An online computer system is configured to receive requests from seekers for products or services and to provide the seekers and products a place to complete work once connected. The computer system searches through personal contacts of the seekers for trusted providers of the product or service request based on their proximity to the seekers. The computer system is configured to search through contacts within referral networks of the personal contacts for level-1 and level-2 providers of the product or service request. The level-2 providers might be more reliable because they are referred through the personal contacts of the seekers. The providers and referral contacts of the referrals can be rated and then provider candidates ranked according to the associated provider and referral ratings.