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Callie Gresham
Cyber Security Professional
Kansas City, MO, United States
Details
Education:
Master's degree
Cyber Security
Maryville University of Saint Louis
2018 : 2020
Cisco Certified Support Technician (CCST) Cybersecurity in Progress
Cybersecurity
Cisco Networking Academy
2023 :
Bachelor's degree
Business Administration, Business Management
Missouri Western State University
1994 : 1998
Cyber Security
Maryville University of Saint Louis
2018 : 2020
Cisco Certified Support Technician (CCST) Cybersecurity in Progress
Cybersecurity
Cisco Networking Academy
2023 :
Bachelor's degree
Business Administration, Business Management
Missouri Western State University
1994 : 1998
Experience:
2023 : Present
T-Mobile
Analyst, Cybersecurity Policy and Compliance - Government
As a cybersecurity consultant, I excelled in providing comprehensive cyber security solutions to clients within the banking industry.
• Security assessments and recommendations : thorough examination of client's processes and policies to identify vulnerabilities and potential risks to its security posture. Based on the findings, I provided recommendations and strategies to strengthen their security controls and mitigate potential risks.
• Penetration testing : Led penetration testing initiatives using Burp Suite and Nessus to simulate real-world cyber attacks to identify vulnerabilities in clients' networks, web applications, and systems.
• Social Engineering : Conducted pre-text calling exercises and phishing simulations to test the clients’ resilience against social engineering attacks. Results were sent to the clients so they could assess their susceptibility to phishing attacks and educate their employees about phishing threats.
• Industry standard compliance : Maintained up-to-date knowledge of industry standards and regulations such as NIST, ISO, and OWASP. Leveraged this expertise to guide clients in achieving and maintaining compliance, ensuring their security practices align with industry best practices and legal requirements.
Serving as the Administrative Operating Company Number (AOCN) Subject Matter Expert (SME) I successfully provided valuable support and achieved significant results for our telecom clients.
• Completed national database updates for ILEC, CLEC, and Wireless clients. BIRRDS for billing and routing, LERG for routing and interconnection information, and NECA for cost and revenue reporting.
• Utilized North American Numbering Plan Administration (NANPA) portals to accurately forecast, order, activate, and file reports on numbering resources.
• Assisted AOCN clients with the porting of both inbound and outbound customer phone numbers using the Number Portability Administration Center (NPAC) system.
2016 : 2023
Moss Adams LLP
Consulting Manager
During my tenure as a Realtor, I had the privilege of guiding clients through the complex home buying and selling process. With effective communication and coordination skills, I seamlessly liaised with clients, other real estate agents, lenders, appraisers, inspectors, and title companies, ensuring a smooth and successful transaction. I also stayed up-to-date with continuing education requirements to provide clients with the most current and reliable information.
2014 : 2017
Keller Williams Realty, Inc.
Licensed Realtor
Network Planner II – Switched Access Planning, November 2012 – November 2014
This position entailed overseeing the migration from CDMA to Network Vision switches, optimizing connections in multiple switches, and managing complex traffic flows across wireline and wireless networks for quality service. Responsibilities also involve collecting and analyzing trunk data and performing capacity studies.
Telecom Design Engineer II – Network Design & Engineering, June 2011 – November 2012
Supported the preparation for the Network Vision launch, conducting lab and field tests for eHRPD and LTE with Ericsson, ALU, and Samsung equipment. Utilized Network Elements like PGW, HSGW, AAA, HSS, PCRF, MME, RNC, and SPS. SME on Lab and Production handset activations, upgrades, and repair.
Network Engineer II – National Platform, December 2010 – May 2011
Managed SDHLR migrations for load balancing, coordinated with NOC for DF migration schedule, maintained subscriber data through NASTI reports, monitored DN and MIN Responses on CF equipment, and tracked eSM Provisioning records with weekly reporting.
Access Planner II – Traffic, March 2004 – September 2010
Managed the DMS-250 Offload to NGVN project, Designed and Maintained traffic flows throughout the Wireline and Wireless networks, launched new wireless switches, performed capacity studies and sizing of trunk groups to optimally maintain connectivity preventing service outages and interruptions.
Network Translations Specialist III, July 2001 – March 2004
Performed activities in switches related to NPA-NXX routing, mobile codes, trunk groups, and Abbreviated Dialing Codes. Performed monthly routing audits and implemented new features in multiple switches. Analyzed and corrected issues with approx. 30 customer trouble reports per day.
Manager – Provisioning, August 2000 – July 2001
Associate Engineer / Network Analyst – Provisioning, December 1999 – August 2000
Administrative Assistant to Director, December 1998 – December 1999
1998 : 2014
Sprint
Telecommunications Network Operations Design and Planning
T-Mobile
Analyst, Cybersecurity Policy and Compliance - Government
As a cybersecurity consultant, I excelled in providing comprehensive cyber security solutions to clients within the banking industry.
