Why work at first bank of owasso? From competitive benefits to a friendly working environment, First Bank of Owasso can help you achieve your goal of obtaining a career, and not just a job. Please contact Human Resources at (918) 272-8252 for information about our career opportunities. First Bank of Owasso is an EEOC Affirmative Action Employer M/F/Veterans/DisabledHow do i contact firstbank customer service? Contact FirstBank customer service by phone at 1-800-964-3444 or online, to find answers to all of your banking and lending questions, product support, and more.Where is the head office of first bank of nigeria? First Bank of Nigeria Ltd. Head Office Address Samuel Asabia House 35 Marina P.O. Box 5216, Lagos, Nigeria. FirstContact Tel: +234 1 905 2326 Tel: +234 708 062 5000 Email : [email protected] Tel: +234 1 448 5500