Senior Cybersecurity Engineer, Managed Services

Who We Are

Ready to make a real impactincybersecurity? At Critical Start,we'renot just protecting organizations;we'reredefining howit'sdone.

We'rea team united by an inspiring purpose: to stop breaches, simplify security, and shape the future of cyber defense. Ifyou'repassionate about cutting-edge technology, thrive in a collaborative environment, and want your work to truly matter,you'vefound your home.

We deliver 24x7 AI-accelerated, human-validated detection, investigation, and response across IT and OT. This means we cut through the noise, investigate real threats, and take trusted, SLA-backed action—all powered by the brightest minds and the latest AI. Since 2012,we'vebeen helping organizations outpace evolving attacks with faster response, fewer escalations, and measurable risk reduction.

Innovationisn'tjust a buzzword here;it'sour DNA. We pioneered the first MOBILESOC app for on-the-go detection and response, infused AI into automated alert resolution toeliminatenoise, and slashed investigation time by an astounding 99.3%.We'retransforming how security teams work, and you could be a part of it. From AI-assisted triage to analyst copilots that elevate human expertise, we combine machine intelligence with human judgment to deliveroutcomesourcustomer’strust.

Ifyou'relooking for a high-trust, high-impact team where your ideas are amplified by AI and valued by colleagues and customers alike, Critical Start is the place for you. Come build the future of cybersecurity with us.

Wanttohearfromourteam? Watch these videosto gain insights into life at Critical Start or check out our Glassdoor reviews for an inside look.

We are searching for a dedicated and proficient Sr. Cybersecurity Engineer to join our Managed Security Services team. As the Senior Engineer, you will have a crucial role in designing, implementing, and improving deliverables for our Managed Services program. Your responsibilities also include monitoring and maintaining multiple SIEM environments within the scope of Critical Start's Managed Services offerings. You will collaborate with both team members and clients to onboard and support various security technologies such as Microsoft Sentinel, Sumo Logic, and Splunk, while also creating customized solutions to enhance our services.

As the Senior Engineer, your daily tasks involve configuring data sources and log forwarders, creating custom content (dashboards, workbooks, reports, alerts), conducting thorough environment reviews and gap analyses, and fulfilling advanced SIEM requests. Additionally, you serve as the subject matter expert and escalation point for both internal cross-collaboration and complex client issues. The ideal candidate possesses expert knowledge in Security Information and Event Management (SIEM) tools like Microsoft Sentinel, Splunk, and Sumo Logic, as well as expertise in Endpoint Detection and Response/Extended Detection and Response (EDR/XDR) integrations such as Sentinel One, Defender for Endpoint/Server, and Palo Alto Cortex XDR.

In your role as the Senior Engineer, you play a vital part in delivering managed services to our clients, ensuring the smooth operation of their security infrastructure.

• Maintain Expertise: Stay at the forefront of the industry by continuously updating your knowledge in SIEM tools and EDR/XDR integrations.
• Client Engagement: Deliver our managed services to clients through project-based workflows related to SIEM and EDR/XDR technologies.
• Technical Guidance: Provide technical leadership, expertise, and configuration assistance to both colleagues and clients, helping them maintain robust and effective SIEM and Endpoint security programs.
• Technical Development: Collaborate on developing technical pathways to foster growth within the organization and lead cross-functional training sessions.
• Best Practices: Create and maintain best practices and assist clients in deploying and configuring endpoint agents, security policies, log forwarders, data sources, content, and alerts.
• Security Maturation: Assist clients in maturing their SIEM and Endpoint security products in alignment with industry standards and our program offerings.
• Problem Resolution: Act as a senior technical escalation resource on the team. Troubleshoot interactions between data sources and SIEM technologies, as well as API interactions between supported security integrations and our platform (CORR).
• Automation: Identify opportunities to automate aspects of SIEM and Endpoint…