Network Security Specialist

ASSYST • Tallahassee, FL

24d • Onsite

About The Position

ASSYST is seeking a skilled Network Security Specialist to support our client in Tallahassee,FL Location: Tallahassee, FL Job Type: Contract (Corp to Corp/C2C or 1099) Position: Onsite, No Remote Work Allowed. Job Title: Network Security Specialist (Payment Fraud & Digital Forensics) We are seeking an experienced Network Security Specialist with deep expertise in payment fraud detection, digital forensics, and security monitoring to protect our payment ecosystem and investigate complex financial crimes. This role will lead advanced fraud investigations, design proactive monitoring and alerting capabilities, and collaborate with cross-functional and external stakeholders to ensure rapid detection, response, and compliance.

Requirements

• 8–10 years of progressive experience in cybersecurity, with a strong focus on payment fraud detection, investigation, and digital forensics.
• Demonstrated expertise in security best practices , risk analysis methodologies, and their real-world application.
• Working knowledge of industry frameworks and controls, including ISO, CIS, NIST CSF, and SCF .
• Proven hands-on experience with digital forensic tools such as EnCase, FTK, or equivalent platforms.
• Strong analytical capabilities with experience using data analysis and scripting tools (e.g., SQL, Python, or similar) to investigate complex financial fraud scenarios.
• Excellent written and verbal communication skills, with the ability to produce clear, defensible investigation reports and present findings to both technical and non-technical audiences, including executive leadership.
• Bachelor’s or Master’s degree in Cybersecurity, Computer Science, or a related discipline.

Nice To Haves

• Certified Fraud Examiner ( CFE )
• Certified Payments Professional ( CPP )
• Certified Anti-Money Laundering Specialist ( CAMS )

Responsibilities

• Lead and conduct end-to-end investigations into suspected payment card fraud and other financial crimes, from initial detection through final resolution.
• Apply advanced digital forensic techniques to acquire, preserve, and analyze digital evidence from multiple sources to support investigations and root-cause analysis.
• Monitor and analyze transaction data, user behavior, and security alerts from SIEM and fraud detection platforms to identify suspicious activity and indicators of compromise.
• Design and implement monitoring mechanisms to detect, at a minimum: Unusual spikes in failed payment transaction attempts High volumes of low-value transactions from the same IP address or device targeting single credit cards Multiple rapid transactions using different credit cards originating from the same IP, device fingerprint, or session ID
• Perform log and SIEM analysis on web and payment logs to detect: Burst transaction patterns Consistent failed authorization attempts Repeated or abnormal use of credit card data
• Configure and maintain alerting thresholds for anomalies, including: Transaction volume per minute and per hour Authorization failure-rate thresholds
• Collaborate with internal teams (Legal, Compliance, Risk, and IT) and external partners, including law enforcement , to manage investigation cases and deliver detailed findings or expert testimony when required.
• Conduct forensic readiness assessments and contribute to the development and enhancement of the organization’s incident response and breach management plans.
• Mentor and guide junior analysts while staying current with emerging fraud tactics, cyber threats, and evolving security technologies.

What This Job Offers

• Career Level: Mid Level