• Security assessments and recommendations : thorough examination of client's processes and policies to identify vulnerabilities and potential risks to its security posture. Based on the findings, I provided recommendations and strategies to strengthen their security controls and mitigate potential risks.
• Penetration testing : Led penetration testing initiatives using Burp Suite and Nessus to simulate real-world cyber attacks to identify vulnerabilities in clients' networks, web applications, and systems.
• Social Engineering : Conducted pre-text calling exercises and phishing simulations to test the clients’ resilience against social engineering attacks. Results were sent to the clients so they could assess their susceptibility to phishing attacks and educate their employees about phishing threats.
• Industry standard compliance : Maintained up-to-date knowledge of industry standards and regulations such as NIST, ISO, and OWASP. Leveraged this expertise to guide clients in achieving and maintaining compliance, ensuring their security practices align with industry best practices and legal requirements.
Serving as the Administrative Operating Company Number (AOCN) Subject Matter Expert (SME) I successfully provided valuable support and achieved significant results for our telecom clients.
• Completed national database updates for ILEC, CLEC, and Wireless clients. BIRRDS for billing and routing, LERG for routing and interconnection information, and NECA for cost and revenue reporting.
• Utilized North American Numbering Plan Administration (NANPA) portals to accurately forecast, order, activate, and file reports on numbering resources.
• Assisted AOCN clients with the porting of both inbound and outbound customer phone numbers using the Number Portability Administration Center (NPAC) system.
2016 : 2023
Moss Adams LLP
Consulting Manager
During my tenure as a Realtor, I had the privilege of guiding clients through the complex home buying and selling process. With effective communication and coordination skills, I seamlessly liaised with clients, other real estate agents, lenders, appraisers, inspectors, and title companies, ensuring a smooth and successful transaction. I also stayed up-to-date with continuing education requirements to provide clients with the most current and reliable information.
2014 : 2017
Keller Williams Realty, Inc.
Licensed Realtor
Network Planner II – Switched Access Planning, November 2012 – November 2014
This position entailed overseeing the migration from CDMA to Network Vision switches, optimizing connections in multiple switches, and managing complex traffic flows across wireline and wireless networks for quality service. Responsibilities also involve collecting and analyzing trunk data and performing capacity studies.
Telecom Design Engineer II – Network Design & Engineering, June 2011 – November 2012
Supported the preparation for the Network Vision launch, conducting lab and field tests for eHRPD and LTE with Ericsson, ALU, and Samsung equipment. Utilized Network Elements like PGW, HSGW, AAA, HSS, PCRF, MME, RNC, and SPS. SME on Lab and Production handset activations, upgrades, and repair.
Network Engineer II – National Platform, December 2010 – May 2011
Managed SDHLR migrations for load balancing, coordinated with NOC for DF migration schedule, maintained subscriber data through NASTI reports, monitored DN and MIN Responses on CF equipment, and tracked eSM Provisioning records with weekly reporting.
Access Planner II – Traffic, March 2004 – September 2010
Managed the DMS-250 Offload to NGVN project, Designed and Maintained traffic flows throughout the Wireline and Wireless networks, launched new wireless switches, performed capacity studies and sizing of trunk groups to optimally maintain connectivity preventing service outages and interruptions.
Network Translations Specialist III, July 2001 – March 2004
Performed activities in switches related to NPA-NXX routing, mobile codes, trunk groups, and Abbreviated Dialing Codes. Performed monthly routing audits and implemented new features in multiple switches. Analyzed and corrected issues with approx. 30 customer trouble reports per day.
Manager – Provisioning, August 2000 – July 2001
Associate Engineer / Network Analyst – Provisioning, December 1999 – August 2000
Administrative Assistant to Director, December 1998 – December 1999
1998 : 2014
Sprint
Telecommunications Network Operations Design and Planning
Company:
T-Mobile
Years of Experience:
25
Skills
3G, 4G, Access, CDMA, Communication, Cybersecurity, Database Administration, Databases, Information Security, Information Technology, LTE, Management, Microsoft Excel, Mobile Devices, Network Design, Networking, Organization Skills, Program Management, Project Management, Project Planning, Provisioning, Residential Real Estate, Routing, Sales, Switches, T1, Telecommunications, Testing, Time Management, VoIP, Wireless, Wireless Communications Systems, Wireless Networking
About
Cybersecurity professional with a strong background in identifying and mitigating cyber threats to ensure the integrity, confidentiality, and availability of sensitive information. Experience in performing comprehensive security assessments, vulnerability assessments, and penetration testing to fortify organizational defenses. Self-motivated, fast learner, extremely organized, ability to multi-task, team player, excellent interpersonal skills
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