Design Estimator
Design Estimator - Fire & Security Systems
Location: Abingdon - Hybrid
Salary: Competitive in industry + incentivised bonus
Trinity Fire & Security Systems is seeking a skilled Design Estimator to join our dedicated Design team, delivering high-quality solutions for nationally recognised organisations. This is a technically rewarding role where you will design bespoke fire and security systems and produce accurate, competitive quotations using industry-leading software such as Bluebeam.
You will manage projects from pre-tender through to post-tender, working closely with clients, sales, and project teams to ensure every solution is technically sound, commercially viable, and fully compliant with current standards and regulations. This is an excellent opportunity for an experienced Fire & Security professional looking to take the next step into a design-focused role.
What you’ll be doing
Quoting: Prepare detailed, accurate costings for fire alarm, CCTV, access control, intruder alarm, and other life-safety and security systems.
System Design: Develop compliant, tailored fire and security solutions that meet client requirements, industry standards, and regulatory guidelines.
Project Coordination: Work collaboratively with Sales, Project Management, and Engineering teams to ensure designs are practical, buildable, and aligned with Trinity’s quality standards.
Documentation: Maintain precise and up-to-date records of designs, quotations, and client communications within the CRM system.
Industry Awareness: Stay informed of emerging technologies, product developments, and changes in standards, legislation, and market trends.
What we’re looking for
You might already be an Estimator — or perhaps an Engineer ready to take the next step. You’ll have:
Knowledge of fire alarm systems and BS5839 standards.
A proactive, problem-solving mindset and a customer-first attitude.
Firequal Fundamentals certification or equivalent.
A full UK driving licence and willingness to travel when needed.
What Trinity Offers
Competitive base salary and Estimator bonus scheme
23 days’ holiday, increasing with service, plus bank holidays.
Employee Discount Programme – savings across 800+ retailers.
Car/Car Allowance
Salary Sacrifice Pension
3 x salary Life Assurance
Employee Assistance Programme.
Ongoing training and career development opportunities.
Equal Opportunities in Practice
We are committed to equality of opportunity for all staff and applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships.
Security Vetting
It is an industry requirement that successful candidates undergo security vetting. Offers of employment are subject to satisfactory vetting and may be withdrawn if the required standards are not met.
Ind1
- Division
- Trinity Fire & Security Systems
- Department
- Technical
- Locations
- Abingdon, National
- Remote status
- Hybrid
- Employment type
- Full-time
Current job openings - Across the division
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Design and Estimating Manager
Trinity Fire & Security Systems · Technical · Abingdon, Exeter · Hybrid
Why work for us?
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Competitive salaries
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Life Assurance
3 x salary
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Vivup discounts
Access to Vivup discount centre, which includes: Gym memberships, Major retailers, Holidays, Meals out, Electronics, Cinema tickets, Days out and much more
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Professional Development
Opportunities to progress within each company and across the wider group. There are many examples of our staff moving between businesses for professional progression and career development.
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Work for a rapidly growing industry leader
In 2024 PTSG was 25 businesses, employing just over 2200 staff. Today (2026) we're over 30 companies employing 3300 staff and the fastest growing organisation within our field.
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Access to Online GP Appointments
Access a GP 24 hrs a day for all those unexpected emergencies
Our Vision
Here within PTSG's Fire Solutions Division:
We’re building something bigger than a group of companies.
Our vision is to create the most capable, connected and trusted fire safety division in the UK — where specialist expertise comes together to deliver smarter, safer and more reliable solutions for our customers.
At the heart of that vision is our people. By investing in skills, creating clear career pathways, and opening up opportunities across multiple disciplines, we’re not just growing a business — we’re building careers that last.
About PTSG Fire Safety Solutions
PTSG Fire Solutions is part of Premier Technical Services Group (PTSG) — an award-winning UK leader in building safety and compliance services.
With over 3,000 colleagues, 30+ specialist businesses, and a customer base spanning more than 90,000 sites nationwide, PTSG delivers over 170 essential services across five key divisions: Fire Safety, Electrical Safety, Water Hygiene, Access & Safety, and Building Access & Specialist Services.
The Fire Solutions division brings together a group of expert businesses delivering everything from fire detection and suppression systems to passive fire protection, riser maintenance and specialist hygiene services. Together, we provide a complete, end-to-end approach to fire safety — supporting organisations across the UK to remain compliant, protected and operational.
As we continue to grow, we’re investing in our people, developing specialist skills, and creating long-term career opportunities across the entire division.
Join us and be part of a team that’s setting the standard for fire safety in the UK.