Hire the Best Network Security Engineers in California

IT Consultant: Infrastructure Design, Security, and Systems Automation I've provided secure, scalable, and maintainable systems for enterprises, research institutions, and media companies. My focus is on reducing technical debt and hardening infrastructure against modern threats through tailored, professional-grade solutions. I am currently offering competitive introductory rates for new clients to establish long-term partnerships on the platform. Professionally Licensed and Insured. Core Capabilities Systems and Security Windows, Linux, and Unix administration, hardening, firewalls, and VPN integration. Expertise in mail servers (Postfix, Exim, Sendmail), DNS (BIND), and deployment via Ansible. Full CI/CD pipeline management (GitLab, Jenkins) and incident response planning. Web and Applications High-performance configuration for Apache and NGINX, reverse proxies, WordPress, and Drupal. Specializing in seamless patching and performance optimization. Data and Cloud Database administration, ETL pipelines, and analytics workflows. AWS cloud architecture and complex migrations. Specialized Experience * Digital Forensics and Incident Response (DFIR). * High-performance computing (HPC) and scientific research systems. * OEM hardware diagnostics and remote troubleshooting. * Big-data email infrastructure and advertising pipelines. Certifications Active: AWS CCP, Linux+, SecurityX Technical Background: RHCE, MCP, CySA+, AWS Solutions Architect, Fortinet NSE -- UMA Summary follows -- A skilled CyberSecurity Admin specializing in IT security audits, incident response, and network infrastructure optimization. Successfully conducted security assessments for email and website vulnerabilities [1] and implemented DDoS protections for gaming servers [2], showcasing capabilities in threat mitigation and security hardening. Proficient in systems administration, network security, and vulnerability assessments, applying these skills to create secure, scalable solutions for complex environments. Expertise in automation tools, firewall configuration, and database management rounds out their capabilities. Show less Generated by Uma, Upwork’s Mindful AI, from completed jobs Skills used Information Security Audit Network Administration Network Equipment Network Security Vulnerability Assessment

Meraki Certified Network Operator and Firewall Network engineer, I have many years setting up and configuring, VPN, SD-WAN and remote locations Meraki and Cisco Switches and networking. Fortinet Firewall setup and config with remote locations and firewall filtering. User VPN setup and configure. Firewall rules and filtering. Nimble SAN Storage server setup and config with VMWare Esxi 5.0-6.7 setup and config with ISCSI connectivity for system storage profiles. Switches, Cisco Aeronet, Meraki, Ubiquiti and Motorola wireless, Nuuo video monitoring and LifeSize video conferencing. Troubleshoot TCP/IP, DNS, WINS, DHCP and VPN. Support and maintain computing services including Windows Hyper-V and IBM iSeries and System X servers, VMWARE Esxi 5.5-6.5. Server, 2003-2019 Citrix XenApps, and Windows environment. Troubleshoot EDI transactions in Data Masons Vantage Point and Liaison AS2. Administer Office 365 mail and apps.

I’m a passionate IT professional with 15+ years of experience designing, deploying, and troubleshooting medium to large-scale enterprise networks - from multi-site data centers to campus infrastructures. For the past 7+ years, I’ve also led high-performing teams to deliver secure, scalable, and optimized solutions. I specialize in transforming complex enterprise networks into highly available, reliable, and secure environments. My strengths include fast problem-solving, clear communication, and quick adaptability, ensuring projects are completed efficiently and with measurable results. When you work with me, the buck stops here - I take full ownership to make sure your network challenges are solved and your goals are met.

