About Us

We have extensive knowledge of security, threats, and mitigation processes. With many years of experience in challenging and demanding environments, we are well-versed in crisis and risk management techniques. We have held advisory roles for government, defence, and commercial clients.

Experience and reputation have been built through active operations in both permissive and non-permissive environments worldwide. We deliver training and advice at all levels, offering comprehensive training, risk consultancy, and protection services to high-value clients and companies.

Our consultancy is a collaboration of specialists in training, security and risk management. This collaboration allows us to provide our clients with a comprehensive solution. By incorporating and collaborating with all invested stakeholder departments, we can fully understand, identify, and effectively mitigate risks.

RS4 Group Ltd's core consists of specialists from various backgrounds, including governmental agencies, military and defence, law enforcement, fraud investigation, finance, geopolitical analysis, behavioural analysis, law, protective security, cyber security, security training, compliance, and insurance.

We assist corporate clients with all their security needs by offering a wide range of services, including security architecture, physical security surveys, risk assessments, threat analysis, crisis response,  risk management, and insider threat programs.

MEET OUR TEAM

Colin Bell MSyl Cert Ed

Training & Development Director
& Founder

Colin Bell is a senior training consultant and international security specialist with over 30 years of operational experience in the military and high-risk environments. A former Royal Marine Commando, Colin has worked globally in training and close protection roles including hostile and diplomatic close protection, supporting UK government agencies, NGO's, media organisations, and training international military forces.


Colin has designed and delivered security training in over 15 countries, including Iraq, Ethiopia, Algeria, Tunisia, Qatar, Ukraine, Kenya, Sudan, South Sudan, Nigeria, Bangladesh and Kingdom of Saudi Arabia. He has led the development of accredited programs such as Highfield Level 3 HEAT and Level 3 SAFE courses, including our suite of Travelsafe courses and recently helped train specialist security officers in core and advanced security skills in the Middle East. His clients include the UK Foreign Commonwealth & Development Office (FCDO), UK MOD, UK Embassy staff overseas, the Home Office, the BBC, ITV, freelance journalists and various humanitarian organisations operating in fragile and complex regions.


His expertise includes:

Hostile environment awareness training (HEAT/HEFAT/SAFE)

Diplomatic, hostile and executive close protection

Military and tactical firearms training,

Crisis response, journey management, and risk mitigation

Security curriculum design and development

Female-focused safety and self-defence training

Design and delivery of travel safety.

Colin holds a Level 4 Certificate in Education and Training, is a Hostile/executive close protection instructor (Highfield/Pearson's approved CP trainer), military instructor, Self defence and physical intervention instructor and maintains active SC clearance. Known for his calm leadership, cultural adaptability, and deep operational insight, Colin plays a key role in helping clients prepare for and operate safely in complex environments worldwide. 

Martin McColl

Operations Director

& Founder

Martin McColl is an accomplished security operations leader with over 20 years of experience in military and high-risk private sector environments. His career began with a distinguished 14-year service in the British Army, where he operated in frontline roles across Northern Ireland, Iraq, Afghanistan, Kosovo, and Sierra Leone. During this time, he led small teams under pressure, gaining deep expertise in planning, logistics, and field leadership.


After his military career, Martin moved into senior positions in global security and risk management, working with clients in corporate, media, and humanitarian sectors. He has designed and managed security strategies in volatile regions and led high-stakes operations, including global 24/7 operations and personnel oversight in conflict zones.


Martin’s core expertise includes:

Crisis response & incident management

Threat and risk assessment

Protective operations for high-risk travel

Surveillance & intelligence-led operations

Security planning for NGOs and media teams

Known for his calm, decisive leadership and strong interpersonal skills, Martin consistently delivers practical, risk-aware solutions that safeguard people, operations, and reputation. He holds advanced qualifications in covert surveillance, emergency care, risk consultancy, and crisis leadership.


Martin is also a mentor and trainer, passionate about developing teams and improving operational resilience in complex and hostile environments.


WORKING TOGETHER

Reasons to work with us.

Professional

Our trainers and specialists are recognised authorities in security, risk, crisis, and disaster management. Each professional is fully qualified and accredited.

Compliant

RS4 Group Ltd is fully compliant with UK and international laws and regulations. We also advise others in the industry on how to achieve these high standards.

Diligent

Diligence is essential at all times. We provide our clients with critical and reliable intelligence and data, enabling them to make informed and low-risk decisions.

Flexible

Every service can be completely customised to meet the needs and requirements of our clients.

Collaborate

We believe in collaboration to enhance knowledge, standards, services, and overall capabilities. This is not just for the benefit of our clients and employees, but for the Private Security Industry as a whole.

Innovate

Collaboration drives innovation. Through our team of specialists, we keep our clients updated on trusted methodologies and technologies to provide cost-effective solutions at all times.

Accelerate

Our specialists possess extensive global operational experience, often anticipating clients' needs. This enables our clients to swiftly predict and enhance their capacity to respond, manage, and accelerate recovery from any threat or crisis.