Cybersecurity Engineer (PKI And Security Operations)

TEKsystems; Euless (TX); Hybrid; USD 76,000 - 103,000; Full time

Benefits offered by this job

Medical, dental & vision

401(k) Retirement Plan

Life Insurance

Short and long-term disability

Health Spending Account (HSA)

Transportation benefits

Employee Assistance Program

Paid Time Off

Job summary

TEKsystems is seeking an experienced Cybersecurity Engineer for a hybrid role in Irving, TX, focused on PKI and security operations within an airline industry client. The position emphasizes independent contribution, threat detection, and end-to-end security engineering across enterprise and OT environments.

The role requires 5+ years of security engineering experience, hands-on Microsoft Sentinel work, and the ability to drive remediation from discovery to closure; PKI concepts are valued but

Qualifications

• 5+ years of cybersecurity or security engineering experience.
• Experience owning and delivering security projects independently.
• Strong understanding of security operations, threat detection, investigation, and incident analysis.
• Hands-on experience with Microsoft Sentinel, including: KQL query development, detection rule creation, dashboard development, security investigations.
• Experience managing vulnerability remediation and security findings through resolution.
• Ability to troubleshoot complex security issues and drive solutions with minimal oversight.
• Strong written and verbal communication skills.
• Ability to understand the broader security picture and work as a trusted engineering partner.

Responsibilities

• Design, implement, and improve cybersecurity controls and processes across enterprise environments.
• Investigate security events and perform end-to-end analysis to identify threats, vulnerabilities, and root causes.
• Build and maintain detections, dashboards, and analytics within Microsoft Sentinel.
• Develop and refine security monitoring use cases using KQL and other security engineering tools.
• Manage remediation efforts for security findings and vulnerabilities from discovery through validated closure.
• Partner with infrastructure, cloud, application, and security teams to strengthen overall security posture.
• Write, test, automate, and document security processes, scripts, and technical solutions.
• Evaluate emerging security technologies and recommend practical improvements.
• Contribute to PKI-related initiatives including certificate-based authentication, certificate lifecycle management, and related security controls when needed.
• Operate independently while supporting larger security initiatives and strategic projects.

Skills

5+ years cybersecurity engineering

Microsoft Sentinel

Detection Engineering

Security investigations

Vulnerability remediation

PKI exposure

Tools

PowerShell

Python

Job description

Cybersecurity Engineer (PKI & Security Operations)

*Location:* Irving, TX (Hybrid - 3 days onsite Tuesday-Thursday)

*Employment Type:* Long-Term Contract with Conversion Potential

*Work Authorization:* Must be legally eligible to for employment in the US. *Client *does not offer *sponsorship.*

Candidates will required to complete an online cybersecurity assessment that will take 60-90 minutes to complete.

*Top Skills*

• * 5+ years of Cybersecurity Engineering experience
• * Microsoft Sentinel, KQL, and Detection Engineering
• * Security Investigations and Threat Analysis
• * Vulnerability Remediation and Risk Reduction
• * Exposure to PKI, Certificates, or Identity-Based Security Technologies
• *Note:* Candidates do not need to be dedicated PKI engineers. The hiring team is open to strong cybersecurity engineers with some exposure to PKI concepts who can learn quickly, work independently, and contribute as a key member of the team.

*Overview *

*Our airline industry client is seeking an experienced *Cybersecurity Engineer* to join a highly visible security engineering team responsible for protecting critical enterprise and operational environments. This role is ideal for a security professional who enjoys solving complex security challenges, working independently, and contributing as a key technical resource across multiple security initiatives.

While exposure to Public Key Infrastructure (PKI) technologies is valuable, this is not a dedicated PKI engineering role. Candidates with strong cybersecurity engineering experience who understand foundational PKI concepts and can quickly learn new technologies are encouraged to apply.

*What You'll Do*

• * Design, implement, and improve cybersecurity controls and processes across enterprise environments.
• * Investigate security events and perform end-to-end analysis to identify threats, vulnerabilities, and root causes.
• * Build and maintain detections, dashboards, and analytics within Microsoft Sentinel.
• * Develop and refine security monitoring use cases using KQL and other security engineering tools.
• * Manage remediation efforts for security findings and vulnerabilities from discovery through validated closure.
• * Partner with infrastructure, cloud, application, and security teams to strengthen overall security posture.
• * Write, test, automate, and document security processes, scripts, and technical solutions.
• * Evaluate emerging security technologies and recommend practical improvements.
• * Contribute to PKI-related initiatives including certificate-based authentication, certificate lifecycle management, and related security controls when needed.
• * Operate independently while supporting larger security initiatives and strategic projects.

*Required Qualifications*

• * 5+ years of cybersecurity or security engineering experience.
• * Experience owning and delivering security projects independently.
• * Strong understanding of security operations, threat detection, investigation, and incident analysis.
• * Hands-on experience with Microsoft Sentinel, including:
  • * KQL query development
  • * Detection rule creation
  • * Dashboard development
  • * Security investigations
• * Experience managing vulnerability remediation and security findings through resolution.
• * Ability to troubleshoot complex security issues and drive solutions with minimal oversight.
• * Strong written and verbal communication skills.
• * Ability to understand the broader security picture and work as a trusted engineering partner.

*Preferred Qualifications*

• * Exposure to PKI concepts and certificate-based security technologies, such as:
  • * Certificate lifecycle management
  • * Certificate-based authentication
  • * Software/code signing
  • * SCEP, EST, or related enrollment protocols
  • * NIST identity and authentication frameworks
• * Experience with scripting and automation using Python or PowerShell.
• * Experience with security tooling APIs and integrations.
• * Familiarity with endpoint security technologies.
• * Exposure to AI-assisted security workflows, LLM-enabled security analysis, or security automation.
• * Experience supporting highly regulated, operational technology (OT), embedded systems, manufacturing, transportation, or aviation environments.
• * Experience with HSMs, key management, or code-signing platforms.

*What We're Looking For*

The hiring team is seeking a strong, well-rounded cybersecurity engineer who can work independently, think strategically, and contribute as a core member of the team. A deep PKI background is not required. Candidates who have strong security engineering experience and some exposure to PKI concepts will be considered.

*Why Consider This Opportunity?*

• * Long-term contract with potential for permanent conversion.
• * Opportunity to support a major airline's security initiatives.
• * Work on high-visibility security programs with broad organizational impact.
• * Hybrid work environment with a collaborative engineering team.
• * Exposure to cloud security, detection engineering, PKI, security operations, and emerging security technologies.

Job Type & Location

This is a Contract position based out of Euless, TX.

Pay and Benefits

The pay range for this position is $55.00 - $75.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:

• * Medical, dental & vision
• * Critical Illness, Accident, and Hospital
• * 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
• * Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• * Short and long-term disability
• * Health Spending Account (HSA)
• * Transportation benefits
• * Employee Assistance Program
• * Time Off/Leave (PTO, Vacation or Sick Leave)

*Workplace Type*

This is a hybrid position in Euless,TX.

*Application Deadline*

This position is anticipated to close on Sep 3, 2026.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance:

Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector:

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI):

We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.