Consultant - Optical Network Engineering
JP
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- Optical Network Engineering
Job ID: 36369
Job Location: Tokyo, Japan
Function: Chief Operations Office
Sub Function: Engineering
Job Level: S2 Core
Employment Type: Full Time
Why we need this role
We are seeking Optical Network Consultant in the network planning team who will ensure Colt’s optical network has the right capacity and capability in the right locations at the right time, supporting strategic planning, proactive capacity management, forecasting, and on-time service deliver. This role goes beyond hands‑on engineering and also focuses on sales & customer‑facing engagement, solution guidance, and technical leadership for the local engineering team.
What you will do
Support Sales and Service Delivery at pre‑sales and delivery stages for capacity checks, feasibility assessments, and technical inputs.
Act as the primary technical consultant for Sale and Service Delivery on optical network solutions, capacity strategy, and delivery feasibility.
Lead customer and partner discussions on optical architecture- handoff options, resilience, capacity evolution, and future‑ready designs.
Monitor optical network utilization, performance trends, and capacity thresholds to identify bottlenecks early and avoid service delivery impact.
Forecast demand using historical trends, run‑rate data, and sales pipeline visibility to plan proactive capacity builds.
Trigger proactive and reactive capacity expansions, ensuring the right balance between justified investment and delivery timelines.
Coordinate with Supply Chain, Vendors, Implementation and Field teams to secure timely delivery of fibre, electronics, site infra, and licences.
Identify optimisation opportunities to recover unused capacity, reduce costs, and improve network efficiency.
Maintain planning rules, design inputs, and deployment standards for Ciena and Nokia optical platforms.
Track end‑to‑end capacity delivery plans, risks, dependencies, and ensure commitments to the business are met on time.
Define and maintain KPIs, dashboards, and reporting to measure performance, improvements, and alignment with business objectives.
What we're looking for
Must haves:
- Business level Japanese and English skill
- Strong senior‑level expertise in DWDM/OTN technologies (Ciena, Nokia, Fujitsu, ADTRAN or equivalent).
- Proven experience engaging directly with customers, sales teams, and service delivery in a technical advisory role.
- Deep conceptual understanding of optical network architecture, ROADM‑based systems, transponders, and photonic design principles.
- Experience guiding network planning and design decisions, including capacity strategy, resilience models, and technology choices.
- Strong stakeholder management skills, able to influence Sales, Service Delivery, Engineering, Architecture, and Leadership.
- Ability to balance technical depth with clear, business‑focused communication.
- Experience driving optimisation initiatives such as capacity reuse, license optimisation, and asset recovery.
- Confidence operating as a senior individual contributor, providing direction without line‑management responsibility.
- Experience in driving improvements through technology innovation, network optimization, and process enhancement.
- Ability to support large expansion or transformation projects (overlays, subsea upgrades, proactive builds, node exits, regulatory projects).
Might haves:
- Exposure to automation and digitalisation of planning processes, including AI‑driven forecasting and automated monitoring.
- Experience improving end‑to‑end capacity delivery processes, reducing lead times, defining SLAs, and standardising deployment guidelines.
- Knowledge of designing customer‑specific optical solutions and bespoke delivery requirements.
- Experience with network functional testing, benchmarking, failure reproduction, and issue validation.
- Technical /Conceptual knowledge of SDN Orchestrator platforms such as for service provisioning over multivendor optical environments.
What we offer you:
Looking to make a mark?
At Colt, you’ll make a difference. Because around here, we empower people. We don’t tell you what to do.
Instead, we employ people we trust, who come together across the globe to create intelligent solutions.
Our global teams are full of ambitious, driven people, all working together towards one shared purpose: to put the power of the digital universe in the hands of our customers wherever, whenever and however they want.
We give our people the opportunity to inspire and lead teams, and work on projects that connect people, cities, businesses, and ideas. We want you to help us change the world, for the better.
Diversity and inclusion
- Inclusion and valuing diversity of thought and experience are at the heart of our culture here at Colt. From day one, you’ll be encouraged to be yourself because we believe that’s what helps our people to thrive. We welcome people with diverse backgrounds and experiences, regardless of their gender identity or expression, sexual orientation, race, religion, disability, neurodiversity, age, marital status, pregnancy status, or place of birth.
Most recently we have:
- Signed the UN Women Empowerment Principles which guide our Gender Action Plan
- Trained 60 (and growing) Colties to be Mental Health First Aiders
- Please speak with a member of our recruitment team if you require adjustments to our recruitment process to support you. For more information about our Inclusion and Diversity agenda, visit our DEI pages.
Benefits
Our benefits support you through all parts of life, for both physical and mental health.
- Flexible working hours and the option to work from home.
- Extensive induction program with experienced mentors and buddies.
- Opportunities for further development and educational opportunities.
- Global Family Leave Policy.
- Employee Assistance Program.
- Internal inclusion & diversity employee networks.
A global network
- When you join Colt you become part of our global network. We are proud of our colleagues and the stories and experience they bring – take a look at ‘Our People’ site including our Empowered Women in Tech.
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