Telecommunications Security Specialist

Whats the role?

The telecommunications security specialist is responsible for safeguarding the organization’s fixed voice and mobile communications infrastructure. This role focuses on identifying and mitigating security vulnerabilities across telecommunications platforms, implementing advanced control measures, and ensuring robust protection of telco protocols, signaling, and network services.

The specialist will play a central role in developing voice fraud prevention strategies, enhancing mobile network security, and working closely with internal teams and external vendors to maintain a secure and resilient telecommunications environment.

What Youll Do

Security Governance & Risk Management

• Assess and manage security risks across fixed voice, VoIP, SIP, SS7, Diameter, 5G, LTE, and mobile carrier integrations.
• Conduct security assessments, vulnerability analyses, and penetration tests specific to telco infrastructure and signaling protocols.
• Develop and maintain telecommunications security standards, policies, and procedures.

Voice & Fraud Prevention/Analysis

• Design and evaluate the implementation of voice fraud prevention strategies, including call authentication frameworks, anomaly detection systems, and fraud response processes.
• Work with fraud management and SOC teams to investigate incidents, contain threats, and establish preventive controls, which may include analyzing the voice traffic patterns to detect toll fraud, PBX misuse, robocalls, spoofing, and suspicious call-routing behaviors.

Mobile Network Security

• Evaluate mobile network security controls across LTE/5G, eSIM, SIM provisioning, APN configurations, and mobile device connectivity.
• Evaluate mobile carrier configurations and ensure adherence to industry best practices (e.g., GSMA, 3GPP, NIST).
• Support secure integration and deployment of mobile services across corporate networks.

Technical Engineering & Infrastructure Security

• Set the standards for securing PBX systems, SIP trunks, SBCs, VoIP gateways, conferencing platforms, and UC solutions, and lead the periodic evaluations of the compliance to these standards.
• Collaborate with network, infrastructure, and security engineering teams to enhance overall telco security posture.
• Evaluate telecommunications security logs, signaling events, and network telemetry as needed, for example, in investigations.

Vendor & Partner Coordination

• Serve as the primary security liaison with telecommunications carriers, equipment vendors, and managed service providers.
• Review vendor security practices, SLAs, and compliance requirements.
• Coordinate security updates, vulnerability patching, and incident responses with external partners.

Incident Response & Operations

• Respond to telco-related security incidents, including voice fraud, signaling attacks, SIM swap attempts, and mobile network anomalies.
• Provide expert input during investigations and ensure timely remediation.
• Collaborate with SOC in the production of (detailed) incident reports and support continuous improvement activities.

Knowledge & Experience

 

• Bachelor’s degree in information security, telecommunications engineering, computer science, or a related field.
• 2-5 years of experience in telecommunications security, mobile network security, or telco infrastructure engineering.

Skills & Abilities

• Deep understanding of telecommunications protocols:
  - Fixed voice: SIP, RTP, SRTP, VoIP, ISDN, PRI
  - Mobile: SS7, Diameter, GTP, MAP, LTE, 5G NR, VoLTE

 

Who We Are
We are the leading telecommunications company, connecting more than 40 markets in Latin America and the Caribbean with our video, broadband internet, telephony, and mobile services under the consumer brands VTR, Flow, Liberty, Más Móvil, BTC, and Cabletica. We started small, and now we’re growing. We’re excited about the future as we strive to unlock opportunities in the region

Why join us
Technology excites us enables us and drives us. We´re proud of the services we provide, the markets that we serve, and our people coming together to enhance our customers´ lives with technology so that they can connect, work, live and play without missing beat. Throughout Liberty Latin America, our passion and pride are brought to life through our shared vision to bring innovation that will create moments that matter to our customers, delivering growth in our markets with one vision, one culture, and one team.

