Gurugram, Haryana, India · On-site
Job ID - 36501 Function - DIO Job location - Gurgaon/Bangalore Job Type - Permanent Why we need this role We are seeking a Senior IT Infrastructure Engineer (Network) to act as a technical Subject Matter Expert (SME) acr…
Skills: Cisco Networking, Cisco ACI, F5 Load Balancing, Hybrid Cloud Networking, Network Segmentation
London, England, United Kingdom · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Consultative Skills, Account Management, Solution Sales, Product Suite Knowledge, Competitive Analysis
London, England, United Kingdom · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Internal Communications, Change Communications, Stakeholder Management, Strategic Planning, Narrative Development
London, England, United Kingdom · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: B2B Sales, Digital Infrastructure, Telco, IT Services, SaaS
London, England, United Kingdom · Remote OK
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Enterprise Sales, B2B Sales, Digital Infrastructure, Telco, IT Services
Barcelona, Catalonia, Spain · On-site
Short Description Function: Finance (CFO) Contract: permanent Location: Barcelona Why we need this role As a Senior Collections Specialist, you play a critical role in ensuring cash is collected efficiently and on time, …
Skills: Cash Collection, Account Reconciliation, Dispute Resolution, German Fluency, English Fluency
Frankfurt, Hesse, Germany · Hybrid
Why we need this role Based London or Germany The People Operations & Payroll Specialist will play a key role in delivering high-quality HR services across Germany, The Netherlands, Switzerland, and Romania. This role is…
Skills: People Operations, HR Administration, EMEA Payroll, HRIS, Workday
Koto, Japan · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Optical Transport Technologies, DWDM, ROADM, OTN, Network Troubleshooting
Japan · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Order Management, Carrier Coordination, Data Center Operations, Japanese Proficiency, Microsoft Excel
Koto, Japan · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Optical Transport Technologies, DWDM, ROADM, OTN, Network Troubleshooting
Gurugram, Haryana, India · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Consultant, IT servic…
Skills: Python, SQL, Power BI, RPA, Web Scraping
London, England, United Kingdom · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Cisco Networking, Cisco ACI, F5 Load Balancing, Hybrid Cloud Networking, Network Segmentation
United Kingdom · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Cisco Networking, Cisco ACI, F5 Load Balancing, Hybrid Cloud Networking, Network Segmentation
Gurugram, Haryana, India · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Why we need this role…
Skills: Analytical Ability, Numerical Ability, Attention To Detail, Verbal Communication, Written Communication
Barcelona, Catalonia, Spain · Hybrid
Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure. Short Description Fun…
Skills: Finance Administration, Collections, Accounts Receivable, Bank Reconciliations, Payment Allocations
Gurugram, Haryana, India • On-site
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Act as a technical SME to design, implement, and support secure, scalable network platforms across office, data center, and hybrid cloud environments. Focus on optimizing Cisco-based platforms, F5 load balancing, and ensuring network segmentation and security.
Requires strong hands-on experience with Cisco technologies, Cisco ACI, and F5 load balancing, with knowledge of routing protocols and hybrid cloud connectivity. Preferred qualifications include CCNP/CCIE certifications and experience with network automation tools.
Function - DIO
Job location - Gurgaon/Bangalore
Job Type - Permanent
We are seeking a Senior IT Infrastructure Engineer (Network) to act as a technical Subject Matter Expert (SME) across enterprise network services, supporting office, data centre, and hybrid cloud networking environments.
