Telfer's performance has been met with critical acclaim, having garnered him a Daytime Emmy Award nomination for Outstanding Supporting Actor in a Drama Series in 2020.

In 2015, Paul Telfer joined the cast of Days of Our Lives as Xander Cook, the nephew of Victor Kiriakis.

At Titan, Xander tracked down Nicole for betraying him, locking her up to die in the furnace room along with her lover Eric, who came to save her.

He worked as a gardener at the Kiriakis mansion briefly as part of the punishment where he was seduced by Theresa Donovan who falsely accused him of rape when Brady walked in on them.

As the trio are being transported with other prisoners, the three escape, and Xander heads straight for Theresa's to confront her about her false accusations.

By 2018, Xander was in Mexico selling blood diamonds to drug lord Mateo, who was holding his ex-girlfriend Theresa hostage.

A fire breaks out at the secret facility in Nashville where Xander is working with Kristen DiMera and Dr. Rolf on experiments that bring the dead back to life.

Eli Grant shows up and arrests Xander for shooting Marlena Evans but is released after the security footage is revealed to have been deleted by himself who had impersonated John Black.

He finds Sarah Horton drinking heavily heartbroken over her previous relationship with Rex Brady and being rejected by Eric.

He accepts an executive position job at Titan Industries, which Brady offers him in return that he hands over the recording and divorces Nicole.

He bonds well with Maggie Horton after he catches her drinking and opens up to her about the pain he went through as a kid when losing his parents, he stays with her until they both fall asleep on the sofa.

He then holds Ted Laurent hostage upon Kristen's orders and later on confesses the truth about Holly being alive to Eric, Sarah, and Maggie.

At Victor's request, he orchestrates a switch for Sarah's baby with Brady's daughter with Kristen DiMera (Stacy Haiduk).