Hey I am RJ

Administrative & Data Operations Specialist

Results-oriented professional with experience supporting teams and management through data organization, reporting, and operational support. Skilled in transforming raw information into accurate, well-structured outputs that improve decision-making, monitoring, and workflow efficiency.

Brings hands-on experience in data cleaning, validation, reporting, and dashboard preparation using spreadsheets and business intelligence tools. Known for improving data accuracy, reducing manual work, and streamlining processes through structured systems and documentation.

Strong background in administrative support, coordination, database management, and stakeholder communication across multiple industries. Detail-oriented, highly organized, and process-driven, with a focus on reliability, data integrity, and continuous improvement in fast-paced environments.

RJ Castillo
Quezon City, Philippines
Freelancer
Check my CV View Work Hire Me

My Skills and Competencies

Excel Expert
SQL
Power BI
Bookkeeping
Web Research
Email Management
Social Media Management
Data Entry
Calendar Management

Certificates

My Experience and Education

  • EXPERIENCE
  • EDUCATION
2021
BS – Information Technology

AMA Computer University

October 2025 - Present
Department of Agriculture
(Information System Analyst II)

Designed, developed, and optimized database queries to extract and consolidate multi-source data; improved reporting efficiency by 35% and reduced query errors by 25%, strengthening overall program monitoring accuracy.

Performed end-to-end data preparation and validation, including cleaning, transformation, and QA checks; enhanced dataset accuracy by 30% and reduced inconsistencies across sources by 40%, leading to more reliable analytics.

Developed and maintained interactive dashboards and visualizations in tools such as Power BI and Tableau; accelerated stakeholder access to insights by 50% and reduced manual reporting workload by 45%.

Conducted in-depth data analysis and delivered actionable insights, generating statistical summaries and key performance indicators; supported planning and management decisions that improved data-driven decision-making effectiveness by 35%.

Documented technical workflows and delivered capacity-building sessions, producing user guides and training materials; increased team proficiency in data querying and visualization by 60% and reduced support requests by 30%.

Jan 2025 - 2025
Energy Regulatory Commission
(Planning Officer II)

- Assist in cleaning, analyzing, and interpreting data using Looker Studio and Power BI to identify trends and provide recommendations for decision-making.
- Support the formulation and implementation of development plans, including data processing systems and dashboard updates.
- Manage data and documents for input and publication on the intranet and extranet, ensuring accuracy
and completeness.
- Perform reporting, presentation of findings, and other tasks assigned by the First Party or their authorized representative.

June 2024 - Jan 2025
Metropolitan Manila Development Authority
(Computer Operator Staff II)

Monitor and optimize signalized intersections using advanced traffic signal servers and modern workstations at the MMDA Command Center. I’m committed to ensuring smooth traffic flow and enhancing road safety throughout the city.
Handle incoming phone calls about traffic signal issues and log them for further action.
Follow up on traffic signal field facility issues with contractors and maintenance teams to ensure timely resolution.
Preparing daily monitoring reports to track and analyze traffic signal performance
Adhoc tasks

2023 - 2023
Digital Byte Financial Services Munich
(Bookkeeper - Intern)

Input and maintain information in databases, ensuring accuracy and completeness while organizing
data for easy retrieval and analysis.
Compile detailed reports outlining inventory levels, transactions, and movements, providing valuable
insights for effective inventory management and decision-making.
Generate and send invoices promptly, accurately recording sales transactions and ensuring timely
payments from clients to maintain positive cash flow.
Maintain a structured list of accounts for financial transactions, ensuring consistency and clarity in
recording and reporting financial information across the organization

2022 - 2023
Streetlink Mobile LLC
(Administrative Assistant)

Handling databases by collecting data from diverse sources such as AIOBO, Salesforce, and Saleshub.
Organizing the gathered data meticulously in a spreadsheet, enabling informed decisions by analyzing the
performance metrics of individuals and identifying areas of excellence.
Assume responsibility for inventory management, ensuring a well-stocked inventory and promptly identifying low inventory situations in various states.
Provide vital support to field representatives, addressing technical issues like phone switches and
assisting with inventory lists to ensure operational efficiency.

2020 - 2021
Insureaze
(Executive Virtual Assistant)

Specialize in selling insurance to contractors in San Francisco, USA.
Take charge of maintaining an accurate and up-to-date client database, emphasizing the importance of precision in client information.
Exhibit proficiency in appointment setting, organizing, and scheduling client meetings with my employer.
Prioritize keeping everyone on the same page to ensure seamless communication and coordination.

2019 - 2020
Different Group Glass
(Executive Virtual Assistant)

Facilitated sales of glass products in California while managing customer measurements, manufacturer coordination, and order follow-ups.
Managed email correspondence, online inquiries (e.g., Yelp), and coordinated appointments and scheduling efficiently.
Handled invoicing, collections, and ensured accurate calendar management to minimize conflicts and travel costs.
Demonstrated multitasking abilities across business operations, including email management, manufacturing coordination, and appointment scheduling.

My Services

Social Media Management

Boosting your online presence and engagement through expert social media management.

Data Entry / Web Researcher

Search the Internet for information on a wide variety of topics.

Bookkeeping

Meticulously maintain financial records, ensuring accuracy and compliance for your peace of mind

General Virtual Assistant

Virtual Assistant that provides crucial support to any business.

Executive Virtual Assistant

Executive Virtual Assistant skilled in admin support, scheduling, reports, and digital organization.

Testimonials

Author

N. Kaci

Dear Renz,
I wanted to take a moment to express my appreciation for your outstanding work with my team. You've been a key asset to our company, and I'm truly impressed by the dedication and effort you've consistently put into your role. Not only have you shown exceptional skills and professionalism, but your interactions with customers have left a lasting positive impression. I've heard nothing but praise from our customers about the excellent service and assistance you provide. Your commitment to customer service is evident, and I'm grateful to have had you on my team.


Works

Let's work together !

I am available for freelance projects.
Hire Me

Get In Touch

Address :
Quezon City,
Philippines


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