is an exercise done as a form of preparation prior to applying for jobs, there is another sense of the term which describes a playful or non-serious interview.  Mock interviews can help a person gain confidence for real interviews, as well as provide the interviewee with information about how to handle an upcoming interview.

London LeGrand: Edward "London" LeGrand born 30 July 1966.  Is an American musician, lyricist, and vocalist best known for his time with hard rock supergroup Brides of Destruction with Nikki Sixx of Mötley Crüe and Tracii Guns of L.A. Guns.  After the group went on hiatus he formed another band with George Lynch of Dokken and Lynch Mob fame called Souls of We releasing their debut album "Let the Truth Be Known" in 2008.  He also has a side-project named Rockstars on Mars whose demos can be heard on the band's Myspace page.

Souls of We: Souls of We (also known as George Lynch's Souls of We) is an American hard rock supergroup from Los Angeles, California, formed in 2007.  The lineup consists of London LeGrand (vocals), George Lynch (guitar) and Johny Chow (bass).  Since 2009, Jordan Mancino has been the band's drummer, replacing Yael.

Supporting paragraphs: Alex Greenwald London LeGrand
Answer: musician