Carlos Malian
Lead Security Engineer @ Wellhub
About
Cloud Security Engineer and Security Operations Leader with 15+ years of experience across Cybersecurity, Cloud Security, Networking, SOC Operations, and Telecommunications. Proven expertise securing global-scale environments across AWS, Azure, and GCP, leading Blue Team operations, and implementing enterprise Zero Trust, CSPM, CNAPP, ZTNA, and Vulnerability Management programs. Strong track record in designing secure architectures, maturing detection and response functions, and delivering cloud governance frameworks aligned with ISO 27001, PCI, and GDPR. Adept at collaborating with engineering, IT, and leadership stakeholders to strengthen organizational security posture through automation, governance, and continuous improvement. CORE SKILLS *Cloud Security & Architecture* AWS Security • Azure Security • GCP Security • CSPM • CNAPP • KMS • IAM • Network Segmentation • Security Hardening • Kubernetes Security (EKS) *Security Operations & Detection* SOC Leadership • Threat Intelligence • Incident Response • SIEM (Datadog, Azure Sentinel) • Cloud SIEM • SOAR • Log Pipelines • Detection Engineering • MTTD/MTTR Optimization *Zero Trust & Access Security* ZTNA (Zscaler / ZPA / ZIA) • Zero Trust Architecture • Identity Federation • Entra ID • Privileged Access Management *Vulnerability & Risk Management* Cloud Vulnerability Management • Container Security • Security Posture Assessments • PCI • ISO 27001 • GDPR Compliance *Networking & Infrastructure* BGP/OSPF/EIGRP • Cisco ASA/Nexus/Catalyst/Meraki • Juniper SRX/SSG • CheckPoint CloudGuard • Firewalls • VPN • WAF (Cloudflare, AWS, Akamai) *Automation & Engineering* Python • Bash • PowerShell • Terraform • CloudFormation • ARM Templates • CI/CD Security Integration
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Portugal
Information Technology & Services
Vulnerability Management, Cloud Security, Kubernetes, AWS Security, Microsoft Azure, Security, CSPM, Linux, Payment Card Industry Data Security Standard (PCI DSS), Python (Programming Language), Amazon Web Services (AWS), Palo Alto Networks Prisma, Akamai, Security Architecture Design, Prisma Cloud, Microsoft Entra ID, Cloudflare, GitHub, Terraform, GuardDuty
Experience

Lead Security Engineer
Portugal
- Promoted to lead Security Operations, managing both the SOC and Cloud Security teams and guiding the strategic direction of security initiatives across the organization. - Established and operationalized the SOC’s Threat Intelligence and Incident Response programs, enhancing detection capabilities, response maturity, and cross-team coordination during security events. - Led the implementation and continuous improvement of security alerting, monitoring, and triage workflows, ensuring high visibility into threats and faster mean-time-to-detection (MTTD). - Designed and launched the Cloud Security team’s Vulnerability Management Program, enabling structured prioritization, remediation workflows, and risk reduction across cloud and containerized environments. - Built and maintained an enterprise-wide CSPM program, ensuring ongoing compliance with internal policies and regulatory (ISO 27001, GDPR, PCI) requirements while optimizing cloud posture across AWS environments. - Introduced and managed Kubernetes workload protection using SentinelOne, providing runtime security, behavioral detection, and enhanced protection for containerized workloads. - Drove adoption of Zero Trust initiatives, including ZTNA enhancements, secure access patterns, and continuous security posture evaluation across applications and infrastructure. - Empowered the team through process modernization, automation, and clear operational frameworks, resulting in measurable improvements in response efficiency, risk reduction, and security governance.

Senior Security Engineer
Portugal
- Designed and maintained multi-account AWS security governance using AWS Organizations, Control Tower, SCPs, centralized logging, and cross-account monitoring strategies. - Managed and optimized the AWS infrastructure supporting Zscaler ZTNA (ZPA), ensuring resilient connectivity, secure access controls, and alignment with Zero Trust architecture principles. - Implemented, monitored, and enhanced security controls for AWS EKS clusters, integrating runtime visibility, compliance checks, and threat detection across Kubernetes workloads. - Delivered scalable AWS WAF protections for global applications, improving automated rule deployments, mitigating OWASP Top 10 threats, and reducing false positives. - Led continuous CSPM initiatives across AWS, integrating findings into remediation pipelines, compliance workflows, and executive reporting. - Migrate from Forcepoint CASB to Zscaler SaaS protection (ZIA) to strengthen SaaS visibility, internet encryption, and data protection across the organization. - Developed and deployed security automation projects using Python, Bash, and PowerShell to streamline operational tasks, enforce guardrails, and enhance incident response efficiency. - Planned and executed the insourcing of SOC operations, transitioning from outsourced services to an internally managed model—resulting in significant yearly cost savings and improved detection and response maturity. - Collaborated with engineering and platform teams to embed security into CI/CD workflows, implement least-privilege principles, and improve cloud infrastructure resilience. - Drove continuous improvement in threat monitoring, cloud governance, and operational processes through automation, documentation, and cross-functional enablement.

