Network Secutiry Engineer

BRA - Virtual - Brazil

Transaction Network Services

Discover TNS global connectivity and infrastructure-as-a-service solutions for your mission-critical transactions.

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An extraordinarily talented group of individuals work together every day to drive TNS' success, from both professional and personal perspectives.  Come join the excellence!


The Network Security Engineer is responsible for the configuration, monitoring, management, and troubleshooting of firewalls. They will act as liaison with local region network engineering and technical support groups to assist and lead (where applicable) in the reviewing, design and deployment of new services, review existing services and migration of services/systems. Day to day duties will be assigned by monitoring of the Remedy ticket queue. All work must be completed following TNS Security policies and payment industry standards as well as the promotion of security best practices, to allow TNS business to operate and communicate in a secure solution.



Essential responsibilities include:

  • Function as an internal consulting resource on network security issues specifically firewall technologies. Such as Next Generation Firewall (NGFW), Unified Threat Management (UTM): Cisco ASA, Fortinet and Juniper SRX.
  • Familiar with implementing firewall security policies.
  • Day to day responsibilities to include standard change control, troubleshooting issues, configuration, monitoring, and management of firewalls in conjunction with TNS Security/Network engineers and vendor-provided support.
  • Monitor ticket queue application for Firewall Operations trouble tickets for incidents and creation of change requests.
  • Performs recurring maintenance activities such as device upgrades and patches with primary focus firewalls and on perimeter devices.
  • Be the lead technical resource on projects requiring firewall support including end of life hardware replacement, customer and migrations and buildout of new PoPs.
  • Participate in the Network Security on-call rota to ensure that out of hours incidents are responded to in a timely manner.
  • Produce technical process documentation for use within the department.
  • Provide training and knowledge sharing with the rest of the department where required.
  • Be the focal engineer with the Network Security team for the Financial Services Division (FSD)
  • Managing key relationships with security partners and other internal departments.
  • Governing certification, adherence and compliance to all security requirements as required by TNS.
  • Understand and keep up to date with the latest security issues.
  • Sponsorship and execution of technology & security advancements.
  • Ensuring production systems are secure, up to date and vulnerabilities managed in a timely and effective manner.
  • In-depth operational and technical knowledge of cybersecurity concepts including, but not limited to Security, Information, and Event Monitoring (SIEM) tools
  • Working closely with the Director, Security Engineering and other team members on various projects in the Global IT Security department and escalating security issues to the relevant senior members
  • IPS/IDS technologies; Signature and pattern-based intrusion detection and prevention systems: Sourcefire and Fortinet.
  • VPN Technologies; IPSEC client & L2L tunnel, SSL client and clientless connectivity.
  • Follows documented processes, procedures and policies and maintains documentation related to work area and routinely updates architecture diagrams using Visio.
  • Some travel to client sites, conferences, and other events may be necessary.


  • Experience in creating policies in and managing Cisco Identity Services Engine (ISE).
  • Hands on experience in computer routing and networking, especially with firewall technologies.
  • Hands on experience with multi-context firewall implementation (Cisco, Fortigate and Juniper).
  • Must have networking TCP/IP routing protocol experience.
  • Experience analyzing and troubleshooting Access Control Lists (ACLs) and VPN tunnels on firewalls.
  • Experience with firewalls, remote access VPN implementation, troubleshooting, and problem resolution is desired.
  • Experience with Cisco ACS, ISE.
  • Security and networking certifications from organizations such as Cisco, Fortigate and/or Juniper.


  • Appropriate Bachelors level qualification or 5+ years of experience in relevant positions.



  • Healt  insurance;
  • Dental plan;
  • Life insurance;
  • Meal/Food voucher;
  • Gympass
  • Totalpass;
  • LinkedIn Learning;
  • EAP – Employee Assistance Program;
  • Scout – Referral Program;
  • Birthday Day Off;
  • Career Mentoring;
  • Connect with HR;
  • Wedding gift.

If you are passionate about technology, love personal growth and opportunity, come see what TNS is all about!

TNS is an equal opportunity employer. TNS evaluates qualified applicants without regard to race, color, religion, gender, national origin, age, sexual orientation, gender identity or expression, protected veteran status, disability/handicap status or any other legally protected characteristic.

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* Salary range is an estimate based on our InfoSec / Cybersecurity Salary Index 💰

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Tags: Compliance Firewalls IDS Intrusion detection IPS Monitoring Network security NGFW SIEM Sourcefire TCP/IP VPN Vulnerabilities

Perks/benefits: Career development Conferences Fitness / gym Insurance Team events

Regions: Remote/Anywhere South America
Country: Brazil

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