Our Team

Meet Our Team

Nathan and the team are passionate about technology – that’s the difference; they have a genuine interest in the products and services they deliver, coupled with a customer-centric delivery model.


Managing Director

Nathan Cayirylys started in the security trade in Moree, NSW in 1991 as an apprentice radio fitter mechanic for North West Security, having shown a natural aptitude for working with technology. He moved to Newcastle in 1998 and subcontracted his services to a number of security companies before moving into the manufacture of high-end security products. Through working in security manufacture Nathan acquired an in-depth knowledge of cryptology and secure issuance which played an important role in the design of the Defence DCAC (Defence Common Access Card) system.

Nathan is a natural born problem solver who thrives on the challenge of a complex project. The ever-evolving security technology landscape ensures that Nathan stays abreast of the latest developments and how they can be implemented in industrial, commercial and domestic environments. By combining a results-driven approach with a genuine passion for security technologies and strong third-party relationships, Nathan is able to develop customised solutions for his clients according to their budget and operational needs.


Business Development Manager

Bernadette joined EST in 2021 to support the company as it moves into an expansion phase. With nearly 20 years experience in accounting, finance and governance, Bernadette brings a wealth of experience to her role as well as a passion for continuous improvement. Her roles encompasses many aspects of the business from staff inductions to business development, social media engagement and the development of best practice policies and procedures. Bernadette's keen eye for detail is highly valued and her finance and accounting qualifications provide a sound basis for ensuring EST's compliance needs are met.

Bernadette is a member of CPA Australia and the Australian Institute of Company Directors. She also holds a Cert IV in Training and Assessment and has completed ASIST and Accidental Counsellor certifications with Lifeline Hunter and Central Coast.


Senior Security Technician

With a strong background in project and team management, Steve joined the EST team in January 2017 and hit the ground running. With his natural aptitude for people and safety management Steve has implemented procedures for safety in the workplace, and strategies to improve efficiency and productivity within the team. Although not from an electronics and computing background, Steve has embraced the mechanics of electronics and security, and demonstrates a keen eye for detail and quality workmanship on every job he manages.

Steve is a qualified welder and holds a forklift licence; both a testament to his love of learning new skills, and keenness to be more equipped for industrial projects.


Sales Manager & Technician

Jason joined EST in 2020 and boasts a unique skill set owing to a diverse career history working across roles including tradesman, police officer, and business owner. A trade certified Refrigeration and Air Conditioning Mechanic, Jason has quickly adapted to the security and technology industry. His management skills, reliability and commitment to quality workmanship are an asset to the team.



Starting in mid-2019 as an apprentice, Trey has shown a natural aptitude towards his trade and in 2022 became a qualified technician having completed his Cert III in Telecommunications & Electronics. He is very thorough, methodical and takes to his work with enthusiasm and a high attention to detail. Trey is growing into a resilient problem solver as he has a natural curiosity about how things work.

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Contact Electronic Security Technologies and our team can tailor solutions to meet the needs and requirements of your organisation.

Need a customised solution for your commercial or business premises? Contact us today for a tailor-made solution that protects your assets and caters to your needs.

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