For more than 40 years, Calian has been solving the world’s most complex problems by pairing the brightest minds with powerful technology. Calian solutions impact the world; from the satellites in space that connect us to the farms that feed us, from the medical professionals who care for us to the governments, schools, and companies that make the world better every day.


Position Overview

We are seeking a Lead Security Engineer to join our Cybersecurity team. This position will work closely with the SOC to mitigate incidents as well as our Principal Engineers and infrastructure team to maintain, update, and introduce new functionality to the existing environment.


  • Provide subject matter expertise on architecture, authentication and system security
  • Conduct security architecture reviews and makes recommendations
  • Lead security infrastructure projects
  • Responsible for Tier 2 Palo Alto firewall tasks including support, deployment, and management
  • Manage EDR tool
  • Handle escalations from Tier 1 and Tier 2 teams
  • Triages and handles/escalates security issues independently
  • Respond to True Positive security incidents as acting incident commander
  • Update and provide documentation of current and new processes which adhere to best practices
  • Document technical problems, resolutions, and processes for assigned tasks and projects
  • Assist with development of security training and guidance for SOC staff
  • Follow policies and procedures for change and incident management
  • Perform other duties as required and/or assigned
  • Employee must be able to perform essential functions of the job with or without reasonable accommodation


  • 10+ years of previous security experience
  • Must have experience in Incident Response as Incident Commander
  • Previous experience in a CSIRT role required
  • Must have experience triaging and investigating Alarms generated by SIEM
  • Palo Alto FW management via Panorama experience
  • Palo Alto Prisma Access admin-level knowledge
  • Ability to interact confidently with technical POC’s and clients
  • Must have a professional demeanor
  • Must be organized, able to manage and complete multiple projects simultaneously
  • Independent, with the ability to effectively work unsupervised, apply judgement and flexibility
  • Proactive, able to note tasks that need to be accomplished without being prompted
  • Previous experience working directly with technical engineers and practice managers as well as non-technical end users
  • Strong technical/troubleshooting skills
  • Demonstrable skills related to implementation of large IT architectures
  • Scripting and/or development experience is a plus
  • Must be eligible to work for any U.S. employer without the need for sponsorship now or in the future

EEO Statement 

Calian Corp. is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, sexual orientation or any other characteristic protected by law.

Job Title: Lead Security Engineer
Date: April 10, 2024
Location 1: Houston, TX
Remote: Hybrid
Business Unit: IT & Cyber Solutions
Department: Information Systems & Information Technology

Job Type: Full-time