{"id":3375960,"url":"https://alion.io/job/terra-systems-communications-engineer","title":"Communications Engineer","company":{"id":4481475,"name":"Terra Systems","domain":"terra.systems","url":"https://alion.io/company/terra-systems","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"middle","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Singapore"],"countries":["SG"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":4000,"max":7000,"currency":"SGD","period":"month","gross":true,"usd_annual":65580},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"LLM","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"TCP/IP","optional":false},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"VLAN","optional":true}],"status":"live","first_seen_at":"2026-10-28T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-28T00:00:00Z","board_verified":false,"closed_at":null,"days_open":7,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":7},"description":"Communications Engineer About the Role\nJob Title: Communications Engineer\nCompany: Terra Systems Pte Ltd\nLocation: Singapore\nEmployment Type: Full-Time\nWe are seeking an experienced Communications Engineer to design, secure and operate enterprise communications environments for our clients. The role spans voice and contact centre, enterprise networking, cybersecurity, and AI-enabled communications.\nThe ideal candidate brings strong system programming knowledge and experience, preferably with Avaya and Cisco telephony and contact centre expertise, solid networking and security fundamentals, and a keen interest in applying AI to customer and enterprise communications.\nKey Responsibilities\nVoice and Contact Centre\nDesign, deploy and manage Avaya and Cisco voice systems, including PBX, VoIP, unified communications and contact centre platforms.\nPerform system upgrades, patches and configuration changes to ensure optimal performance and security.\nSupport migration of on-premise voice and contact centre platforms to cloud and hybrid models.\nNetworking\nDesign, configure and maintain enterprise LAN, WAN, SD-WAN and wireless networks supporting voice, video and data.\nImplement QoS, routing and switching policies that keep real-time communications reliable.\nCollaborate with infrastructure and cloud teams to integrate communications solutions with existing environments.\nCybersecurity\nHarden UC and network infrastructure using session border controllers, firewalls, segmentation, encrypted signalling and media (TLS/SRTP) and strong access control.\nMonitor for and respond to threats such as toll fraud, SIP attacks and denial-of-service; support vulnerability assessments, penetration tests and incident response.\nEnsure compliance with industry standards, client security policies and applicable regulations (e.g. PDPA, Cybersecurity Act).\nAI and Automation\nImplement and integrate AI-enabled communications such as conversational IVR, voicebots and chatbots, speech analytics, real-time agent assist and transcription.\nEvaluate AI solutions for accuracy, security, data privacy and responsible use, including testing for misuse and prompt-injection risks.\nAutomate configuration, monitoring and reporting using scripting and APIs.\nGeneral\nTroubleshoot and resolve complex issues across voice, network and security domains, ensuring minimal downtime and high availability.\nProvide technical documentation, training and support for internal teams and clients.\nRequirements\nMinimum 3 years of hands-on experience in voice or unified communications engineering, with exposure to enterprise networking and security.\nStrong expertise in system programming, preferably in Avaya Aura, Cisco Unified Communications Manager (CUCM) and related telephony solutions.\nSolid understanding of SIP, RTP and VoIP protocols, TCP/IP, routing and switching, VLANs and QoS.\nWorking knowledge of network security: firewalls, session border controllers, VPNs, IDS/IPS and secure configuration practices.\nFamiliarity with AI-enabled communications tools (conversational AI, speech-to-text, LLM-based assistants) and cloud contact centre platforms is a strong plus.\nScripting and automation skills (e.g. Python, REST APIs) are an advantage.\nExperience with IVR systems and voice recording platforms is a plus.\nExcellent problem-solving skills and ability to work under pressure.\nCertifications (highly desirable)\nVoice and collaboration: Avaya Certified Specialist, Cisco CCNP Collaboration\nNetworking: Cisco CCNP Enterprise or equivalent\nSecurity: CCNP Security, CompTIA Security+, CISSP or equivalent\nAI and cloud: vendor certifications in AI or cloud platforms (e.g. Microsoft Azure AI Engineer, AWS)\nWhy Join Us?\nWork where communications, networking, cybersecurity and AI converge, on projects for enterprise and public-sector clients.\nGain exposure to national-level cybersecurity and AI safety initiatives in Singapore.\nCompetitive salary and benefits package.\nCareer growth and professional development, including sponsored certifications.\nApply Now\nSend your resume and cover letter to  with the subject line Communications Engineer Application.\nSkills\nCompetitive Advantage, Telephony System, telephony servers, VoIP telephony, Communication Tools, Patch Management, Real-time Communications, Avaya IP Telephony, Audio Systems, Enterprise Networking, Collaboration Solutions, Virtual Local Area Network (VLAN), Voice Services, Conversational AI, Networking, Cisco Voice, Automation Scripting, Work Under Pressure, Cti, Computer Telephony, Network Security","description_format":"text","description_chars":4569,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Professional development"],"hiring_locations":[{"name":"Singapore","iso":"SG","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Information Security"],"lifecycle":[{"event":"open","at":"2026-10-28T02:28:15Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring 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