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Energean is seeking to employ a highly skilled Senior Network &amp; Systems Administrator to join our Group IT team in Athens. This is a critical role responsible for ensuring the operational stability, security, and performance of our enterprise IT infrastructure across multiple company locations.&nbsp;The role, reporting to the Group Head of Cybersecurity, will act as the senior technical escalation point, maintaining high availability across systems, networks, virtualization platforms, and core services while driving operational excellence and resilience.&nbsp;&nbsp;Key Accountabilities&nbsp;<ul><li>Ensure continuous availability of core infrastructure services (compute, storage, network, identity, connectivity)</li><li>Act as the highest technical escalation point for complex infrastructure incidents</li><li>Provide advanced troubleshooting across hybrid, virtualized, and cloud-integrated environments</li><li>Manage and maintain identity services, DNS/DHCP, virtual environments, backup and recovery systems</li><li>Support WAN/LAN connectivity and secure remote access solutions</li><li>Execute patching, upgrades, and lifecycle management of infrastructure components</li><li>Ensure infrastructure meets defined RPO/RTO and availability targets</li><li>Support disaster recovery testing and failover readiness</li><li>Implement and maintain infrastructure security controls and hardening standards</li><li>Drive operational improvements, automation, and standardization initiatives</li><li>Maintain accurate technical documentation and operational procedures</li><li>Collaborate with service desk, cybersecurity, application teams, and external vendors</li><li>Support audits, compliance reviews, and risk assessments</li><li>Provide technical guidance to junior team members</li></ul>&nbsp;Qualifications and Experience&nbsp;<ul><li>Bachelor’s degree in IT, Computer Science, Engineering, or related field (or equivalent experience)</li><li>Minimum 5 years’ experience in enterprise infrastructure, systems engineering, or network administration</li><li>Experience supporting multi-site or geographically distributed environments</li><li>Strong hands-on expertise in:<ul><li>Enterprise networking (LAN/WAN, VPN, routing, switching)</li><li>Microsoft ecosystem (Windows Server, Active Directory, Microsoft 365)</li><li>Virtualization platforms (VMware, Hyper-V)</li><li>Cloud-integrated environments (Azure preferred)</li></ul></li><li>Proven experience in high-availability production environments</li><li>Strong troubleshooting and incident resolution capability</li><li>Proficiency in English is essential. Willingness to travel globally.</li></ul>&nbsp;Skills&nbsp;<ul><li>Analytical thinker with strong problem-solving skills</li><li>Service-oriented with strong ownership and accountability</li><li>Excellent communication skills in English (written &amp; verbal)</li><li>Able to perform under pressure during major incidents</li><li>Collaborative, proactive, and adaptable</li></ul>&nbsp;Rewards:We offer an excellent benefits package including Medical, Pension, Life Insurance, continuous development, career development opportunities.

Senior Network and Systems Administrator

Epsilon Net,&nbsp;the largest Group of Business Software in Greece with&nbsp;a full portfolio of specialized services and software solutions, offers you:Career Growth&nbsp;–&nbsp;Join a team where you can develop, learn, and evolve.Supportive Culture&nbsp;– Thrive in an environment that fosters teamwork, knowledge-sharing, and excellence.Top Clients &amp; Technology&nbsp;–&nbsp;Work with the best professionals in the development sector and cutting-edge tools&nbsp;As a Senior Systems and Network EngineerKey Responsibilities:• Deploy, and manage network infrastructure including routing, switching, and firewalling, in Fortinet and Cisco solutions• Configure and maintain NAC, VPNs, IDS/IPS, and network segmentation• Respond to and resolve security incidents, network outages, and system failures in the corporate helpdesk and incident management system• Manage, maintain and update Windows Server environments (Active Directory, DNS, DHCP, GPO, File Services)• Operate and optimize Hyper-V virtualization platforms• Ensure high availability through clustering, replication, and backup strategies• Monitor infrastructure performance and proactively address vulnerabilities and threats• Implement and enforce security policies, access controls, and compliance standards• Provide L3 support and troubleshooting for complex network, security, and systems incidents• Maintain accurate documentation of network topology, server configurations, and procedures• Evaluate and recommend new technologies to improve security posture and infrastructure efficiency• Mentor junior engineers and drive infrastructure improvement projects&nbsp;Requirements:•Bachelor's degree in Computer Science, Information Systems, Engineering, or related field•5+ years in a systems/network engineering role•Security-first mindset with real-world incident handling experience•Familiarity with security frameworks and best practices (NIST, ISO 27001, NIS2, DORA)•Hands-on experience with Fortinet solutions (FortiGate, FortiManager, FortiAnalyzer, FortiSwitch) and Cisco technologies (Catalyst, Nexus, ISE)•Deep understanding of networking protocols: BGP, OSPF, VLAN, MPLS, SD-WAN•Experience with VPN technologies (IPsec, SSL/TLS)•Hands-on experience with Hyper-V cluster management•Proven expertise in Windows Server (2016/2019/2022) — AD DS, DNS, DHCP, GPO•Problem-solving skills and ability to work under pressure•Good communication skills in English&nbsp;Nice to Have:• Knowledge on Compliance and Security policies (ISO 27001 and GDPR, NIS2, DORA regulations)• Knowledge in Manage Engine’s services (Service Desk, Site 24x7, Patch Management)• Knowledge on Cloud Networking Technologies like SASE, SDWan, CASB, SSE, SWG, ZTNA• Relevant certifications are a plus: NSE 4–7, CCNA, CCNP, MCSA/MCSE, or equivalent• Experience with Azure ARC and Azure Local (HCI Stack)• Experience with Veeam backup solution• Knowledge of log management tools, EDR/XDR technologies and NOC / SOC services• Familiarity with storage technologies (FC, SAN, NAS, iSCSI)• Scripting skills (PowerShell, Python, Bash, …) for automation tasks• Experience with VMware vSphere / vCenter — ESXi hosts&nbsp;What We Offer:💰&nbsp;Competitive salary &amp; benefits package📚 Ongoing training &amp; career development (Epsilon Training &amp; Epsilon College)🩺 Private medical insurance &amp; psychological support services🏆 Multi-awarded workplace (Fortune’s 100 Best Companies to Work For in Europe 2024, Best Workplace in Technology, Best Workplaces for Women)

