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Engineer Network

Chicago, IL
October 17, 2019

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Mark Ozga has over * years of experience engineering high-touch Cisco systems and supporting numerous network devices that have been vital to the safety of people’s lives. Early on, Mark started his career as an independent consultant for Red River, a government contractor awarded a multi-million-dollar contract installing Cisco network equipment in more than a dozen Veteran’s Administration Health Care facilities. Afterward, Mark became chief network administrator for a medical facility that housed a 3.0 Tesla magnetic resonance imaging modality that generated hundreds of gigabits of data per second. Mark was able to bring faulty equipment online so that patients with injuries could be processed for treatment.

Mark later worked for a $937 million e-commerce company that required demanding uptimes, and where any systems failures could be measured in hundreds of thousands of dollars per hour.

Mark’s Cisco Certified Network Professional (CCNP) certification speaks for his dedication to the comprehension of the Cisco Operating System, which consists of the cumulative works of more than 3,000 world-class Cisco software engineers and took more than 600 person-years to develop. Furthermore, Mark has developed tools that use empirical methods to chart network designs and network performance in real-time on a day-to-day basis in an effort to alert him to problems before they become critical and to gather network performance data over time for management to review.


Lead Network Engineer. Parsons Corporation, Schaumburg IL. 2017-2019

Mark’s experience at Parsons includes working with Illinois Tollway civil engineers to meet design objectives for artisanal-handcrafted intelligent transportation systems that need to overcome a wide range of constraints. Mark has the expertise to ensure that no matter how complicated a network design is, he has the experience to leverage his deep understanding of Cisco technologies to ensure a network’s high availability and align it with the IETF standards body for networking best practices.

Provide real-time status of all network devices.

Coordinate with contractors/vendors

Configure various network devices for field deployment.

Provide initial trouble ticket triage at the CA office

Provide trouble ticket field investigation and remediation

Install and commission field networking hardware.

Attend various internal and external stakeholder meetings

Review designs, specifications and test plans

Coordination with Tollway’s IT department to replace aging infrastructure to a more modern Cisco Nexus platform.

Lead the eSentire remediation plan on behalf of Parsons.

Worked to design the disaster recovery network readiness plan.


Total: 9+

With Parsons: 2+


Bachelors of Science in Information Assurance &

Security Engineering

DePaul University

School of Computing

Class of Spring 2012


Cisco CCNP (Networking)

Microsoft MCSE (Software)

VMware VCP x 2 (Hardware)

ISC2 CISSP (Security)



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Senior Infrastructure Engineer. American Hotel Register, Vernon Hills, IL, 2016-2017.

As a member of the network services team, Mark was responsible for maintaining over 1,600 IP nodes, 500 of which were virtual machines. He heavily leveraged System Center 2012 and Solar Winds to monitor nodes on the network and strive for the highest availability uptimes possible. Mark performed security updates on Cisco UCS clustered servers to maintain a highly secure VMware environment that housed all the web applications, logistics servers, and databases the company uses for e-commerce. 55 percent of the company’s income is from online sales. Mark’s responsibilities included the following:

Migrated 900 mailboxes from on-premise Exchange 2010 to Office 365 Exchange Online

Deployed an on-premise Skype for Business server with SSL certificate and SIP carrier integration

Deployed Microsoft Direct Access always-on IPv6 VPN for outside sales remote workers

Deployed a Checkpoint appliance with SSL-encrypted content scanning by decryption and re-encryption

Deployed SAP HANA server for SAP go-live scheduled for 2018

Deployed F5 BIG-IP LTM local traffic manager high availability pair with secure cookie persistence

Worked to convert the current flat network to more secure network with VLANs segmentation by 2018

Deployed Multifactor Authentication Server for Azure Active Directory

Programmed extensively in PowerShell for Office 365

Programmed extensively in VBScript for server automation

Programmed extensively in VBA for data mining

Programmed in SQL for data extraction into VBA

Programmed in Visual Studio .NET, C#

Extensive white-box web-site penetration testing of ASP.NET

Deployed AppDynamics into Production environment with zero-downtime

Implemented and troubleshooted SAML integrations with X-Matters, Cornerstone, Grovo, and Office 365.

Optimized Cisco Nexus 9K and 7K series STP topology to interoperate with Cisco Catalyst 6500.

Worked on a team to remediate vulnerabilities found by the Department of Homeland Security.

PACS Administrator. 3T Imaging, Morton Grove, IL, 2015-2016.

Mark was responsible for managing images from Cat scan, Magnetic Resonance Imaging, Ultrasound, and Dexa bone scan machines. He built VPN connections for remote radiologists so that radiologists could read the images and dictate a report using Nuance PowerScribe 360. Mark managed the virtual machines that made these activities possible across various platforms such as Citrix XenServer, Microsoft Hyper-V, and VMware vSphere. His responsibilities included the following:

Managed a Citrix XenApp farm for RIS services for medical billing and coding department

Managed a Windows 2008 active directory user and computer environment, along with GPOs and OUs

Provided remote support, training, and remote VPN provisioning using Dell SonicWall SOHO devices

Moved equipment from on-premise to secure datacenter called Digital Reality in Franklin Park, IL

Worked to battle DDoS attacks using proxy servers and various packet scrubbing technologies.

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