Tyna Serrano
@tynaserrano
Experienced credit, collections, and billing manager focused on cash-flow optimization.
What I'm looking for
I am an experienced Credit Collection and Billing Manager with a long track record of leading collections, credit analysis, and billing operations to maintain strong cash-flow metrics. I have consistently kept Days Sales Outstanding (DSO) well-managed and have overseen full-cycle collections across multiple business units.
I have led accounting software upgrades and conversions, implemented DSO reduction strategies, and trained staff in collections and billing best practices. I collaborate closely with sales, finance leadership, and external agencies to resolve client account issues, administer contract billing, and ensure compliance with client portal submission requirements.
My hands-on experience spans managing credit holds, processing credit card payments, reconciling client accounts, and performing credit risk assessments. I bring practical expertise in cross-functional coordination, confidential data protection, and improving billing and cash application processes to support organizational financial health.
Experience
Work history, roles, and key accomplishments
Credit/Collection and Billing Manager
1105 Media, Inc.
Jul 2011 - Present (14 years 7 months)
Manage Credit, Collections, and Billing departments across the organization, leading accounting software upgrades and maintaining DSO at 34 days while overseeing full-cycle collections and credit card payments.
Sr. Accounts Receivable Supervisor
Great American Marketing
Jun 2005 - Jun 2011 (6 years)
Reconciled client accounts and managed cash application, processed credit applications and journal entries, administered contract pricing and resolved chargebacks to improve AR accuracy and cash flow.
Credit Representative
Coca-Cola Enterprises
Oct 2003 - May 2005 (1 year 7 months)
Managed customer invoicing, collections, and credit issuance while analyzing financial documents and processing credit applications to support billing integrity and receivables management.
Credit/Collection Clerk & Credit Analyst
Precision Dynamics Corporation
Aug 1996 - May 2003 (6 years 9 months)
Handled collections and cash application for medical supply accounts, conducted trade/bank reference checks, processed chargebacks and RMAs, and prepared reconciliations and deposits.
Education
Degrees, certifications, and relevant coursework
Glendale Career College
Associate of Arts, Accounting
Completed an Associate of Arts in Accounting with coursework focused on accounting principles and practical bookkeeping skills.
Availability
Location
Authorized to work in
Job categories
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