Is working as an auditor at a Big 4 firm Halal income?

Salaam,

I have tried looking online and finding it difficult to find an exact answer as the topic seems rather debatable due to Riba.

I work at a Big 4 firm and only audit a specific FSLI being employee share options which does not involve interest.

Can someone advise on whether this would be a halal source of income and any evidence they have.

Thanks

@Mufti_Faraz_Adam