Ramdan Tama Greslan

Experience

• 

  PT. Dima Indonesia (Dima Group)

  Dec 2015 - Jan 2020

  Cashier Finance Administration

  • Responsible for all incoming and outgoing payments.• Receive and examine the accuracy of cash and cheque/giro received from collectors.• Monitor and create daily reports of cash sales, cheque/giro, and bank sales, including handling the company's daily expense reimbursement.

• 

  PT Konishi Lemindo Indonesia

  Jan 2020 - Jun 2025

  Finance and Treasury

  • Recording and documenting all financial transactions accurately, including ensuring the correctness and completeness of cash and bank expenditure vouchers.• Handling payments according to due dates and payment schedules, including conducting payment transactions through internet banking for process efficiency.• Conducting thorough examination and resolution of advances, ensuring no discrepancies between bank statements and system records, especially during daily and month-end closings.• Monitoring and managing operational branch financing, including reviewing and processing fund requests from branches.• Preparing bank reconciliations at the end of each month and ensuring all bank statements are filed comprehensively every month, maintaining the accuracy and organization of financial documentation. Show less

• 

  RevoU

  May 2023 - Jan 2024

  Created a dashboard to monitor the efficiency and effectiveness of ads performance at Zurich Insurance :• Utilized SQL to extract and aggregate ad performance data from multiple sources.• Employed Python for data cleaning and preprocessing, ensuring accuracy and consistency.• Visualized key metrics and KPIs using Tableau/Looker, enabling stakeholders to track campaign effectiveness in real-time.• Applied descriptive statistics and trend analysis to interpret ad performance over time.Conducted exploratory data analysis (EDA) on ads performance to enhance brand visibility and attract potential customers at Zurich Insurance:• Queried and merged large datasets using SQL to identify key variables influencing ad performance.• Implemented Python for data wrangling, exploratory analysis, and feature engineering.• Created detailed visualizations in Tableau/Looker to identify patterns, correlations Show less

  • Data Analyst Associate

    Sept 2023 - Jan 2024

  • Data Analytics Bootcamp Trainee

    May 2023 - Jan 2024
• 

  PT Trans Antar Nusabird - Cititrans a Member of Bluebird Group

  Jul 2025 - now

  Operations Data Analyst

  • Analyze operational data to identify bottlenecks, trends, and opportunities for process improvement• Design dashboards and KPI reports to support data-driven decision-making• Clean, validate, and manage data to ensure accuracy and consistency for analysis• Support business strategies through impactful data storytelling that drives process and performance outcomes