Security Engineer

About the role

Serco is seeking a highly motivated Security Engineer III. In this role you will provide technical leadership in the design, implementation, sustainment, and continuous improvement of cybersecurity capabilities across mission systems and product lines. Working closely with government customers, program leadership, engineers, system administrators, and other stakeholders, you will help ensure cybersecurity compliance, operational effectiveness, and risk reduction in a dynamic, mission‑focused environment. This position offers the opportunity to contribute to critical national security initiatives while supporting on‑site customer operations.

Responsibilities

• Provide technical leadership in the design, implementation, sustainment, and continuous improvement of cybersecurity capabilities supporting mission systems and product lines.
• Collaborate closely with government customers, program leadership, system administrators, engineers, developers, and other internal and external teams to ensure cybersecurity compliance and operational effectiveness.
• Manage and complete tasks in a fast‑paced, results‑driven environment.

Requirements

• Bachelor’s degree in Computer Science or a related field.
• Minimum 5 years of cybersecurity experience.
• Active Secret clearance.
• Active Security+ certification.
• Demonstrated experience with Linux, Windows, enterprise networking, and cloud‑based infrastructures.
• Proven experience with the Army RMF process, NIST cybersecurity standards, DISA STIGs, POA&M, security automation, and vulnerability management tools and processes.
• Ability to perform technical risk analysis, communicate findings clearly, and develop practical remediation recommendations.

Desired qualifications

• Knowledge of Army PPB BOS financial processes.
• Experience with the software development life cycle.
• Familiarity with A&A processes, including ACAS and AESS deployments.
• Experience supporting cloud cybersecurity architectures, preferably in AWS environments.
• Knowledge of stakeholder collaboration with Army stakeholders, AO, Security Control Assessors, etc.
• Experience with version control software (e.g., Git) and ticket‑tracking systems (e.g., JIRA).

Company overview

Serco Inc. (Serco) is the Americas division of Serco Group, plc. In North America, Serco’s 9,000+ employees strive to make an impact every day across 100+ sites in the areas of Defense, Citizen Services, and Transportation. We help our clients deliver vital services more efficiently while increasing the satisfaction of their end customers. Serco serves every branch of the U.S. military, numerous U.S. Federal civilian agencies, the Intelligence Community, the Canadian government, state, provincial and local governments, and commercial clients. Wherever you work and whatever you do, we invite you to discover your place in our world.

Benefits

• Medical, dental, and vision insurance
• Robust vacation and sick leave benefits, and flexible work arrangements where permitted by role or contract
• 401(k) plan with employer matching funds
• Tuition reimbursement program
• Life insurance and disability coverage
• Optional coverages (pet, home, auto, additional life and accident, critical illness, group legal, ID theft protection)
• Birth, adoption, and parental leave benefits
• Employee Assistance Plan

Pay

Serco’s Total Rewards package includes competitive pay, performance‑based incentives, and benefits that promote well‑being and work‑life balance. The salary range for this position is provided at the top of the posting and serves as a general guideline across experience levels; actual base salary will be determined by factors such as scope of the role, relevant experience, education, key skills, and geographic market considerations. Eligible positions may also include annual bonuses or long‑term incentive opportunities.