Application Security Engineer I — SDLC & SAST Focus

Transaction Network Services (TNS); California (MO); On-site; USD 75,000 - 83,000; Full time

Benefits offered by this job

Medical & Dental

Life Insurance

Paid Holidays

401K with company match

Job summary

Transaction Network Services (TNS) seeks a Senior Application Security Engineer to advance our secure software development program by integrating security throughout the SDLC. You will partner with application development, DevOps, infrastructure, and security teams to identify, assess, and remediate application security risks while enabling secure delivery of business applications.

You will lead SAST, SCA, ASPM, CI/CD security integrations, container security scanning, and vulnerability

Qualifications

• Bachelor's degree in Cybersecurity, CS, IT, or related field.
• 5+ years of Application Security or Secure Development experience.
• Experience with SAST, SCA, DAST, ASPM, container security, and CI/CD controls.
• Hands-on with GitLab, GitHub, Azure DevOps, or similar platforms.
• Knowledge of OWASP Top 10, threat modeling, secure SDLC, and vulnerability management.
• Certifications such as CISSP, CSSLP, GSEC, GWAPT, GIAC preferred.

Responsibilities

• Lead application security assessments and vulnerability management activities.
• Implement and manage SAST, SCA, container, and CI/CD security controls.
• Drive ASPM platform adoption and security tool integrations.
• Partner with development teams to remediate security findings and improve secure coding practices.
• Develop and maintain AppSec automation, workflows, and runbooks.
• Support threat modeling, architecture reviews, and secure design consultations.
• Prioritize and manage remediation efforts for critical and high-risk vulnerabilities.
• Provide application security guidance across multiple business units and technology teams.

Skills

5+ years of Application Security

Threat modeling

Secure SDLC

Communication

Stakeholder management

Education

Bachelor's degree in Cybersecurity/CS/IT

Tools

GitLab

GitHub

Azure DevOps

Job description

Transaction Network Services (TNS) seeks a Senior Application Security Engineer to advance our secure software development program by integrating security throughout the SDLC. You will partner with application development, DevOps, infrastructure, and security teams to identify, assess, and remediate application security risks while enabling secure delivery of business applications.

You will lead SAST, SCA, ASPM, CI/CD security integrations, container security scanning, and vulnerability