AWS Cloud Security Engineer

InvestedintheMission; Manchester; On-site; GBP 60,000 - 80,000; Full time

Benefits offered by this job

Private medical insurance

Pension contributions

Equity participation

Job summary

Mark43 is seeking an AWS Cloud Security Engineer to join our team in Manchester. You will own vulnerability and threat management for an environment supporting law enforcement and emergency services, working closely with a US-based Cybersecurity team.

This is a hands-on role with on‑site security presence in the Manchester office. You’ll run the vulnerability program, respond to incidents, and help harden AWS configurations.

Qualifications

• Minimum of 5 years of experience in cybersecurity with a focus on vulnerability management, threat research, and cloud security.
• Experience with cloud environments, particularly AWS, and familiarity with vulnerability scanners, endpoint protection, and SIEM tooling.

Responsibilities

• Run end-to-end vulnerability management across cloud infrastructure, networks and applications with prioritization by risk.
• Research emerging threats and translate intelligence into actionable guidance on patches and hardening.
• Lead security incident responses, triage and contain issues, coordinate with the Cybersecurity team, and document post-incident reviews.
• Review AWS security configurations and harden controls per best practices.
• Provide on-site IT support in the Manchester office and assist with day-to-day needs as the security presence.
• Participate in on-call rotations to respond to incidents outside office hours.

Skills

Vulnerability management

Threat research

Cloud security

AWS

Incident response

SIEM

On-site IT support

Tools

Vulnerability scanners

Endpoint protection

Job description

Applicants must be authorized to work for any employer in the country in which the role is being hired. We are unable to sponsor or take over sponsorship of an employment visa at this time.

Mark43's mission is to empower communities and their governments with new technologies that improve the safety and quality of life for all. We build powerful, scalable, and elegant software that sets a new standard for the tools upon which first responders rely. Our users are diverse, and we are committed to embracing diversity of thought and experience within our team.

We are looking for a AWS Cloud Security Engineer to join our team in Manchester. You will own vulnerability and threat management for an environment where the stakes are real; the software you help protect supports law enforcement and emergency services across the US and UK. This is a hands‑on, execution-focused role: you will run a serious security program, respond to real incidents, and be the on‑the‑ground security presence in our Manchester office, working closely with a wider Cybersecurity team based in the US.

What You’ll Do

• Driven our vulnerability management program end to end: running scans across cloud infrastructure, networks, and applications, prioritizing findings by risk, and tracking remediation through to closure.
• Researched emerging threats relevant to our environment, turning threat intelligence into clear, actionable guidance on what to patch, watch, or harden next.
• Led the response to a security alert: triaging it, containing the issue, coordinating with the wider Cybersecurity team, and writing up the post‑incident review so we are stronger next time.
• Reviewed cloud security configurations across our AWS environment, identifying misconfigurations and hardening controls in line with security best practices.
• Supported colleagues in the Manchester office with day‑to‑day IT needs such as account access, hardware, new starter setup, as the on‑site technical presence.
• Taken your turn on the on‑call rotation, ready to respond when a critical security incident does not keep office hours.

What You’ll Need

We are looking for a cybersecurity professional with a minimum of 5 years of experience, with a strong focus on vulnerability management, threat research, and cloud security. You have the judgement that comes from time in the field: you know which vulnerabilities to escalate, how to run an incident calmly under pressure, and when to ask for help. Experience with cloud environments, particularly AWS and familiarity with vulnerability scanners, endpoint protection, and SIEM tooling are important. An awareness of UK data protection requirements and frameworks such as Cyber Essentials or ISO 27001 is a plus. Solid general IT support skills across Windows environments and networking matter too, since you will be the on‑site technical resource in Manchester. You should be comfortable on an on‑call rota and collaborating across time zones.

Security Clearance

Given the sensitive nature of the work we do and the law enforcement agencies we serve, the successful candidate will be required to obtain and maintain NPPV3 and SC (Security Check) clearance. We will support you through the process, but please note that an offer is conditional upon successfully obtaining the required clearances. This typically requires a minimum of 5 years' recent UK residency so please raise eligibility questions with us during the process.

Who Thrives Here

• Hands‑on and execution-focused. You are more comfortable running a vulnerability program than writing a policy about one. You get things done.
• Calm and decisive under pressure. When an incident hits, you hold steady, work the problem methodically, and make sensible calls with imperfect information.
• Self‑directed and dependable. As the senior security presence in the Manchester office, you take ownership without waiting to be told and follow through so colleagues can trust that things are handled.
• A clear communicator. You can explain a security risk to a senior leader and help a colleague with an access issue in the same afternoon, adjusting how you communicate to whoever is in front of you.

Location & Logistics

This role is based in our Manchester office, on‑site 3 days per week.

Compensation

We are offering £60,000–£80,000 per year depending on experience, plus Mark43's benefits package including private medical insurance, pension contributions, and equity participation.

Mark43 is approved to hire in Canada, the UK, and 36 U.S. states, including Alabama, Arizona, California (excluding San Francisco), Colorado, Connecticut, Washington D.C., Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, North Carolina, Nebraska, New Hampshire, New Jersey, New Mexico, New York, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Vermont, Washington, Wisconsin, and West Virginia. Before applying to a remote role, please ensure that you are able to perform the position in one of the states listed above. State locations and specifics are subject to change as our hiring requirements shift.

Our Privacy Notice describes how Mark43 uses and protects the personal information of prospective employees during the recruitment process. It informs you about our handling of the personal information you provide to us when you apply for a position in our organization and in general when you express your interest in joining our team.

As a part of Mark43's security measures all employees must: Engage in appropriate use of the company's electronic information resources; Become knowledgeable about and follow relevant security policies and guidelines; Protect the resources under their control, such as passwords, computers, and data that they create, receive, or download; and Promptly report security-related incidents and violations, and responding to official reports of security incidents involving their systems or accounts.

Mark43 is committed to the full inclusion of all qualified individuals. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information. As part of this commitment, we will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed, please email [e-mail] requesting the accommodation.