If your employer will sponsor you for PR (for sure), then an alternative is sponsor you first for nomination under PNP, and in that provincial nomination application request a letter of support. Once the nomination is approved, the letter of support will also be included. Use that to apply for a WP; the letter of support can be used in place of an LMIA for the WP. So while your PR application is proceeding, you can start working as soon as you get the WP.
Note however, the criteria to be eligible for provincial nomination will vary between provinces, and you must satisfy the eligibility criteria first to be able to apply for provincial nomination, even if sponsored by an employer. Also, keep in mind issuance/approval of nominations may also take some time, see if this will fit into your current deadline of April 2015.
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