I will be your enterprise technical cyber security consultant
INFORMATION SECURITY CONSULTANT
Vetted by Fiverr Pro
Denis Galkin was selected by the Fiverr Pro team for their expertise.
Vetted for
Business Consulting
Cybersecurity
What people loved about this freelancer
mattdmcc

United States
Denis was great at adjusting our focus during a meeting, and shared valuable insights, while enabling me to get working on things myself.
modi_systems82

United States
A Distinguished Expert in his field, will be working with in the near future. Understood the scope of work and went above the initial ask and delivered in a timely manner and above my expectations
marc_prenty

New Zealand
Really good experience working with Denis. He was knowledgeable, easy to deal with, and explained things in a clear, practical way. The consultation was very...
About this Gig
Vetted Pro
ππππ ππΌππππ $700 πππ πΌ πΎπππππππΌππππ πππ ππππ ππ πΌ ππππΏ ππππΎπ?
When you are certain that the impact for your business will cost more than $1000.
ππππΎππΌπ πππππ!
Order the PREMIUM service package - receive a free DMARC, DKIM, SPF report.
Expertise:
Audit
β’
Gap Analysis
β’
Risk Assesment
Clients Iβve worked with
Barclays UK
Professional Services
I assessed cybersecurity and regulatory risks of Barclays online banking and consulted how to secure it.
Aug 2010-Sep 2012
Pearson
Education Organization
I scanned and prioritized vulnerabilities of all global datacenters of Pearson.
Jun 2013-Nov 2013
My Portfolio
Other Cybersecurity Services I Offer
FAQ
Can you help design or review a Zero Trust Architecture?
Yes. I provide consultation on Zero Trust implementation across hybrid environmentsβreviewing identity, access, segmentation, trust boundaries, and endpoint posture enforcement for Microsoft 365, Azure, AWS, and SaaS apps.
Do you consult on cloud security posture for Azure, AWS, or M365 tenants?
Absolutely. I can assess your current cloud configuration (e.g., IAM, key management, encryption at rest/in transit, logging), review against CIS Benchmarks or ISO 27017, and provide hardening guidance.
Can I consult with you on secure SDLC or DevSecOps design?
I support CI/CD pipeline security, GitHub/GitLab integration, infrastructure as code (IaC) risk controls (Terraform, AWS CloudFormation), and OWASP ASVS/Top 10 integration into automated workflows.
Do you support SCADA or OT security assessments?
Yes. I have experience with ICS/SCADA environments and can help you design secure network segmentation, harden legacy systems, assess physical access controls, and build OT-specific incident response plans.
What compliance frameworks do you cover at the technical control level?
I consult across ISO/IEC 27001:2022, NIST CSF 2.0, SP 800-53, HIPAA Security Rule, PCI DSS v4, GDPR (Article 32), NIS2, DORA, and CIS Controls β including deep technical mapping and implementation of Annex A or equivalent safeguards.
Do you offer technical consultation on firewalls, WAF, and IPS/IDS?
Yes. I review configurations, analyze rulebases, optimize zones/policies, and provide best practices for Fortinet, Palo Alto, Cisco ASA/Firepower, Cloudflare WAF, and AWS Shield.
Can you support DMARC/DKIM/SPF configuration and reporting?
Yes. I can configure and verify proper DNS records, troubleshoot SPF alignment, implement DMARC with reporting, and reduce spoofing risks β especially relevant for Microsoft 365, Google Workspace, and SMTP servers.
Will I receive a technical summary or configuration checklist?
Upon request, yes. I provide structured outputs: CLI-level configs, diagrams, cloud policy snapshots, IAM access reviews, or technical remediation plansβdepending on the subject of consultation.
Do you support SaaS platform security reviews?
Yes. I review the security configuration and governance of SaaS platforms (e.g., Salesforce, HubSpot, Jira, Notion, Dropbox), with focus on roles, access, SSO integration, encryption, and vendor risk.
Is source code review or vulnerability assessment part of this service?
I can advise on secure coding practices, architecture flaws, or integration risks, but this is not a static/dynamic code review service. For that, I can guide you on tooling (e.g., SAST/DAST) or audit your current findings.
23 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
M mattdmcc
Repeat Client

United States
Denis was great at adjusting our focus during a meeting, and shared valuable insights, while enabling me to get working on things myself.
$200-$400
Price
7 days
Duration
D Seller's Response
Helpful?M modi_systems82

United States
A Distinguished Expert in his field, will be working with in the near future. Understood the scope of work and went above the initial ask and delivered in a timely manner and above my expectations
$200-$400
Price
11 days
Duration
D Seller's Response
Helpful?M 
marc_prenty
Repeat Client

New Zealand
Really good experience working with Denis. He was knowledgeable, easy to deal with, and explained things in a clear, practical way. The consultation was very helpful and gave us confidence in our next steps. Highly recommend his services to anyone needing cybersecurity support.
$400-$600
Price
3 days
Duration
D Seller's Response
Helpful?M mattdmcc
Repeat Client

United States
Denis was amazing. Made my complex situation seem doable.
$400-$600
Price
1 day
Duration
D Seller's Response
Helpful?D ddstandpoint

United States
very professional and full if experience
$100-$200
Price
3 days
Duration
D Seller's Response
Helpful?
23 reviews for this Gig
| (23) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
M mattdmcc
Repeat Client

United States
Denis was great at adjusting our focus during a meeting, and shared valuable insights, while enabling me to get working on things myself.
$200-$400
Price
7 days
Duration
D Seller's Response
Helpful?M modi_systems82

United States
A Distinguished Expert in his field, will be working with in the near future. Understood the scope of work and went above the initial ask and delivered in a timely manner and above my expectations
$200-$400
Price
11 days
Duration
D Seller's Response
Helpful?M 
marc_prenty
Repeat Client

New Zealand
Really good experience working with Denis. He was knowledgeable, easy to deal with, and explained things in a clear, practical way. The consultation was very helpful and gave us confidence in our next steps. Highly recommend his services to anyone needing cybersecurity support.
$400-$600
Price
3 days
Duration
D Seller's Response
Helpful?M mattdmcc
Repeat Client

United States
Denis was amazing. Made my complex situation seem doable.
$400-$600
Price
1 day
Duration
D Seller's Response
Helpful?D ddstandpoint

United States
very professional and full if experience
$100-$200
Price
3 days
Duration
D Seller's Response
Helpful?

