Hi, I'm Diego Roldan

Cybersecurity Analyst focused on defense, monitoring, and incident response, with a strong interest in red team, while continuously developing secure and efficient full stack applications.
Securing systems by day, building them by passion.

Work Experience

  1. CYBERSECURITY ANALYST icon
    CYBERSECURITY ANALYST
    at nologin
    OCT 2025 - present

    Focused on Elastic Security (SIEM), designing and deploying Elastic Cloud and self-hosted environments from scratch. Developed ingestion pipelines and custom integrations, migrated legacy SIEMs to Elastic Security, performed ECE upgrades, and contributed to SOC operations through monitoring, detection engineering, and SOAR automation.

  2. SOFTWARE DIGITALIZATION ENGINEER icon
    SOFTWARE DIGITALIZATION ENGINEER
    at BSH
    FEB 2025 - OCT 2025

    Developed end-to-end software solutions using Power Platform (Power Apps, Power Automate, SQL, and Power BI) to drive the digitalization of production processes. Led the internal app development initiatives, collaborating directly with plant teams to design tailored solutions for their operational needs. Implemented automated workflows and data dashboards to enhance efficiency and enable data-driven decision-making. Additionally, conducted training sessions to upskill new users and developers in Power Platform.

Certifications

  1. Elastic Certified Engineer icon
    Elastic Certified Engineer

    APR 2026

    Validates expertise in managing and optimizing Elasticsearch environments. Covers designing and configuring indexes, executing advanced queries and aggregations, and building search applications. Also includes cluster management, backups, and cross-cluster operations for reliable, scalable solutions.

  2. Elastic Certified SIEM Analyst icon
    Elastic Certified SIEM Analyst

    NOV 2025

    Validates expertise in using the Elastic Stack for security monitoring and analysis. Covers Stack architecture, Fleet and Elastic Agents, and applying ECS. Includes creating visualizations and dashboards for security use cases, using the Security App to monitor events, analyze alerts, correlate data, and track incidents.

Write Ups

Here you can find some writeups of Hack The Box machines that I have solved. Open them to see the details of each machine, including the steps I took to solve them, the tools I used, and any challenges I faced along the way.

Tech Stack

More Projects

  1. Home Lab Setup icon
    Home Lab Setup

    I run a personal home lab on an Ubuntu Server that is powered on 24/7, hosted on an old laptop with a 4th generation Intel i3 and 4 GB of RAM. It is designed to automate tasks, host personal services, and experiment with new technologies in a controlled environment. I use Docker to manage and isolate the different services running on the system. Despite the limited hardware, the setup is optimized to be lightweight and efficient. I have also implemented an automatic backup system to protect important data. This environment allows me to continuously learn, build, and test real-world solutions.

  2. RAFT - DISTRIBUTED CONSENSUS icon
    RAFT - DISTRIBUTED CONSENSUS

    A distributed consensus algorithm that ensures that all the nodes in a cluster agree on the same value.

  3. CAR GAME ASSEMBLY icon
    CAR GAME ASSEMBLY

    A car game developed using assembly language. The user-controlled car must avoid touching the moving walls. It also supports 2 players simultaneously.

  4. ALIKE COMPILER icon
    ALIKE COMPILER

    Alike is a programming language similar to Ada. This project compiles Alike language and transforms into intermediate code which can be executed by P-machine.

  5. REFORMAS LAS CANTERAS icon
    REFORMAS LAS CANTERAS

    Website page for a small kitchen and bathroom reform company. Check their services, projects, and contact them.

  6. Finances Google Sheets + iPhone Shortcut icon
    Finances Google Sheets + iPhone Shortcut

    This project provides a simple and efficient way to track personal finances directly from an iPhone using Shortcuts. It connects securely to a home server via SSH (optionally through a VPN) to execute a Python script that logs data into Google Sheets. The system is designed to be fast, private, and fully customizable. It includes built-in error handling that stores failed entries locally on the device to prevent data loss. Users can later retry these entries with automatic field completion. The setup is flexible and can be adapted to other storage systems beyond Google Sheets.

  7. BETRIS icon
    BETRIS

    Given a list of pieces, betris solves the problem of finding a way to fill a given number of rows. Shows visualization of the process.

  8. FLEET-FEAST icon
    FLEET-FEAST

    An android app that helps a restaurant owner to manage their restaurant. Orders and plates can be added, updated and deleted.

  9. RAN - TRAVEL APP icon
    RAN - TRAVEL APP

    A travel app designed to assist older travelers. Users can book activities, tours, and more. Guides can create new activities and chat with users.