Senior Consultant, Positioning Navigation and Time (PNT)

Full Time | £49,551.00 - £57,809.00 (Dependent on experience)

Hybrid working - Southampton

About the Role:

As a recognised subject matter expert (SME), with significant experience and understanding of the PNT domain, you will be responsible for developing, delivering and supporting innovation, project and operational activities for PNT.

Collaborating across OS, government, academia and industry you will be required to develop and support national and business strategic plans across innovation and operations within the PNT domain whilst informing our PNT strategy

Supporting the OS Positioning, and on occasion the Geodesy teams, you will provide operational support for delivery of our PNT commitments that will require you to be available 24/7 for agreed duty periods. Your experience and understanding of PNT will enable you to work independently and alongside other national domain experts as you support our key customers.

Developing PNT capability will require your detailed understanding of global navigation satellite systems (GNSS) and other PNT services to determine the best approach to develop and innovate current and new operational capabilities.

Reporting into the Lead PNT Scientist, your expertise will be required to support our other positioning and geodesy consultants, research and data scientists, and product teams as we work together to deliver sustainable operations and capability growth.

Please note: This role will require you to meet the criteria for Developed Vetting, in this case you should have resided in the UK for the past 10 years. You must meet the security requirements before you can be appointed.

Here is a snapshot of the technologies that we use:

Trimble Pivot Platform, Leica Infinity, Python, GNSS hardware including geodetic grade receivers and RTK receivers, GNSS software processing tools (e.g. RTKLib), spectrum analysers, software defined radios, atomic clocks

What we are looking for:

Your application will be assessed across four areas, with essential criteria for the role within each category:

Qualifications:

• A recognised domain expert and ideally educated to master’s degree level in PNT or a related subject. Experience in lieu of a degree is also acceptable.
• Ideally a member (or applying to be a member) of an applicable professional body, e.g RIN, RICS

Knowledge & Skills:

You must have:

• Detailed and strong working knowledge of PNT systems and services which will enable you to understand and deliver OS’s PNT operational tasks and services
• In-depth knowledge and experience of the full GNSS signal-processing chain and understanding of PNT system integration 
• Comprehensive awareness of GNSS threats and vulnerabilities
• Track record in commissioning and delivering small projects and proof of concepts
• Must be willing, and feel that they would be successful, to meet the requirements of a national security clearance at Developed Vetting (DV) level
• Detailed understanding of PNT with the ability to develop strategic aims into operational contexts and technical solutions

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Behaviours:

• Proven ability to build and maintain excellent working relationships and manage stakeholders
• Ability to communicate clearly to those with different skills and understanding of your technical domain
• Working within teams to help colleagues and build strong partnerships
• Taking the initiative, being adaptable and responsible for results - finding new ways to improve processes

Experience:

• Recognition as a PNT SME.
• Experience of PNT data analysis and report production
• Experience working with GNSS systems within test, evaluation and development environments
• Experience of developing and leading equipment and system trials
• Experience working within secure environments
• Experience reviewing strategic targets to develop tactical outcomes
• Consultancy experience

Our Principles   

At OS, how we work matters just as much as what we deliver and will be guided by our three principles to assess competence during the hiring process looking for alignment in how you:  

• Clear the path – Cut the noise, simplify and remove blockers so work can move at pace  

• Seek the story – Listen fully, build understanding, fact‑check assumptions and speak up  

• Do what matters – Focus on value, make deliberate stop/start/continue decisions, and recognise the contribution of others  

The rewards

We want you to love what you do and feel supported to do your best work.

Our benefits include:

• Competitive salary and pension (OS contribute up to 12.07%)
• Performance‑related bonus (where applicable)
• 28 days annual leave plus bank holidays (increasing with service)
• Enhanced family leave, including paid partner leave
• Hybrid and flexible working options
• Learning and development support, coaching and mentoring
• Free subscription to OS Maps and access to wellbeing support
• Volunteering leave and matched fundraising

Location & working pattern

We embrace a hybrid working model at OS and understand there is no one size fits all in relation to how we work. We have a fantastic HQ in Southampton, Hampshire where you will be required to spend a minimum of 50% of your time, or on offsite visits, with the remaining time being a personal choice as to whether you work from home or spend more time at OSHQ.

Security & eligibility 

Please Note: This role will require you to meet the criteria for Developed Vetting, in this case you should have resided in the UK for the past 10 years. You must meet the security requirements before you can be appointed.

OS conducts pre-employment checks for anyone made an offer of employment, including identity, right to work, employment history and criminal record checks (via Disclosure & Barring Services (DBS)). 

This role requires the right to work in the UK at the time of application.  Unfortunately, OS cannot provide visa sponsorship for this position.

How to Apply 

• Please include an up-to-date CV and covering letter.

Closing date: Thursday 12 November 2026 at 23:59pm 

If you have any questions about the role, please contact Steve Hancock the people leader for this vacancy. If you have any questions about the recruitment process, please contact the resourcing team at careers@os.uk

Inclusion at OS

Research shows that people from underrepresented groups often hesitate to apply unless they meet every requirement. At Ordnance Survey, we’re committed to building a diverse, inclusive and welcoming workplace.

If this role excites you but your experience doesn’t match every point, we encourage you to apply. You may be the right person for this role or another opportunity at OS.

We are happy to consider any reasonable adjustments that people may need during the recruitment process, and you will be asked whether you require any during the application process.

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Skills required for this role: