Senior Systems

Senior Network Security & VoIP Engineer (Zscaler) – L3 3 weeks ago Be among the first 25 applicants Summary We’re hiring a hands‑on Senior Systems & Network Engineer to run core secure‑access and voice systems for a growing, remote‑first team. This role is for someone who loves fixing hard problems, owning platform health, and automating repetitive work: you’ll administer Zscaler (ZIA, ZPA, ZCC), manage enterprise VoIP (RingCentral, TalkDesk, Twilio or similar), troubleshoot SIP/RTP and integration issues, and build automation workflows that link comms, CRM and ticketing systems for better reliability and observability. Important: this is a Tier‑2+ role and candidates MUST HAVE hands‑on Zscaler administration and VoIP/UC experience. Key Responsibilities (what You’ll Own) Zscaler & Network Security Administer and support Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA), and Zscaler Client Connector (ZCC). Validate traffic routing (ZCC vs PAC), analyze admin‑portal logs and client diagnostics, and tune policies. Manage auth rules, SSL inspection, user profiles and zero‑trust access policies. Troubleshoot connectivity/performance and escalate to Zscaler TAC when required. VoIP / Communications & Integrations Administer and automate RingCentral, TalkDesk, Twilio (or equivalent). Troubleshoot SIP/RTP, codecs, SBC/NAT issues, call routing, IVR/queue logic and call‑quality problems. Create integrations to CRM/ticketing systems (auto‑logging calls, routing, analytics). Improve reliability, reporting, QoS and operational runbooks for voice systems. Systems & Support Provide Tier‑2 escalation support for Windows, macOS, SaaS and network incidents; document runbooks. Administer Google Workspace, Microsoft 365, Autopilot/Intune/Jamf, MDM/SSO and endpoint posture tools (NinjaOne, SentinelOne). Monitor systems (Zabbix/observability), support basic AWS operations for internal automation backends, and maintain knowledge base documentation. Operations & Collaboration Work with security, operations and engineering to enforce access integrity and compliance. Maintain clear documentation, playbooks and SLAs; hand over well‑scoped issues to Tier‑3 or vendors as needed. Must‑have Qualifications 5+ years in IT systems or network administration (Tier‑2 or above). Hands‑on Zscaler experience: ZIA, ZPA, ZCC — policy management, SSL inspection, logs, troubleshooting. Hands‑on VoIP/UC experience: RingCentral, TalkDesk, Twilio, or similar — and practical SIP/RTP troubleshooting. Strong networking fundamentals: DNS, VPN, routing, TLS/SSL, certificates, proxies, NAT/SBC. Excellent troubleshooting, documentation and communication skills. Nice‑to‑have Experience with Autopilot, Intune, JAMF, 1Password enterprise, NinjaOne, SentinelOne. Familiarity with SPF/DKIM/DMARC, Google Workspace/Microsoft 365 mailflow, HubSpot/CRM integrations, Jira Service Management. Zscaler Certified Administrator, relevant UC/VoIP or networking certifications (CompTIA Network+/Security+, ITIL). What We Offer 100% remote role with flexible hours and global collaboration. Competitive salary, professional development and certification support. Real ownership: automate, stabilize and scale systems that impact the whole company. Collaborative, supportive environment and exposure to enterprise‑grade security and comms platforms. About Bold Business Bold Business is a US‑based global business process outsourcing (BPO) firm with over 25 years of experience and $7 B+ in client engagements. We help fast‑growing companies scale through smart talent strategies, automation, and technology‑driven solutions. #J-18808-Ljbffr