Senior Systems and Network Engineer

The role is within the Strategy team at Temenos, reporting to a Strategy Director. The team works closely with Temenos senior management in formulating and delivering on customized business strategies to grow our top-line and transform our business. Projects cut across Growth Strategy, Product Strategy, Business unit / Regional Strategy, M&amp;A, Investor Relations, Competitive response, Pricing, etc.We are seeking an experienced (2 years+) Junior Associate / Associate (McKinsey) or Associate / Consultant (BCG / Bain) or equivalent from other top tier Strategy Consulting firm. Knowledge and interest in Banking / Technology in financial services will be highly beneficial for this role.The candidate will be expected to be a high-performing and independent contributor, working closely with many stakeholders across regions, product lines and functions.&nbsp;OPPORTUNITES<ul><li>The role offers full breadth of Corporate Strategy, allowing you to develop comprehensive commercial consulting skills and will teach you to run and grow a technology company</li><li>You will develop banking market and competitive insights &amp; implications for the company at regional &amp; central level, through data analysis and research and by speaking to Clients, Partners, Investors, experts and internal stakeholders</li><li>You will develop market entry, market expansion, product, and turnaround strategies.</li><li>You will work with cross functional teams (Product, Sales, Pre-Sales, Marketing etc.) and regions to formulate Go-to-Market strategies (E.g. Corporate Lending, Banking-as-a-Service).</li><li>You will devise competitor specific strategies (Product-market fit, Partnerships, Deal execution, etc.) to improve win-rate</li><li>You will distil insights and develop recommendations to feed into Product Strategy and roadmap</li><li>You will drive/support special projects as and when commissioned by the ExCo e.g. Strategic Fit assessments for M&amp;A, targeted growth initiatives undefined</li></ul>SKILLS<ul><li>You should possess proven analytical, problem solving and organizational skills.</li><li>You should have the ability to independently execute hypothesis driven analysis and storylines.</li><li>You should have outstanding written and verbal communication, interpersonal and presentation skills – particularly in translating complex data into simple, compelling messages / impactful insights.</li><li>You should have the ability to collaborate effectively within the team and across functions, and build positive relationships with different business partners to achieve results.</li><li>You should enjoy working under pressure to deliver on time with a high level of integrity, sense of urgency, attention to detail and high quality standards</li><li>You should have the following specific technical skills:</li><li>Market / industry analysis within Banking and Financial Services (preferred, not mandatory)</li><li>Consulting toolkit (structuring, story lining, hypothesis driven problem solving, etc.)</li><li>Market sizing</li><li>Excel / data modelling / PowerPoint</li></ul>Key attributes:<ul><li>Effective written and verbal communication with internal stakeholders (sales, presales, product, marketing, investor relations) and external stakeholders (senior business and IT executives at the banks)</li><li>Exceptional analytical ability including interpretation of large data sets and deciphering the findings into clear messages and visuals</li><li>Ability to think creatively and build complex financial models</li><li>Self-motivated, fast learner with the ability to operate independently</li><li>Ability to work with cross-functional teams</li><li>Team player with strong interpersonal skills</li><li>Passionate about working in different cultures and geographies – open to travel from time to time (&lt;10% of time)</li><li>Demonstrate high ethics and values, inspiring loyalty and trust</li><li>Strong work ethic</li><li>An entrepreneurial and creative mind-set.</li></ul>Pre-requisites to apply:<ul><li>Minimum 2 years relevant experience at a top-tier Strategy Consulting firm (i.e. McKinsey, Bain or Boston Consulting Group) within the Consulting/Partner track</li><li>This role is not for those close to making Project Leader / Engagement Manager</li><li>Past experience within Banking at these firms or prior work experience in Banking (Product, Sales, Technology Business analyst) or Technology a strong advantage</li><li>Undergraduate degree in engineering or business</li><li>Master’s degree in Management or other business related area.</li></ul> SOME OF OUR BENEFITS include:<ul><li>Maternity leave: Transition back with 3 days per week in the first month and 4 days per week in the second month</li><li>Civil Partnership: 1 week of paid leave if you're getting married. This covers marriages and civil partnerships, including same sex/civil partnership</li><li>Family care: 4 weeks of paid family care leave</li><li>Recharge days: 4 days per year to use when you need to physically or mentally needed to recharge</li><li>Study leaves: 2 weeks of paid leave each year for study or personal development&nbsp;</li></ul>

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senior network and systems administrator

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senior systems and network engineer

Epsilon Net

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Temenos

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