AppSec Engineer: Secure SDLC & Tooling Enablement

Transaction Network Services; Springfield (IL); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Medical coverage

Dental coverage

Paid holidays

401K with company match

Job summary

Transaction Network Services in Springfield, IL is seeking an Application Security Engineer to advance secure software development across the SDLC. You will partner with development, DevOps, infrastructure, and security teams to identify, assess, and remediate risks while enabling secure delivery of business applications.

You will lead SAST/SCA, ASPM, CI/CD security, container security scanning, and vulnerability management, supporting threat modeling, architecture reviews, and secure design

Qualifications

• Bachelor’s degree in Cybersecurity, CS, IT, or related field.
• 5+ years in Application Security or secure development.
• Experience with SAST, SCA, DAST, ASPM, container security, and CI/CD security controls.
• Hands-on with GitLab, GitHub, Azure DevOps, or similar platforms.
• Compensation ranges are market-estimated; TNS offers a comprehensive benefits package.

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 findings and improve secure coding.
• Support threat modeling, architecture reviews, and secure design consultations.
• Prioritize and manage remediation for critical and high-risk vulnerabilities.
• Provide application security guidance across multiple business units.

Skills

SAST

SCA

DAST

ASPM

Container security

CI/CD security

Education

Bachelor's degree in Cybersecurity, CS, IT, or related field

Tools

GitLab

GitHub

Azure DevOps

Job description

Transaction Network Services in Springfield, IL is seeking an Application Security Engineer to advance secure software development across the SDLC. You will partner with development, DevOps, infrastructure, and security teams to identify, assess, and remediate risks while enabling secure delivery of business applications.

You will lead SAST/SCA, ASPM, CI/CD security, container security scanning, and vulnerability management, supporting threat modeling, architecture reviews, and secure design