Information Technology Support Specialist

SISL Global; Greater London; On-site; GBP 32,000 - 52,000; Full time

Job summary

SISL Global in Greater London is seeking an experienced Desktop Support Engineer (Band 3) to deliver advanced end-user support across the organization. You will handle escalated incidents and ensure smooth operation of desktops, laptops, OS, and core enterprise applications.

You will work with the IT team to manage patch updates, endpoint security, and ITIL-aligned processes while assisting users with connectivity, VPN, printers, and hardware issues.

Qualifications

• 3–5 years of desktop/end-user support experience.
• Strong troubleshooting across Windows, macOS, VPN, hardware.
• Hands-on with Active Directory, Group Policy and patch management.
• Knowledge of ITIL processes (Incident, Change, Problem).
• Good communication and customer-handling skills.
• Preferred: MCSA/MCSE, ITIL Foundation, CompTIA A+/N+.

Responsibilities

• Provide Level 2 and 3 support for desktops, laptops, OS, and enterprise apps.
• Handle escalations from L1 and L2 and resolve complex issues.
• Manage patch updates, endpoint security, and compliance checks.
• Support users with network connectivity, VPN, printers, and hardware issues.
• Coordinate with infrastructure and security teams for resolution.
• Maintain accurate incident documentation and preventive actions.
• Participate in IT audits and ensure policy compliance.

Skills

Desktop Support

Windows

macOS

VPN

Hardware

Active Directory

Group Policy

Patch management

ITIL

MCSA/MCSE

ITIL Foundation

CompTIA A+/N+

Job description

We are looking for an experienced Desktop Support Engineer (Band 3) who can provide advanced technical support, handle escalated incidents, and ensure smooth functioning of end-user systems across the organization.

Key Responsibilities

• Provide Level 2 & 3 support for desktops, laptops, OS, and enterprise applications.
• Handle escalations from L1 and L2 teams and resolve complex technical issues.
• Manage patch updates, endpoint security, and compliance checks.
• Support users with network connectivity, VPN, printers, and hardware issues.
• Coordinate with infrastructure/security teams for problem resolution.
• Maintain accurate documentation of incidents, solutions, and preventive actions.
• Participate in IT audits and ensure compliance with company standards.

Required Skills :

Systems: Windows 10/11, Windows Server 2003-2019, Ubuntu Linux, Mac OS, VMWare, Hyper-V Networking: TCP/IP, IPAM, DHCP, DNS, SNMP, Wireshark, TCPDUMP, Observium, NetBox Security: Active Directory, LDAP/RADIUS, IPsec/SSL VPN, 2FA, Crowdstrike, ESET

Trading Apps experience Candidates will be preferred

Activ, AxeTrader, Bloomberg, Eikon, IB Trader Workstation, LiveVol Pro, MarketAxess, Matrix, Microhedge, RealTick, ROX, Sterling Trader/Manager, TradeWeb, Trumid

Skills & Qualifications

• 3–5years of experience in Desktop/End-User Support.
• Strong troubleshooting skills in Windows, macOS, O365, VPN, and hardware.
• Hands-on experience with Active Directory, Group Policy, and patch management tools.
• Knowledge of ITIL processes (Incident, Change, Problem Management).
• Good communication and customer-handling skills.
• Preferred: MCSA/MCSE, ITIL Foundation, CompTIA A+/N+.