
Our focus at Atom is ensuring we provide simple and cost-effective services to those who wish to contract or freelance in the UK and internationally.
To that end, we offer Atom Freelance and Atom International, the banners under which we offer our Umbrella Company, Construction Industry Scheme, and international payroll services.
We use up-to-date technology and have a team of highly experienced staff who ensure our clients are free to enjoy the flexibility of the contracting and freelancing lifestyle.
Please email info@atomhub.co.uk to speak to the team about our services.


We exist to Create a Legacy that Values All People and Creates Opportunities for Generations to Come - joining Arch will support this mission.

Your trusted and compliant partner for your Umbrella PAYE, CIS and outsourced payroll requirements.
Payshield Umbrella Services offers straightforward, transparent, and compliant outsourced services to recruitment agencies and end hirers

Omnia is your professional, compliant Payroll Partner providing a range of outsourced services to help with the management, retention and well-being of your temporary contractors and permanent staff. Omnia are also FCSA accredited for both CIS and Umbrella PAYE.

NASA Group is a specialist umbrella supplier based in Bristol, working exclusively within the contracting industry nationwide.
As well as being one of the most cost-effective in the industry, we pride ourselves on offering far greater value for our agency partners thanks to the unique way in which we collaborate with them. Rather than a typical ‘one-size-fits-all’ solution, we always ensure that our process is perfectly aligned with theirs so that the entire operation is as efficient as it can be. This benefits everyone in the supply chain including the recruitment agency, by enabling them to spend more time recruiting rather than payroll processing and problem-solving. It also allows the contractor to work more effectively as they fully understand the process and have far fewer questions or concerns. NASA Group goes above and beyond their duty as an employer.
This commitment continues throughout the entire agency relationship as we remain at the forefront of compliance and industry updates. Training agency staff on solutions and legislation is all part of the service, plus NASA Group will assist your business in preparing for legislative changes affecting your sector too. This helps to create a partnership far more valuable than a typical umbrella supplier.
We are always on hand to discuss how we can assist you, plus with regional account managers throughout the UK, we would be glad to talk in person too.


Oasis, with its wealth of knowledge and expertise in both accountancy and umbrella, offer contractors and recruitment partners a hassle-free and compliant approach to getting paid, whilst always delivering a quality service. To demonstrate our commitment to compliance we are accredited by both FCSA and Professional Passport and are affiliate members of ACCA. Our long-term agency relationships have been built on trust, unparalleled service, and proactive support. Our bespoke services, tailored to your specific requirements and in a world of ever-changing legislation, we aim to provide you with the most up to date guidance and advice. Passionate and committed to driving up standards, Oasis keeps the supply chain risk free by paying all taxes and associated payments on time.

Clockwork Contracting – Precision in Payroll, Excellence in Service
Clockwork Contracting is a proud, certified member of SafeRec—one of the first umbrella companies to achieve this certification. We are committed to continuous improvement, always seeking innovative solutions that elevate industry standards for the benefit of contractors and agencies alike.
Why Choose Clockwork?
Low Contractor Fees – Unlike many competitors, we keep costs fair by forgoing large sales teams, relying instead on the trust and recommendations of our clients and contractors. This means overheads are lower and savings can be passed to our contractors. Seamless Payroll Experience – Our focus is on delivering a smooth, efficient, and hassle-free payroll service from start to finish. Swift Problem Resolution – We understand that errors can be stressful. That’s why we prioritise rapid response times with short SLAs, ensuring that mistakes become swift solutions.
At Clockwork Contracting, we don’t just provide payroll services—we set the standard for reliability, efficiency, and professionalism.