Hi! My name’s Jonathan and I’m a network and systems engineer. Over the past 8 years, I've built and maintained networks and IT infrastructure for healthcare practices, law firms, government contractors, non-profits, media agencies, IT service providers, and hundreds of other businesses across the country. My consulting practice is professionally insured up to $2 million and I can provide a certificate of insurance upon request. My technical approach is analytical and systematic, but also efficient. During an active contract, I'm happy to work with you live over Zoom, phone, email, messages, whatever works for you! My professional experience includes (but is not limited to): - Planning/managing/troubleshooting office networks, multi-tenant/commercial property networks, satellite campus properties, secure access networks, and even carrier networks. - Administrating and implementing corporate IT security to align with strict data security standards (e.g., HIPAA, ISO 27001, and SOC2) - Design, configuration, and supervision of tailored corporate networks, VPNs, access controls, firewalls, servers, and hybrid cloud connects. I am familiar with most of the major manufacturers of networking equipment. - Implementing purpose-built cloud architectures for a variety of enterprise use cases on AWS and Azure (I can also set up Site-to-Site tunneling to/from networks based on AWS, Azure, and on-premises) Please note that I am currently only accepting US-based clients and that my availability hours are based in Pacific Time. I do not currently accept fixed price jobs or consumers (I am strictly a B2B consultant)

Are you looking for an expert to architect a bulletproof data center infrastructure, secure your enterprise with next-gen firewalls, or seamlessly bridge your on-prem network to AWS/Azure? I am a Senior Network Engineer and Infrastructure Architect with extensive experience designing, deploying, and troubleshooting carrier-grade and enterprise networks. From high-throughput data centers (Equinix, CoreSite, Switch) to complex hybrid-cloud environments, I build resilient networks engineered for maximum uptime. --- 🛠️ What I Can Do For Your Business: • Data Center & ISP Architecture: Multi-home BGP engineering, IXP peering, traffic engineering, DWDM, dark fiber deployment, and carrier transit optimization (Lumen, NTT, Zayo). • Next-Gen Security & Firewalls: Architectural design, zoning, and multi-tenant policy enforcement for Fortinet (FortiGate), Palo Alto, Cisco (ASA/FTD), and Juniper SRX. • Cloud & Hybrid Infrastructure: Designing highly available AWS/Azure hybrid environments utilizing Direct Connect, Transit Gateways, and secure IPsec VPN tunnels. • Automation & Proactive Monitoring: Custom Python/Bash scripting for automated capacity reporting, NetFlow analysis, and comprehensive Zabbix/SolarWinds monitoring deployment. • Emergency L3 Escalation: Full-stack troubleshooting (Layers 1–7) to isolate and remediate complex network outages rapidly. --- 🌐 Core Technical Expertise: • Routing & Switching: OSPF, BGP (iBGP/eBGP), EIGRP, MPLS, EVPN-VXLAN, M-LAG, vPC, Spanning Tree (RSTP/MST). • Vendor Hardware: Juniper MX (960/480/240), EX, QFX; Cisco Nexus (9000/9500), ASR, Catalyst; Arista; Fortinet; Mikrotik. • VPN & Zero Trust: IPsec, SSL VPN, GRE, DMVPN, ZTNA, 802.1x. • Systems & Virtualization: Linux (RHEL, Ubuntu, Rocky), VMware ESXi/vCenter clustering, Proxmox VE, Windows Server, Active Directory. • Storage & Hardware: Dell PowerEdge, HP ProLiant, SAN/NAS (iSCSI, NFS), PowerVault. • Telecom & Voice: Asterisk, SIP trunking, PRI/E1 infrastructure. --- 📜 Certifications: • Cisco CCNP Routing & Switching • Cisco CCNA Security Whether you need a full network redesign, a firewall migration, or emergency escalation support, let’s connect to discuss how I can keep your infrastructure secure, scalable, and stable.

Experienced Network Engineer specializing in network design, configuration, optimization, and troubleshooting. I work with a wide range of technologies—routing, switching, firewalls, VPNs, and wireless networks—to build secure, scalable, and high-performance infrastructures. Skilled in Cisco, MikroTik, Checkpoint, Palo Alto, and other major platforms. I deliver: • Network design & architecture • Router/Switch/Firewall configuration • VPN setup (IPsec, OpenVPN, SSL) • Network security hardening • Performance optimization & troubleshooting • Documentation & ongoing support Focused, detail-oriented, and committed to providing reliable, high-quality solutions.