This is a hands-on engineering role focused on delivering resilient, secure-by-design, and high-performance network platforms using predominantly Cisco technologies, with exposure to Juniper and cloud-native networking. The role will be critical in ensuring network segmentation, security, and scalability across the organisation’s global infrastructure
Act as a technical SME for network infrastructure, including:
Office / campus networks, Data centre networking, Hybrid cloud connectivity (Azure, GCP)
Design, implement, and support secure, scalable network solutions across:
LAN / WAN / Data Centre / Cloud
Own and optimise Cisco-based network platforms, including:
Routing and switching, Cisco ACI (Application Centric Infrastructure), Policy-driven segmentation
Support and manage F5 load balancing platforms, including:
LTM configuration and optimisation, Traffic management and application delivery, High availability and failover design
Deliver secure-by-design network architecture, including:
Network segmentation and micro-segmentation, Zero Trust principles, Alignment to enterprise security controls
Design and support hybrid networking solutions, including:
Connectivity to Azure and GCP
VPN and private connectivity models (e.g. ExpressRoute, Interconnect)
Troubleshoot and resolve complex network incidents and performance issues across multi-layer environments
Drive network automation and standardisation to improve operational efficiency
Produce and maintain high-quality network documentation, including:
High-level and low-level designs, Network diagrams, Runbooks and operational procedures, Configuration standards
Collaborate with:
Security teams (segmentation, network security controls)
Cloud engineering teams
Platform and infrastructure teams
Participate in the on-call rota to support critical network incidents
Required Skills & Experience
Strong hands-on experience with:
Cisco networking technologies (core requirement)
Data centre networking and Cisco ACI
F5 load balancing platforms
Experience with:
Juniper networking technologies (desirable)
Hybrid cloud networking (Azure and/or GCP)
Deep knowledge of:
Network segmentation and secure network design
Routing and switching protocols (e.g. BGP, OSPF)
Layer 4–7 load balancing concepts
High availability and resilient design
Proven ability to design, implement, and support enterprise-scale network environments
Strong troubleshooting experience across:
LAN
WAN
Data centre fabric
Hybrid cloud connectivity
Shape
✅ Technical Competencies
Recognised as a network SME within the team
Ability to lead complex technical delivery and problem resolution independently
Strong understanding of:
Secure-by-design networking
Network segmentation strategies (macro and micro segmentation)
High availability, resilience, and fault tolerance
Hands-on experience implementing and operating Cisco ACI environments
Ability to contribute to design decisions in partnership with architecture teams
✅ Behavioural & Professional Skills
Ownership & Accountability: Takes responsibility for network stability, performance, and security
Technical Leadership: Influences engineering standards and solutions without direct line management
Security Focus: Embeds secure-by-design principles into all network solutions
Collaboration: Works effectively across infrastructure, security, and cloud teams
Communication: Clearly articulates technical concepts and designs
Continuous Improvement: Drives optimisation, automation, and simplification initiatives
✅ Preferred Qualifications
Certifications such as:
Cisco (CCNP / CCIE)
F5 certifications
Cloud networking certifications (Azure / GCP)
Exposure to:
Network automation tools (Ansible, Terraform, etc.)
Container networking and modern application delivery
The global digital infrastructure company that creates extraordinary connections to help your business succeed.
Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed. Powered by amazing people and like-minded partners, Colt is driven by its purpose: to put the power of the digital universe in the hands of its customers, wherever, whenever and however they choose. Since 1992, Colt has set itself apart through its deep commitment to its customers, growing from its heritage in the City of London to a global business spanning 40+ countries, with over 6,000 employees and more than 80 offices around the world. Colt’s customers benefit from expansive digital infrastructure connecting 32,000 buildings across 230 cities, more than 50 Metropolitan Area Networks and 250+ Points of Presence across Europe, Asia, the Middle East, Africa and North America’s largest business hubs. Privately owned, Colt is one of the most financially sound companies in the sector. Obsessed with delivering industry-leading customer experience, Colt is guided by its dedication to customer innovation, by its values and its responsibility to its customers, partners, people and the planet. For more information, please visit www.colt.net
Offices: Colt House, 20 Great Eastern Street, London, EC3A 3EH, GB · Culliganlaan 2H, Diegem, 1931, DE · Gervinusstr 19-22, Frankfurt, Deutschland 60322, DE · Viale Edoardo Jenner 56, Milan, Italy 20159, DE · 3-1-35 Shibaura, Tamachi Ekimae Building, Minato,, Tokyp, 108-0023, DE
The global digital infrastructure company that creates extraordinary connections to help your business succeed.
Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed. Powered by amazing people and like-minded partners, Colt is driven by its purpose: to put the power of the digital universe in the hands of its customers, wherever, whenever and however they choose. Since 1992, Colt has set itself apart through its deep commitment to its customers, growing from its heritage in the City of London to a global business spanning 40+ countries, with over 6,000 employees and more than 80 offices around the world. Colt’s customers benefit from expansive digital infrastructure connecting 32,000 buildings across 230 cities, more than 50 Metropolitan Area Networks and 250+ Points of Presence across Europe, Asia, the Middle East, Africa and North America’s largest business hubs. Privately owned, Colt is one of the most financially sound companies in the sector. Obsessed with delivering industry-leading customer experience, Colt is guided by its dedication to customer innovation, by its values and its responsibility to its customers, partners, people and the planet. For more information, please visit www.colt.net
Offices: Colt House, 20 Great Eastern Street, London, EC3A 3EH, GB · Culliganlaan 2H, Diegem, 1931, DE · Gervinusstr 19-22, Frankfurt, Deutschland 60322, DE · Viale Edoardo Jenner 56, Milan, Italy 20159, DE · 3-1-35 Shibaura, Tamachi Ekimae Building, Minato,, Tokyp, 108-0023, DE
