Senior IT System Administrator / Infrastructure Engineer

Job Title: Senior IT System Administrator / Infrastructure Engineer (高級 IT 系統管理員 / 基礎設施工程師)

Role Summary:

We are looking for an experienced and proactive Senior IT System Administrator / Infrastructure Engineer to maintain and optimize our enterprise-grade IT infrastructure.

In this role, you will be responsible for managing multi-domain Active Directory environments, hybrid virtualization platforms (XenCenter\XenServer, VMware & H3C UIS), enterprise SAN/NAS storage systems, Citrix VDI/NetScaer (ADC) Remote Access solutions, and essential network/core services. You will ensure high availability, data security, system disaster recovery, and seamless daily operational support across media and corporate environments.

Key Responsibilities:

1. Multi-Domain Active Directory & Core Infrastructure Services

• Administer multi-domain Active Directory environments, including GPOs, trust relationships, and domain health.
• Manage enterprise email services involving Cisco Secure Mail (ESA/CES) gateway and Microsoft Exchange Server.
• Oversee core network and identity services: DNS, DHCP, NTP (Time Sync), and PaperCut Print Services (Ricoh).
• Manage Microsoft licensing and agreements (KMS, MPSA, WSUS patch management).

2. Backup Operations

• Perform system backup, data protection, and restore operations using Veeam Backup & Replication, Anybackup (UIS).

3. Virtualization, Cloud Desktop & Server Hardware Management

• Administer virtualization environments, including H3C UIS Hyper-Converged Infrastructure (HCI) and multiple VMware ESX clusters (DMZ, OMZ, and HR zones).

• Maintain Citrix XenDesktop / XenApp / XenServer virtual desktop infrastructure.

• Responsible for physical server hardware maintenance (HP, DELL, Huawei) located in the Central Equipment Room (CER).

• Monitor system availability and performance using PRTG Network Monitor.

Requirements:

Technical Skills & Experience (Must-Have)

• Experience: 4+ years of hands-on experience in enterprise IT system administration, preferably in media, broadcasting, or large-scale multi-site corporate environments.
• Active Directory: Strong knowledge of multi-domain AD management, GPO, DNS, DHCP, and Windows Server ecosystem.
• Virtualization & VDI: Proven experience with VMware vSphere/ESXi, Hyper-Converged Infrastructure (e.g., H3C UIS), and Citrix XenDesktop/XenApp/NetScaler.
• Backup & DR: Solid experience with Veeam Backup & Replication or enterprise backup software.
• Email & Security: Familiarity with Microsoft Exchange, Cisco Secure Mail, Kaspersky, and basic SOC/MSSP coordination.

Preferred Certifications (Nice-to-Have)

• VMware Certified Professional (VCP)
• Citrix Certified Associate/Professional (CCA-V / CCP-V)
• Microsoft Certified: Windows Server Hybrid Administrator Associate

Soft Skills & Languages

• Languages: Fluent in Cantonese and English; proficiency in Mandarin is a strong advantage for communicating with vendor technical teams in Mainland China.
• Problem Solving: Strong analytical and troubleshooting skills under pressure to ensure 24/7 service availability for critical systems.
• Documentation: Good habits in maintaining clear system topology diagrams, runbooks, inventory records, and operational logs.

職位概述:

我們正在尋找一位經驗豐富且主動積極的高級 IT 系統管理員 / 基礎設施工程師，負責維護與優化本公司的企業級 IT 基礎設施。

在本職位中，您將負責管理多網域 Active Directory 環境、混合虛擬化平台（XenCenter/XenServer、VMware 及 H3C UIS）、企業級 SAN/NAS 儲存系統、Citrix VDI/NetScaler (ADC) 遠端存取方案以及核心網路/系統服務。您將確保媒體與企業環境中的系統高可用性、資料安全性、災難復原能力以及流暢的日常營運支援。

主要職責:

1. 多網域 Active Directory 與核心基礎設施服務

• 管理多網域 Active Directory 環境，包含 GPO（群組原則）、信任關係及網域健康狀況。
• 管理企業電子郵件服務，包含 Cisco Secure Mail (ESA/CES) 安全閘道與 Microsoft Exchange Server。
• 監督核心網路與身分識別服務：DNS、DHCP、NTP（時間同步）及 PaperCut 列印服務 (Ricoh)。
• 管理 Microsoft 授權與合約（KMS、MPSA、WSUS 系統更新管理）。

2. 備份作業

• 使用 Veeam Backup & Replication 與 Anybackup (UIS) 執行系統備份、資料保護與還原作業。

3. 虛擬化、雲端桌面與伺服器硬體管理

• 管理虛擬化環境，包含 H3C UIS 超融合基礎設施 (HCI) 及多個 VMware ESX 叢集（DMZ、OMZ 與 HR 區域）。
• 維護 Citrix XenDesktop / XenApp / XenServer 虛擬桌面基礎設施 (VDI)。
• 負責位於中央機房 (CER) 的實體伺服器硬體維護（HP、DELL、華為）。
• 使用 PRTG Network Monitor 監控系統可用性與效能。

任職要求:

技術技能與經驗（必備條件）

• 工作經驗： 具備 4 年以上企業級 IT 系統管理實務經驗，優先考慮具備媒體、廣播或大型多據點企業環境背景者。
• Active Directory： 精通多網域 AD 管理、GPO、DNS、DHCP 及 Windows Server 生態系統。
• 虛擬化與 VDI： 具備 VMware vSphere/ESXi、超融合基礎設施（如 H3C UIS）及 Citrix XenDesktop/XenApp/NetScaler 之豐富實務經驗。
• 備份與災難復原： 具備 Veeam Backup & Replication 或企業級備份軟體之操作經驗。
• 電子郵件與資安： 熟悉 Microsoft Exchange、Cisco Secure Mail、Kaspersky 及基礎 SOC/MSSP 資安協同作業。

優先認證（加分條件）

• VMware Certified Professional (VCP)
• Citrix Certified Associate/Professional (CCA-V / CCP-V)
• Microsoft Certified: Windows Server Hybrid Administrator Associate

軟實力與語言能力

• 語言能力： 精通廣東話與英語；具備良好普通話能力者優先（以利與中國大陸供應商技術團隊溝通）。
• 問題解決： 具備強大的分析與抗壓除錯能力，確保關鍵系統提供 24/7 不間斷服務。
• 文件撰寫： 具備良好的文件管理習慣，能維持清晰的系統拓撲圖、維運手冊 (Runbooks)、資產清單與營運日誌。