Liberty Latin America provides equal employment and advancement opportunities to all colleagues and applicants for employment without regard to age, color, citizenship, disability or perceived disability, ethnicity, gender, gender identity or expression, genetic information, marital or domestic partner status, military or veteran status, national origin, pregnancy/childbirth, race, religion, sexual orientation, or any other category protected by federal, state, and/or local laws.

 

 

 

#LI-JC7

Knowledge & Experience

 

• Bachelor’s degree in information security, telecommunications engineering, computer science, or a related field.
• 2-5 years of experience in telecommunications security, mobile network security, or telco infrastructure engineering.

Skills & Abilities

• Deep understanding of telecommunications protocols:
  - Fixed voice: SIP, RTP, SRTP, VoIP, ISDN, PRI
  - Mobile: SS7, Diameter, GTP, MAP, LTE, 5G NR, VoLTE

 

Who We Are
We are the leading telecommunications company, connecting more than 40 markets in Latin America and the Caribbean with our video, broadband internet, telephony, and mobile services under the consumer brands VTR, Flow, Liberty, Más Móvil, BTC, and Cabletica. We started small, and now we’re growing. We’re excited about the future as we strive to unlock opportunities in the region

Why join us
Technology excites us enables us and drives us. We´re proud of the services we provide, the markets that we serve, and our people coming together to enhance our customers´ lives with technology so that they can connect, work, live and play without missing beat. Throughout Liberty Latin America, our passion and pride are brought to life through our shared vision to bring innovation that will create moments that matter to our customers, delivering growth in our markets with one vision, one culture, and one team.

Liberty Latin America provides equal employment and advancement opportunities to all colleagues and applicants for employment without regard to age, color, citizenship, disability or perceived disability, ethnicity, gender, gender identity or expression, genetic information, marital or domestic partner status, military or veteran status, national origin, pregnancy/childbirth, race, religion, sexual orientation, or any other category protected by federal, state, and/or local laws.

 

 

 

#LI-JC7

What Youll Do

Security Governance & Risk Management

• Assess and manage security risks across fixed voice, VoIP, SIP, SS7, Diameter, 5G, LTE, and mobile carrier integrations.
• Conduct security assessments, vulnerability analyses, and penetration tests specific to telco infrastructure and signaling protocols.
• Develop and maintain telecommunications security standards, policies, and procedures.

Voice & Fraud Prevention/Analysis

• Design and evaluate the implementation of voice fraud prevention strategies, including call authentication frameworks, anomaly detection systems, and fraud response processes.
• Work with fraud management and SOC teams to investigate incidents, contain threats, and establish preventive controls, which may include analyzing the voice traffic patterns to detect toll fraud, PBX misuse, robocalls, spoofing, and suspicious call-routing behaviors.

Mobile Network Security

• Evaluate mobile network security controls across LTE/5G, eSIM, SIM provisioning, APN configurations, and mobile device connectivity.
• Evaluate mobile carrier configurations and ensure adherence to industry best practices (e.g., GSMA, 3GPP, NIST).
• Support secure integration and deployment of mobile services across corporate networks.

Technical Engineering & Infrastructure Security

• Set the standards for securing PBX systems, SIP trunks, SBCs, VoIP gateways, conferencing platforms, and UC solutions, and lead the periodic evaluations of the compliance to these standards.
• Collaborate with network, infrastructure, and security engineering teams to enhance overall telco security posture.
• Evaluate telecommunications security logs, signaling events, and network telemetry as needed, for example, in investigations.

Vendor & Partner Coordination

• Serve as the primary security liaison with telecommunications carriers, equipment vendors, and managed service providers.
• Review vendor security practices, SLAs, and compliance requirements.
• Coordinate security updates, vulnerability patching, and incident responses with external partners.

Incident Response & Operations

• Respond to telco-related security incidents, including voice fraud, signaling attacks, SIM swap attempts, and mobile network anomalies.
• Provide expert input during investigations and ensure timely remediation.
• Collaborate with SOC in the production of (detailed) incident reports and support continuous improvement activities.