Manage PPC & SEO Client Accounts

I have an active roster of paying clients whose campaigns are already running; what I need now is a reliable digital-marketing partner who can step straight in, keep everything humming, and lift results... (Budget: $250 - $750 USD, Jobs: A/B Testing, Analytics, Answer Engine Optimization (AEO), Content Marketing, Digital Marketing, Google Adwords, Internet Marketing, Lead Generation, PPC Marketing, SEO)