Celestino Mário
Luanda
Summary
Dynamic network engineering professional with a strong background in configuring, managing, and optimizing network systems to enhance security and efficiency. Proven ability to deliver impactful solutions that improve system performance and ensure network reliability, complemented by effective problem-solving strategies and proactive maintenance practices. Recognized for fostering a collaborative team environment and adapting swiftly to evolving technical demands, leveraging extensive expertise in network protocols, troubleshooting, and infrastructure design. Committed to driving results through a keen understanding of industry best practices and innovative approaches to network architecture.
Overview
8
8
years of professional experience
1
1
Certification
Work History
Network Engineer
Dimension Data allocated at Azule
Luanda, Angola
07.2023 - Current
- Monitored network capacity and performance to diagnose and resolve complex network problems.
- Provided network support services for devices such as hubs, bridges, routers, and other hardware.
- Provided complete end-to-end engineering and installation of route-based IP network solutions.
- The network performance was enhanced by identifying and resolving bottlenecks, optimizing configurations, and implementing best practices.
- Configuration and management of IP phones 8841, 8832, 7841, 8961, 7937, 6921, and their soft-key customization templates.
- Enhanced security by implementing firewalls, VPNs, and access control systems.
- Integrated fixed wireless connectivity into facilities requiring high-speed networks.
- Developed comprehensive documentation for network design, configuration standards, and operational procedures.
- Configured Wireless LAN Controllers (WLC) and managed their operations.
IT Manager
Joggola Ltd
Luanda, Angola
01.2023 - 06.2023
- Collaborated with other departments to help meet IT needs and properly integrate and secure systems.
- Developed and implemented measures and procedures to protect IT systems from cyber threats and data breaches.
- Conferred with executives to advise and plan for short-term and long-term IT system upgrade needs.
Network Analyst
Dimension data allocated at Chevron
Luanda, Angola
02.2022 - 12.2022
- Configuration of IP phones 795, 8961, 7937, 6921 and their Soft-key optimizations Templates.
- Configure, monitor and maintain Chevron's computer network, including hardware, software, and servers.
- Identify and resolve network issues such as connectivity, latency, and security issues.
- Work with other Chevron departments to understand their networking needs and implement solutions to meet them.
- Configure and manage switches, routers, firewalls, and other network devices.
- Provide technical support to network users and resolve connectivity and performance issues.
- Maintain Chevron's network security, including implementing security policies and threat monitoring.
- Conducted network performance tests and developed contingency plans for network outages.
- Provide regular reports on network performance and identify areas for improvements and upgrades.
Instructor CCNA and CCNP Assistant Instructor
ITEL - CFITEL
Luanda, Angola
01.2018 - 12.2021
- Promoted a positive learning environment by establishing clear expectations and maintaining consistent classroom management techniques.
- Evaluated and revised lesson plans and course content to achieve student-centered learning.
- Increased student motivation by developing engaging lesson plans. that catered to various learning styles.
- Tracked student progress, frequently checking in with struggling students and identifying root causes of problems.
- Tested students to assess progress and adapted learning plans in alignment with performance.
- Evaluated student assessments to identify areas of growth and improvement, adjusting instructional strategies accordingly.
Education
Bachelor of Science - Computer Science
Catholic University of Angola
Luanda, Angola07-2026
Skills
- Issue resolution expertise
- Network management
- Network issue resolution
- Security access administration
- Network device monitoring
- Cisco switching expertise
- Network security
- Wireless networks troubleshooting
- Network security architecture
- Firewall technology expertise
- Datacenter network implementations
- Access control management
- Security information and event management
- Vulnerability assessment
- Network security management
Certification
- Fortinet -Network Security Expert 1, (NSE1)
- Fortinet -Network Security Expert 2, (NSE2)
- Fortinet -Network Security Expert 3, (NSE3)
- Fortieth-FCP-Network Security Professional, (NSE4)
- Fortinet-FCP - FortiAnalyzer 7.4 Administrator, (NSE5)
- Fortinet- FCP FortiManager, (NSE5)
- Fortinet - Fortinet NSE 7-SD-WAN 7.2
- Windows Server 2012 R2, 2016
- CCNA-Certified Network Associate
- CCNA voice
- CCNP-350-401 Implementing and Operating Cisco Enterprise Network Core Technologies.
- CCNP- 300-410 Implementing Cisco Enterprise Advanced Routing and Services.
- Database (MYSQL)
- Cybersecurity
- Basic hydrogen sulfide training/helicopter underwater escape training
- Personal survival skills/Water survival training
- Helicopter underwater escape training
Languages
Native Portuguese
Serbian language
Advanced English
Timeline
Network Engineer
Dimension Data allocated at Azule
07.2023 - Current
IT Manager
Joggola Ltd
01.2023 - 06.2023
Network Analyst
Dimension data allocated at Chevron
02.2022 - 12.2022
Instructor CCNA and CCNP Assistant Instructor
ITEL - CFITEL
01.2018 - 12.2021
Bachelor of Science - Computer Science
Catholic University of Angola