Senior InfoSec Engineer: Cloud, IAM & PKI Architecture

Default Brand; Herndon (VA); On-site; USD 140,000 - 190,000; Full time

Job summary

Exostar is seeking a senior security architect to design and implement security controls across cloud, identity, and PKI environments in our Herndon, VA office. You will partner with DevOps, application, and operations teams to translate requirements into concrete designs and measurable controls.

You will assess architecture, conduct threat modeling, and drive remediation with auditors and leadership. This role emphasizes engineering credibility, architectural judgment, and collaboration across

Qualifications

• 10+ years of hands-on experience evaluating secure architecture.
• Experience with cloud, identity, and PKI, and security controls.
• Experience supporting audits (SOC 2, ISO 27001).
• Strong written and verbal communication.

Responsibilities

• Assess, design, and provide guidance on secure cloud architecture.
• Translate security requirements into implementable designs.
• Review system changes and control implementations for security implications.
• Provide hands-on engineering support for control effectiveness.
• Perform threat modeling and risk assessments.
• Coordinate actionable mitigation strategies.

Skills

Security architecture

Threat modeling

CI/CD integration

DevSecOps

Identity management

Network security

Auditor communication

Education

Bachelor’s degree in IT-related discipline

Tools

Jira

Confluence

Job description

Exostar is seeking a senior security architect to design and implement security controls across cloud, identity, and PKI environments in our Herndon, VA office. You will partner with DevOps, application, and operations teams to translate requirements into concrete designs and measurable controls.

You will assess architecture, conduct threat modeling, and drive remediation with auditors and leadership. This role emphasizes engineering credibility, architectural judgment, and collaboration across