Celestino Mário
Network Engineer
Luanda,LUA
Summary
Professional with strong background in network engineering, bringing practical experience and ability to deliver impactful solutions. Skilled in configuring, managing, and optimizing network systems with focus on security and efficiency. Known for fostering team collaboration and adaptability to meet changing demands. Reliable and results-driven with keen understanding of network protocols, troubleshooting, and infrastructure design.
Overview
8
8
years of professional experience
18
18
Certifications
3
3
Languages
Work History
Network Engineer
Dimension Data allocated at Azule
04.2024 - 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.
- Improved network performance by identifying and resolving bottlenecks, optimizing configurations, and implementing best practices.
- 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.
Network Engineer
Dimension Data Angolan
04.2022 - Current
- Managed, tracked, and coordinated problem resolution and escalation processes.
- Trained junior engineers on industry best practices, fostering a collaborative team environment that prioritized knowledge sharing.
- Evaluated emerging networking technologies to identify infrastructure improvement opportunities.
- Boosted system availability by conducting regular maintenance tasks, including firmware updates and hardware replacements.
- Implemented WAN and LAN designs in multi-datacenter configurations.
- Installed, supported and maintained company hardware and software infrastructure according to best practices.
- Planned implementation of network enhancements and upgrades.
- Collaborated with engineering to report issues, manage project deliverables and provide status reports.
- Oversaw development and maintenance of computer systems, server upgrades and operating systems.
- Checked rigorous application of information security policies, principles and practices for continuous delivery of network services.
IT MANAGER
JOGGOLA LTD
01.2023 - 04.2023
- al efficiency.
- Managed vendor relationships for hardware, software, and services procurement, ensuring quality products at competitive prices.
- 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.
- Led a skilled IT team in providing exceptional technical support, fostering a collaborative environment that promoted professional growth.
Network Engineer
Dimension Data Angola
01.2022 - 01.2023
- Optimized routing protocols to improve data transfer speeds across the organization''s network infrastructure.
- Delivered end-user support by troubleshooting connectivity issues and providing guidance on proper usage of networking equipment.
- Created VPN infrastructure and allowed for secure remote connections.
- Assisted with implementation and support of network monitoring tools.
- Managed vendor relationships to negotiate contracts, procure equipment, and receive timely technical support when needed.
- Developed and wrote recommendations for departmental policies, procedures, technical standards and guidelines.
Network analyst
Dimension data allocated at Chevron
03.2022 - 12.2022
- Configuration of IP phones 7945,8961,7937,6921 and their Softkey customizations 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.
Tutor
01.2022 - 02.2022
- Collaborated with students to complete homework assignments, identify lagging skills, and correct weaknesses.
- Provided one-on-one tutoring sessions, tailoring instruction to meet the specific needs of each student while promoting independent learning skills.
- Tutored diverse groups of students to strengthen subject comprehension, boost confidence, and build important learning skills.
- Established positive relationships with both students and parents, fostering open communication regarding academic progress and goals.
Instructor CCNA and CCNP Assistant Instructor
ITEL – CFITEL
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, Angola 04.2001 -
Skills
Issue resolution expertise
Network management
Network issue resolution
Security access administration
Network device monitoring
Layer-2/3 protocols
Cisco switching expertise
Network security
Wireless networks troubleshooting
Network security architecture
Firewall technology expertise
Datacenter network implementations
Certification
Fortinet -Network Security Expert 1 (NSE1)
Accomplishments
- Resolved product issue through consumer testing.
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Timeline
Network Engineer
Dimension Data allocated at Azule
04.2024 - Current
IT MANAGER
JOGGOLA LTD
01.2023 - 04.2023
Network Engineer
Dimension Data Angolan
04.2022 - Current
Network analyst
Dimension data allocated at Chevron
03.2022 - 12.2022
Tutor
01.2022 - 02.2022
Network Engineer
Dimension Data Angola
01.2022 - 01.2023
Instructor CCNA and CCNP Assistant Instructor
ITEL – CFITEL
01.2018 - 12.2021
Bachelor of Science - Computer Science
Catholic University of Angola
04.2001 -