Senior Security Engineer
São Paulo, Brazil
- Managed and optimized AWS security controls, including AWS WAF, AWS Firewall Manager, Security Groups, and network protection policies across multiple AWS accounts. - Performed continuous CSPM (Cloud Security Posture Management) using Prisma Cloud assessments across AWS, Azure, and GCP, ensuring compliance with organizational and industry security standards. - Identified and remediated cloud security gaps, implementing fixes related to misconfigurations, identity risks, exposed services, and workload vulnerabilities. - Administered and tuned Cloudflare and Akamai WAF policies to enhance application-layer protection, reduce false positives, and mitigate OWASP Top 10 threats. - Collaborated with infrastructure and development teams to design secure deployment patterns, improve incident response workflows, and enforce best practices for cloud governance. - Developed security reports and dashboards to track cloud posture, threat trends, and remediation progress for technical and leadership stakeholders.

Senior Network and Cloud Architect
Sao Paulo, Brazil
- Led the design, deployment, and optimization of hybrid network architectures across on-premises datacenters and cloud environments (AWS and Azure). - Administered and maintained core IT infrastructure, including servers (Linux, Windows, SQL Server, MySQL Server), virtualization platforms (Hyper-V, VmWare) , storage, and enterprise network components. - Designed and implemented cloud networking solutions, including VPCs, VNets, Transit Gateways, VPNs, ExpressRoute, Direct Connect, routing policies, and segmentation strategies. - Deployed and managed firewall infrastructures on-premises and in the cloud (AWS WAF, Azure WAF, Azure Firewall, Checkpoint Cloudguard), ensuring secure traffic flows and compliance with security standards. - Built multi-tier cloud architectures leveraging load balancers (ALB, NLB, Azure Load Balancer, Application Gateway), private subnets, and NAT gateways. - Implemented and monitored infrastructure observability using CloudWatch, Azure Monitor, Zabbix, Grafana and SIEM tools to ensure high availability and performance. - Managed IAM, identity federation, and network security controls, applying least-privilege and Zero Trust principles. - Coordinated and supervised IT operations teams, providing technical leadership, mentoring, and support for critical infrastructure initiatives. - Collaborated with cross-functional teams to define networking standards, disaster recovery strategies, and cloud migration roadmaps. - Automated routine infrastructure tasks using Infrastructure-as-Code (Terraform/ARM/CloudFormation) and configuration management tools.

Senior Network Analyst
Conductor Tecnologia em Meios de Pagamento
Barueri, São Paulo
- Built, managed, and maintained the company's Azure cloud-based infrastructure. - Established and managed Azure ExpressRoute to ensure secure and reliable network connectivity. - Designed and implemented virtual networks, and Azure Front Door within Azure environments. - Implemented and managed Azure Firewall and Checkpoint CloudGuard firewall to protect cloud-based resources. - Built and managed AWS multi-account architecture for a new bussiness unity. - Azure Log Analytics to monitor the cloud environment and Zabbix to monitor the on-premises environment; - Support during PCI Certification for a Service Provider; - Thales HSM snmp monitoring; - Managed the MPLS interconnection between 3 datacenters and 3 remote offices. - Designed and managed the 3-tier datacenter network architecture, including a service provider PCI environment; - Managed the MPLS network connection to the credit card environment (Visa gateways, Mastercard gateways); - Juniper Router and Switch Administration (IPSec, BGP, ZBFW); - Cisco R&S Administration; - Aruba WiFi enterprise administration; - Checkpoint VSX Implementation;

Enterprise Network Consultant
Autônomo
- Worked as a self-employed registered Engineer (Brazilian Official Registration CREA-SP), developing network and telecommunications enterprise projects for service providers and corporations. - Worked as a consultant specializing in the interconnection of Public Switched Telephone Network (PSTN) operators. - Support during bid specifications.

Telecommunications Network Analyst
WMX Tecnologia
Greater São Paulo Area
- Worked on developing and implementing infrastructure cabling systems (copper and fiber); - Omnichannel Call Center and Contact Center projects (Cisco, Mitel, Avaya, Panasonic); - VoIP and analog TIE-LINE solutions for telephony systems; - Development of industrial-grade video surveillance systems; - Responsible for implementing Cisco data, voice, and video network solutions. - Wireless site survey and enterprise deployment; - Bid specifications support; - Troubleshooting VoIP, Router, and Switch issues at the protocol level; - Technical manager overseeing 10 telecommunications analysts.

IT Support Analyst - Bilingual
Greater São Paulo Area
- Monitored data center links and services, ensuring optimal performance and minimal downtime. - Supported international clients and partners by diagnosing and resolving hardware, software, and network connectivity issues promptly. - Performed routine maintenance, handled user access and application support, and documented incidents and service requests. - Communicated effectively in both English and Portuguese, enabling seamless assistance to stakeholders. - Escalated complex technical problems and maintained thorough operational records for continued service improvement.
Carlos Malian's Contact Information
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