4 days ago
Johannesburg, South AfricaSenior
Responsibilities
- Monitor and respond to security events, manage escalations, and act as a liaison during security incidents.
- Serve as a dedicated security analyst for critical projects.
- Lead vulnerability management, including installation and patching efforts.
- Conduct security audits, penetration testing, evidence collection, and forensic analysis.
- Drive technical security tasks to completion within time and technology constraints.
- Contribute to end-user security education and awareness.
- Maintain and update the organization’s compliance posture, policies, and standards.
- Provide technical security support for client discussions and commercial engagements, including RFPs, bids, and client assurances.
- Document security testing results, audits, and posture assessments for leadership and external client assurance reviews.
Requirements
- Excellent knowledge of TCP/IP and the core Linux network stack.
- Expertise in network traffic and protocol analysis, vulnerability assessment and scanning, network service enumeration, and web application penetration testing.
- Hands-on experience developing, implementing, and auditing security baselines, configuration management controls, and patch management strategies across operating systems, applications, and data services.
- Deep knowledge of SIEM solutions and vulnerability management platforms.
- Experience implementing and managing Cisco and Checkpoint IPS systems and firewalls.
- Proficiency with DLP, endpoint protection, application control, and device control solutions, plus experience with web application firewalls and identity and access management products.
- Experience with data encryption technologies and products.
- Python and shell development experience is a plus.
- Knowledge of cloud and mobile security architecture and experience with datacenter protection strategies.
- Knowledge of ISO 27001, the NIST Cybersecurity Framework, SOC 2, and related security governance and compliance practices.
- Ability to translate technical controls and security findings into formal, auditable policies, procedures, and professional documentation.
- Strong written and verbal communication skills, including presenting technical security findings and strategy to C-level executives and external clients.
- Prior network-position experience is a plus.
- Ability to provide technical guidance to peers and meet deadlines in challenging environments.
Benefits
- Hybrid workplace in Johannesburg, South Africa.
- Full-time employment.
- Competitive base salary and benefits dependent on qualifications and skills.
- Opportunity to work with a dynamic, technically skilled, and motivated team in a fast-paced environment.
About Upstream
Upstream builds a mobile marketing automation and digital commerce platform for mobile network operators and consumer brands, combining omnichannel messaging, operator billing, and anti-fraud protection. It operates as a privately held provider of software and managed services, supporting revenue growth and customer acquisition across 45+ markets in Latin America, Africa, the Middle East, and Southeast Asia. Founded in 2001 and headquartered in Athens, Greece, it works with more than 60 mobile network operators worldwide.