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.
Company vehicle
Pension via Royal London, Life Assurance, and Employee Assistance Programme
Referral bonus of up to £2,000.
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
Trinity’s mission statement is simple - to provide high quality design, installation, commissioning and long term after care of Fire Detection, Fire Suppression, Life Safety and Security systems.
Trinity are one of the largest independent Fire, Life Safety & Security systems Integrators with regional offices across the UK providing a local service to National customers and the Trinity brand is widely recognised for the high quality service we deliver. The company is focused on developing long term customer relationships whereby our Technical Engineering teams and highly experienced Management & Administration teams are dedicated to supporting our clients.
We pride ourselves on delivering the highest quality of workmanship in order to meet the exacting standards and best practices within our industry. Our wealth of third party accreditation's and endorsements, including LPS 1014; BAFE SP201, LPS 1204 and BAFE SP101, are YOUR assurance that we meet the highest possible standards
Whatever the size or type of your business, Trinity Fire & Security Systems can give you the expert advice and service support that you need to ensure you are fully Compliant with the latest legislative requirements.
Why Trinity? Because we CARE!
