Philip Lem

 is a Powder Ganger living in Vault 19 in 2281.

Background
Philip Lem was an integral part of the NCR breakout, but believes the Powder Gangers should turn themselves back in since the gang won't be able to sustain themselves much longer.

Quests

 * Why Can't We Be Friends?: After planting the C-4 on the Microcline rock, Philip asks you to talk to Papa Khan to secure their alliance.

Effects of player action

 * As a member of the Powder Gangers, Lem will be hostile if the player's reputation with the gang is negative. (This is simply not true. As mentioned in the article regarding the quest 'Why Can't We Be Friends?', none of the escaped convicts are flagged as Powder Gangers, thus your reputation with that faction has no bearing and they will not become hostile until you take an aggressive action against them directly.)

Appearances
appears in Fallout: New Vegas.