Microsoft SQL Server

Onyx-Conseil; Greater London; Hybrid; GBP 55,000 - 60,000; Full time

Job summary

Onyx-Conseil is looking for a Senior IT Infrastructure & Systems Manager in Greater London. You will oversee and enhance the organization's IT infrastructure ensuring security, performance, and compliance.

The ideal candidate has over 7 years of experience in enterprise IT, especially in financial services, and proficiency with technologies like Windows Server and VMware. This role offers a hybrid work environment and a salary range of £55,000 to £60,000.

Qualifications

• 7+ years of experience in enterprise IT infrastructure and systems administration.
• Proven experience managing mission-critical infrastructure and applications.
• Experience operating within regulated and security-focused environments.

Responsibilities

• Administer, maintain, and optimize Windows and Linux server environments.
• Manage VMware virtualised infrastructure.
• Oversee enterprise backup and disaster recovery solutions.

Skills

Windows Server 2019/2022

VMware vSphere/vCenter

Veeam Backup & Replication

Microsoft Office 365

PowerShell scripting

SQL Server administration

Networking fundamentals

Tools

Veeam ONE

Splunk

Cisco switches/routers

Job description

Senior IT Infrastructure & Systems Manager

We are seeking an experienced and highly motivated Senior IT Infrastructure Manager with at least 7 to 10 years of experience to oversee, manage, and continuously improve the organization's IT infrastructure, enterprise systems, network environment, and end‑user computing services. The successful candidate will ensure the availability, security, performance, and resilience of critical business systems while leading technical teams and supporting key stakeholders across the organization.

Responsibilities:

• Administer, maintain, and optimize Windows and Linux server environments.
• Manage VMware virtualised infrastructure (vSphere 8 and above).
• Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication, Veeam ONE monitoring and VRO environments.
• Administer endpoint security and encryption solutions, including Symantec Endpoint Protection and Symantec Endpoint Encryption.
• Support endpoint DLP, SIEM and security monitoring tools (e.g., Splunk, Tenable).
• Manage patching processes using ManageEngine Patch Manager Plus.
• Support Microsoft 365 services and related cloud technologies.
• Monitor system performance, capacity, availability and infrastructure health.
• Ensure compliance with IT governance, security policies and operational standards.
• Provide advanced desktop, laptop, printer, mobile device and branch office IT support.
• Manage OS deployment, imaging, image creation, maintenance and software packaging.
• Administer Active Directory, Group Policy Objects, user provisioning and NTFS permissions.
• Resolve technical incidents and service requests in line with agreed SLAs.
• Support business‑critical applications such as Bloomberg FXT, Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access, 1AML, SIBS, GFMS.
• Configure and support Cisco switches, routers, FortiGate firewall environments and DNS, DHCP, TCP/IP, LAN/WAN, routing and connectivity troubleshooting.
• Perform SSL/TLS certificate lifecycle management using OpenSSL.
• Develop, maintain and enforce IT policies, standards and operating procedures.
• Produce system architecture diagrams, technical documentation, SOPs, and performance reports.
• Identify and drive opportunities for automation and service improvement.
• Support technology planning, infrastructure modernisation and transformation initiatives.

Qualifications:

• 7+ years of experience in enterprise IT infrastructure and systems administration.
• Experience within financial services, banking, trading or treasury environments.
• Proven experience managing mission‑critical infrastructure and applications.
• Experience operating within regulated and security‑focused environments.
• Ability to provide support to VIP stakeholders.
• Proficiency in Windows Server 2019/2022 (or equivalent), Red Hadoop, VMware vSphere / vCenter, Veeam Backup & Replication, Microsoft Office 365, PowerShell scripting, SQL Server administration, and networking fundamentals.

Location: SW1V 1SW, London, England, United Kingdom

Remote type: Hybrid (3 days in the office)

Start date: As soon as possible

Salary: £55,000 – £60,000

C# .NET Developer – Insurance

Our client is an insurance underwriter in the City of London looking to grow its software development team with a seasoned C# .NET developer.

Responsibilities:

• Develop complex software with C# and support the entire development lifecycle.
• Utilise Java, jQuery, Web API, CSS and advanced SQL Server (stored procedures, table design).
• Provide support for Microsoft Office Applications and design and build reports for SharePoint.
• Lead improvements to management information and analysis.
• Analyse requirements and deliver suitable solutions using the most appropriate technology.
• Document, support and upgrade a wide range of internal applications/processes.
• Produce ad‑hoc reporting and analysis of information in the data warehouse.
• Work both as part of a team and independently, communicating with all business areas.

Qualifications:

• 5–7 years of experience developing complex software with C#.
• Strong mathematical background (2:1 in maths or computer science or similar).
• Excellent communication and interpersonal skills.
• Proficiency in Visual Studio, Microsoft SQL Server, Office 365, SharePoint and related tools.
• Experience with Eclipse (for underwriting) and Sun (for accounts) is a plus.

Location: City of London, England, United Kingdom

Start date: As soon as possible

Salary: up to £50,000 (potentially higher for exceptional candidates); junior roles considered from £25,000 – £30,000.

Contract roles and jobs for Microsoft SQL Server

• Database Administrator – Manages and optimises SQL Server databases, ensuring performance, security and availability.
• Data Analyst – Uses SQL Server to query databases and transform data into actionable insights.
• Database Developer – Designs and develops queries, stored procedures and databases on SQL Server to meet business needs.
• Business Intelligence Consultant – Uses SQL Server for ETL and develops BI solutions tailored to businesses (PowerBI, SAS, Tableau).
• Research and Development Engineer – Designs and develops software solutions by integrating SQL Server databases to manage data efficiently.