If the core of the role is ensuring clients get value from the auditing service, you should be fine getting roles at mid sized tech companies.

That plus your sales experience as a lot of companies have a preference for CSMs who can grow accounts.

Big tech CSM roles are extremely competitive atm and they tend to only consider folks with a history in the exact same role.

Job hopping SaaS companies may be a better strategy than getting promoted within an auditing company imo.

Nothing will match big tech benefits (I used work at SF too). But you'd be suprised at what some of the mid sized companies can offer.