Brenda Cejas
@brendacejas
I streamline billing, administration, and client follow-up for growing teams.
What I'm looking for
At Ulmus Marketing Agency, I manage day-to-day administration, billing, payment follow-up, cash control, documentation, and reporting for a portfolio of approximately 40 clients.
I've designed and implemented three internal digital tools: an administration app, an in-house billing system, and a management platform that improved task organization, deliveries, follow-up, and communication between the creative team and clients.
As a freelance Billing Administrator for Cosmess Construction Company, I issue invoices and electronic tax receipts through ARCA, verify billing data, and organize supporting administrative records.
I bring more than three years of administrative management, customer service, billing, and process organization experience, supported by strong Excel, Google Sheets, and client coordination skills.
Experience
Work history, roles, and key accomplishments
Administrative Officer
Ulmus Marketing Agency
Jan 2023 - Present (3 years 8 months)
Manage day-to-day administrative operations, including customer service, invoice issuance, income and expense records, cash tracking, and document organization. Track payments and overdue accounts for a portfolio of approximately 40 clients, and prepare monthly and annual financial summaries using Excel and Google Sheets.
Education
Degrees, certifications, and relevant coursework
Institucion Cervantes
Higher Technical Degree, Business Administration
2025 -
Pursuing a Higher Technical Degree in Business Administration, currently in the second year.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
Skills
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