Senior Project Engineer (Unified Communications)

Why Join Us?

Onecom is the UK's leading business technology provider, shaping the way we work, connect, communicate and operate.

You will join a multi-award-winning company, with over 800 talented people committed to delivering great customer experiences driven by the Onecom Way; Think Kaizen, Be Respectful, Build Relationships, Make it Happen, Work Smart, Be Amazing.

About the role

We’re looking for an experienced, customer-focused Senior Project Engineer to join our Professional Services team.

You’ll take the technical lead on a range of customer projects across Unified Communications, Collaboration and Modern Workplace, designing, deploying and transitioning solutions into support.

Working closely with Project Managers, Consultants, customers and third-party partners, you’ll make sure projects are delivered to a high standard, on time and within scope.

This is a great opportunity for an experienced engineer who enjoys combining hands‑on technical delivery with customer interaction, particularly someone with strong experience of VoIP platforms and Linux‑based operating systems.

What you'll be doing

Delivering customer projects

• Manage multiple technical project workstreams and deliver against agreed timescales.
• Take part in discovery workshops and requirements‑gathering sessions.
• Produce implementation plans, migration strategies and technical documentation.
• Deliver solutions in line with agreed scope, quality standards and best practice.
• Support the smooth handover of completed projects into Managed Services and operational support teams.

Designing and implementing solutions

• Configure and support 3CX and Zoom solutions.
• Configure and troubleshoot Session Border Controllers (SBCs) and SIP.
• Support migrations from legacy PBX and telephony platforms.
• Troubleshoot complex technical issues throughout project delivery.

Working with our customers

• Act as a trusted technical advisor throughout the project lifecycle.
• Lead customer workshops, technical reviews and solution demonstrations.
• Communicate project progress, risks and technical challenges clearly and confidently.
• Build strong relationships with technical and non-technical customer stakeholders.

Providing technical leadership

• Provide guidance and mentoring to Project Engineers and junior colleagues.
• Contribute to technical standards, templates and delivery methodologies.
• Participate in technical design reviews and support pre‑sales activity where required.
• Identify opportunities for automation and continuous service improvement.
• Keep up to date with emerging technologies and industry best practice.

What we're looking for

You’ll ideally have strong knowledge and hands‑on experience across:

• SIP and VoIP
• PSTN connectivity
• DNS
• TCP/IP networking
• Quality of Service (QoS)
• Delivering customer‑facing technical projects
• Troubleshooting complex technical issues
• Producing clear technical design and implementation documentation

You’ll be someone who is

• Customer-focused and confident working with stakeholders.
• Organised and comfortable managing multiple priorities.
• Proactive, analytical and solutions-focused.
• Able to work independently while collaborating effectively with others.
• Detail‑oriented, particularly when it comes to technical delivery and documentation.
• Happy to share your knowledge and support the development of colleagues.
• You’ll also have strong written and verbal communication skills and be comfortable explaining technical topics to a range of audiences.

Perks for our people

Holidays : 25 days + bank holidays and buy/sell options

Other Leave : Birthday day off, 12 paid hours for flexible use, Volunteer day

Lifestyle : 9% combined pension contribution and 4x salary life assurance

Rewards : Quarterly and annual employee awards, discounts on tech

Socials : All-expenses-paid company events

Development : In-House Training Academy

Wellbeing : 24/7 access to mental health support, Calm App, discounted gym membership, free breakfast & fresh fruit, eye-care vouchers, financial wellbeing support

Everyone belongs at Onecom

We believe that diverse teams bring a range of experiences and better ideas that fuel innovation. That’s why we’re committed to creating an environment where everyone feels valued, respected, and able to bring their authentic selves to work. We welcome applications from people of all backgrounds, experiences, identities, and perspectives.

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