Open to opportunities

Benjamin Castillo

@benjamincastillo

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Library Media Assistant focused on customer service, documentation, and data-driven solutions.

United States

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What I'm looking for

I’m looking for a role where I can combine documentation, customer service, and analytical inventory/quality thinking with cybersecurity mindset—using automation and clear reporting to solve problems, support stakeholders, and continuously improve processes.

I’m a Library Media Assistant and solutions-oriented professional with extensive experience across customer service, documentation, sales, and inventory. In my current role (Montgomery County Public Schools), I operate the school library, support students and teachers with circulation, and obtain reference materials while supervising library activities.

I’m systematic and consistent in how I work—handling technical services like acquisitions, cataloguing, and processing of library materials, plus housekeeping tasks for maintenance and repair of the collection and audio-visual equipment. I bring a customer-service mindset and due diligence to problem-solving, informed by years of quality-focused and client-facing work.

Previously, I held quality and compliance roles at General Mills and production-related quality positions, where I kept quality control of raw materials, in-process goods, and finished products by completing micro and chemical tests for food safety. I also developed strong documentation habits for audit preparation, and I’ve managed inventory and validation workflows by inspecting arrival of ordered items, verifying standards, and maintaining electronic inventory lists.

Alongside this foundation, I’m actively building cybersecurity capability through hands-on projects and coursework. I’ve built an automated Security Operations Center threat-intelligence pipeline using n8n with URLhaus and VirusTotal enrichment, completed ISO 27001 and GDPR compliance auditing exercises, and applied cloud security remediation concepts for AWS S3 using CloudTrail, EventBridge, and Lambda—plus vulnerability assessment, network traffic analysis, and malware detonation/analysis practices.

Experience

Work history, roles, and key accomplishments

Current

Library Media Assistant

Current

Montgomery County Public Schools

May 2023 - Present (3 years)

Operates the school library and assists students and teachers with circulation and reference materials. Performs technical services for library materials, including acquisitions, cataloging, and processing, and completes routine maintenance of the collection and audio-visual equipment.

Library Circulation Reference Services Acquisition Library Processing Customer Service Record keeping Microsoft Excel Microsoft Word

Substitute Library Technician

Seven Oaks School Division

Jan 2019 - Feb 2023 (4 years 1 month)

Assisted with school library operations under the direction of the principal, supporting students and teachers in circulation and reference needs. Helped with acquisitions, cataloging, and processing of library materials and supported maintenance of the library collection and audio-visual equipment.

Library Circulation Reference Services Acquisition Library Processing Customer Support Maintenance Documentation

Store Associate

Marshalls

Jun 2018 - Feb 2019 (8 months)

Assisted customers at checkout and maintained cleanliness in assigned areas. Helped ensure floors and shelves were stocked to support store operations and customer needs.

Customer Service Cash Handling Stocking Merchandising Store Upkeep Communication Team Collaboration Problem Solving

Quality & Regulatory Technician

General Mills, Inc.

Sep 2014 - Apr 2018 (3 years 7 months)

Conducted quality control of raw materials, in-process goods, and finished products. Performed micro and chemical tests to support food safety and help prevent quality and safety hazards to sustain operations.

Food Safety Chemical Testing Quality Control Analytical Skills Documentation Risk Prevention

ISO Certification Sales Officer

TÜV Rheinland Phils., Inc.

Mar 2012 - Jul 2014 (2 years 4 months)

Sold ISO certification services to manufacturing and service sector clients by presenting certification options to prospective customers. Handled customer requests and inquiries and supported the sales process through client meetings and follow-ups.

ISO Certification Sales Lead Generation Client Inquiries Compliance Services Sales Relationship Management

Quality Assurance Technician

Sysu International, Inc.

May 2008 - Mar 2012 (3 years 10 months)

Worked as a Quality Assurance Technician at the Novaliches plant, supporting quality assurance activities. Helped maintain quality and compliance within plant operations through routine documentation and process support.

Quality Assurance Quality & Compliance Documentation Audit Readiness Process Control

Quality Control Analyst

Universal Robina Corporation

Aug 2007 - Jan 2008 (5 months)

Documented plant policies for audit preparation and supported readiness for compliance reviews. Conducted frequent GMP plant walk-throughs promoting food safety and assisted with training plant personnel on food safety policies.

GMP Food Safety Audit Preparation Policy Documentation Training Support Quality & Compliance Record keeping