S543 - as a qualified CA and tax specialist you can expect to be hired into similar roles for clients very similar to EY's, unless you are willing to start at the bottom with the entry level analysts / consultants. The problem is both compensation (you're probably better paid than an entry level analyst) and seniority / age. The best lateral move would be to take an MBA or masters in finance etc. then apply to as many management roles as you can. Otherwise, try and get an internal move to advisory / consulting through your EY network. Just make sure it's not grass is greener syndrome - plenty of roles have far less impact to a business than tax operations (ask the PMOs...)