540 is seeking a Cybersecurity Engineer to support our partnership with Google and the Department of War in advancing mission-critical capabilities for a global data processing platform. This platform leverages Machine Learning, modern cloud and containerized technologies to ingest, process, and analyze high-volume, time-series data. In this role, you will support the implementation and maintenance of cybersecurity controls across a complex cloud and platform environment. You will work closely with engineers, architects, and security stakeholders to ensure systems are secure, compliant, and resilient within highly regulated, high-impact environments. Location: Patrick SFB, FL or Arlington, VA. Candidates should be local to either location. Onsite support may be required based on mission and customer needs. Travel up to 25% Citizenship & Clearance Requirement: Per client requirements, candidates must be U.S. Citizens with an active DoW clearance with TS/SCI eligibility Education Requirement: Bachelor’s Degree in Computer Science, Cybersecurity, or related field (preferred) 540 Internal Thrive Level: Security Specialist III WHY 540? 540 is a forward-thinking company that the government turns to in order to #getshitdone. We don’t just talk about innovation – we deliver it. We break down barriers, build impactful technology, and solve mission-critical problems. HOW YOU’LL DRIVE IMPACT * Support implementation of security controls across cloud infrastructure, platforms, and applications * Assist in maintaining compliance with DoD security requirements and frameworks (RMF, NIST 800-53) * Collaborate with engineers and architects to integrate security into system design and development * Support vulnerability management, scanning, and remediation efforts * Assist in monitoring system security posture and responding to security findings * Help implement identity, access management, and least privilege principles * Support development and maintenance of security documentation, including SSPs and POA&Ms * Participate in security assessments, audits, and authorization activities * Support incident response activities and root cause analysis * Collaborate with cross-functional teams to promote secure development and operational practices REQUIRED SKILLS & EXPERIENCE * 5+ years of experience in cybersecurity, information assurance, or related roles * Experience working with cloud environments (AWS, Azure, or Google Cloud) * Experience completing the RMF process from start to finish, including required documentation  * Experience creating and managing ATO packages in eMASS   * Familiarity with DoD security frameworks  and NIST 800-53 Rev. 5  * Experience supporting vulnerability management and security assessments (including DISA STIG testing) * Understanding of identity and access management concepts * Familiarity with securing containerized environments and cloud-native applications * Experience with security tools such as vulnerability scanners or SIEM platforms * Experience implementing and analysing SAST for backend or full-stack applications * Strong problem-solving and analytical skills * Ability to communicate effectively with technical and non-technical stakeholders * Ability to work independently while contributing to a team environment * CompTIA Security+ certification required (or ability to obtain within 30 days of hire) NICE TO HAVE * Experience supporting Google Cloud environments (GCP) * Familiarity with cloud security concepts * Experience working with Linux-based systems * Experience with DevSecOps practices and CI/CD security integration * Experience supporting U.S. Federal Government programs, particularly DoW environments * Experience supporting cybersecurity efforts within high-security or highly-regulated environments BENEFITS & PERKS * Flexible PTO + all Federal holidays off * Health, dental and vision insurance plans * Flexible Spending Account (FSA) * 401k with employer match * Company-sponsored life insurance, short- and long-term disability  * Professional development (training, certifications, conferences) * Paid cloud developer accounts * Referral bonuses * HQ office perks (parking / metro reimbursement, nitro coffee & lunches)  * Annual social events (540 Week, hackathon, charity golf tournament, etc.) * Access to 540’s Washington Capitals & Nationals tickets EQUAL EMPLOYMENT OPPORTUNITY (EEO) 540's policy is to provide equal employment opportunity to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.