Share this Job

Network Security Engineer - Atlanta, GA

Location:  Atlanta, GA, US, 30338
Company:  Oldcastle Materials Inc



Job ID:  116087


Oldcastle Materials, Inc., a division of Oldcastle, is the leading vertically integrated supplier of aggregates, asphalt, ready mixed concrete, and construction and paving services in the United States.  Our operations span the nation from Montana to Texas and from Washington to Florida, with 18,000 employees at more than 1,200 locations in 44 states.


Position Overview

Reporting to the VP, Infrastructure & Operations of the Oldcastle Materials Group (‘OMG’), the Network Security Engineer is responsible for design, execution and oversight of network security for OMG as well as providing network security expertise for security teams across four product groups partnered with OMG. It is the job of the Network Security Engineer to monitor and manage corporate security devices and applications, including Firewalls, IPS/IDS Systems, Patch management Systems, Certificate Authority, Proxy Servers, Email Filters, and Web Content Filters. The Network Security Engineer will be responsible for diagnosing security-related network operations problems. The Network Security Engineer will work closely with the IT leadership and decision makers in other departments in order to identify, recommend, develop, implement, and support cost-effective IT Security technology solutions for all aspects of the organization. The Network Security Engineer will work collaboratively with information security professionals across other divisions of CRH (OMG’s parent company).

Key Responsibilities (Essential Duties And Functions)


  • Configure, support and maintain day-to-day operations of security tools.
  • Monitor security consoles and remediate alerts as appropriate.
  • Respond to and remediate security incidents, intrusions, malware infections, etc.
  • Review network designs and evaluate compliance to applicable security standards.
  • Conduct network security audits and provide recommendations to mitigate risks.
  • Take action to maintain compliance to security standards and policy, escalate non-compliance in a timely and effective manner.
  • Effectively carry out design, configuration and documentation of information security systems and devices (e.g. Firewalls, VPNs, Enterprise Gateway Devices, Remote Access Solutions, SIEMs, Content Engines, IPS/IDS Systems)
  • Maintain current configurations, carry out proper administration and support of information security systems (e.g. Firewalls, VPNs, Enterprise Gateway Devices, Remote Access Solutions, Content Engines, IPS/IDS Systems)
  • Maintain current and relevant knowledge of common network, authentication and security protocols (e.g. SNMP, TLS, SSL DNS, HTTPS, SMTP, LDAP, KERBEROS, RADIUS and FTPS)
  • Maintain current and relevant knowledge of existing, changing and rising threats in business, network and security landscapes.
  • Participate in change management process meetings and working sessions.
  • Define and enforce controlled access to corporate security zones as required.
  • Participate as an effective contributor in CRH global and Oldcastle Inc, regional security working groups, conferences, programs of work and projects as required.
  • Create and maintain network security related policies, procedures, standards, and documentation as needed.
  • Evaluate project initiation documents from the perspective of information security standards and practices.
  • Produce and maintain disaster recovery and business continuity work practices related to information security policies, procedures, processes and tools.





  • Bachelor’s degree in Computer-related discipline; or equivalent professional experience, with 5+ years of experience in designing and implementing enterprise wide technical solutions for network and information security in large distributed enterprise environments.
  • CCNA, CCNA Security, SSCP, CISSP or similar GIAC certifications desired.
  • Expert knowledge of networking required.
  • Experience with log management and analysis tools.
  • Experience with forensics tools such as wireshark, nessus, netsleuth, Networkminer.
  • Demonstrated understanding of VPNs and remote access.
  • Experience with web application vulnerability scanning tools.
  • In depth knowledge of OSI and TCP/IP models, SNMP, DNS, DHCP, Netflow
  • Experience with Cisco CES, CWS, and AMP a plus.
  • Understanding of information management and data classification.
  • Security incident investigation experience.
  • Virus protection and content filtering knowledge.
  • Knowledge of encryption techniques and PKI infrastructure.
  • Security policy knowledge and experience.


Work Requirements


  • Ability to travel up to 20% as required by the business.


Knowledge/Skill Requirements


  • Strong understanding of IT Security Management principles and practices.
  • Demonstrated ability to exercise judgement and decision making.
  • Specific Technical knowledge.
  • Strong oral & written communication, listening and presentation skills
  • Demonstrated critical thinking, situational analysis and problem-solving skills and mindset.
  • Strong technical documentation skills.
  • Good interpersonal skills.
  • Ability to conduct research into security issues, standards, and products as required.
  • Ability to present ideas in user-friendly language.
  • Highly self-motivated and directed.
  • Keen attention to detail.
  • Proven analytical and problem-solving abilities.
  • Ability to effectively prioritize and execute tasks in a high-pressure environment.
  • Strong customer service orientation.
  • Experience working in a team-oriented, collaborative environment.


Physical Requirements

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.


  • Able to communicate with others by telephone and in person.
  • Able to utilize a computer for word processing, email communication, and preparation of documents and presentations.


Work Environment

Usually, normal office working conditions. The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. 


  • The noise level in the work environment is usually quiet.
  • The position will require work outside of normal business hours.


The statements included in this job description are not intended to be all-inclusive. They represent typical elements and criteria necessary to successfully perform the job. Other duties may be assigned as required. Requirements for this job are subject to modification by the Company and its designees, and reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.


What Oldcastle Offers You


  • A culture that values opportunity for growth, development and internal promotion
  • Highly competitive base pay
  • Comprehensive medical, dental and disability benefits programs
  • Group retirement savings program
  • Health and wellness programs


About Oldcastle


Oldcastle has a long and proud heritage as one of North America’s largest corporations. We are a proud reflection of the hundreds of family businesses, local and regional companies and mid to large sized enterprises that together form the Oldcastle family. Oldcastle operates with a decentralized, diversified structure, letting you work in a small company environment while having the career opportunities of a large enterprise.


Oldcastle is a great place to grow! If you’re up for a rewarding challenge, we invite you to take the first step and apply today! Please complete your online application and profile which will be sent directly to the appropriate Hiring Manager. Thank you for your interest in the Oldcastle family!


Follow Oldcastle Careers on FacebookTwitterInstagramGoogle+PinterestWordPress (Career Blog) and LinkedIn!


 EOE/Vet/Disability--If you want to know more, please click on this link

Oldcastle Materials is an Affirmative Action and Equal Opportunity Employer.

Oldcastle Materials is part of the Oldcastlecareers™ network.



Nearest Major Market: Atlanta

Job Segment: Network, Construction, Cisco, Network Engineer, Engineer, Technology, Engineering