{name} is requesting a national interest exception to travel to the US to work for Optum, a subsidiary of UnitedHealth Group. As a senior big data engineer, {name} plays a critical role in designing, developing, and delivering IT operations and deployments that support Optum's healthcare clients. His work with protected health information and personal data requires on-site support. Granting the exception would allow {name} to efficiently perform his important duties and provide technical expertise to ongoing projects in the critical healthcare sector.

1. Client : ASRC Federal Vistronix
•Design and development of Web Applications using HTML5,
CSS3, Javascript, Typescript, JQuery, React, MobX, Bootstrap,
Node JS, ASP.NET Core, MVC, WEB API and SQL Server
2017.
•Develop RESTful Web APIs using C#, ASP.NET, SOAP,
HTTP, REST, JSON, Entity Framework 6 and Swagger for
cross-application solutions.
•Develop, test and deploy code primarily using MS visual
Studio in .NET and C# environment with an emphasis on both
front-end methodologies and server-side programing.
•Develop custom and reusable React JS components using
Forms, Events, Keys, Router, Animations, Props, State, Refs,
Flux and other concepts.
•Worked on MobX for storing state of the Application and
worked with middleware for the MobX-Store.
•Extensively worked with making calls to Web APIs to fetch the
data from the back end as JSON response and parse it on the UI.
•Consumed and Implemented Web APIs using HTTP methods
(GET, PUT, POST, DELETE) to do CRUD operations by
supporting JSON and XML data exchange formats.
•Involve in developing the Business and Data Access Layers

2. using C# object-oriented principles to build flexible, reliable,
and extendable application.
•Write unit-tests using Jest, Enzyme and React Testing Library
for maintaining 100% code coverage.
•Implement customized exception logging framework and alerts
using log4Net.
•Built centralized logging to enable better debugging using ELK
(elastic, Logstash and kibana) and used Kibana Dashboards for
the Application Monitoring.
•Involved in Unit testing and Integration testing of the
application using NUnit framework and Postman.
•Contribute to the development of Section 508 best practices
and standards.
•Create, develop and manage schema objects (such as tables,
views, indexes, complex stored procedures), functions and
triggers & maintaining Referential Integrity.
•Worked on Query optimization techniques to improve the
performance of Queries.
•Perform complex diagnosis of problems, providing solutions
within area of responsibility, and/or through consulting with
team members to resolve system or application issues.
•Coordinate and prioritize application modifications and bug
fixes.
•Collaborate with other Developers, Testers, Scrum Master, PM,
PO, BSA/TSAs in testing, design and development.

3. •Work on SVN for version control, TFS and GIT for code
management.
•Involve in all phases of Software Development Lifecycle
(SDLC) including Requirements Collection, Planning, Analysis,
Development and Customization of the Application through
Agile TDD methodology.
Client : XPO Logistics
Design, build, deploy, maintain and enhance ELK platform
Responsible for Elasticsearch mapping creating, document
indexing, including deploying, managing, and tuning/optimizing
large-scale Elasticsearch clusters.
Manage individual project priorities and deliverables and
communicate progress to internal teams and executives
Work with partner divisions of to drive new ELK platform
capabilities and roadmaps
Develop complex applications that scale high-volume
production quality.
Provided design recommendations and thought leadership to
improved review processes and resolved technical problems.

4. working with product managers to architect the next generatio n
of Workday searches.
Elastic search experience and capacity planning and cluster
maintenance. Continuously looks for ways to improve and sets a
very
high bar in terms of quality.
Configured Logstash: input, filter, output plugins - database,
JMS, log
file sources and elastic search as output
Used Kubernetes to orchestrate the deployment, scaling and
management of Docker Containers.
Created and managed test environment using Docker,
Kubernetes and Vagrant, initiated instances depending upon
development team requirements.
Migrating Elasticsearch from 5.6.0 to 7.6
Separate Java URL's Data from Elasticsearch- 5.6.0 Cluster and
transfer to Elasticsearch-7.6 cluster Using Logstash, Kafka
Maintained changed control and testing process for all
modifications
and Deployments.
Configured alerting rules and setup PagerDuty alerting for
Elasticsearch, Kafka, Zookeeper and different microservices
working with development and QA teams to design Ingestion

5. Pipelines, Integration APIs, and provide Elastic Search
tuning/optimizing based on our application needs.
Used Elasticsearch for powering not only Search but using ELK
stack for logging and monitoring our systems end to end Using
Beats.
1
Date: 07/09/2021
United States Embassy
Non-Immigrant Visa Unit
Re: Travel purpose under National Interest Exception
Dear Sir/Madam:
Please accept this letter requesting a Travel purpose under
National Interest Exception
Interest Exception for {name} for the Technology critical
infrastructure sector. {name} recently traveled to India in order
to
complete necessary H-1B stamping, as well as to get married
and take care of his
parents as multiple family members were affected by COVID-
19. Prior to cancellation,
he had booked return ticket on --, as per Airlines and CDC rules
he went for
RT-PCR test before departure and got Covid 19 detected, so he

6. cancelled his travel
and recovered totally. {name} Marri meets the National Interest
Exception
requirements given his critical role in the Health Insurance
company Independent
Health Association Inc. On behalf of our company, I formally
request that he is allowed
prompt re-admission to the United States. Below is the
necessary information to
process his exception:
• Last name:
• First name: {name}Date of birth:
• Place of birth:
• Country of citizenship:
• Passport number:
• Visa Number and Category:
{name} has been employed at Health Insurance company
Independent Health Association Inc, since April 2020 as a
Applications Administrator.
Independent Health Association Inc is a not-for-profit
organization that provides a range
of health insurance and related products to more than 365,000
members primarily in
western New York (it's licensed in 35 states). IH's plans include
HAS, HMO, POS, PPO,
indemnity, and Medicare Advantage plans. It also provides
dental and vision coverage,
as well as coverage for Medicaid recipients. The firm offers a
variety of community-
based health and fitness programs including it Encompass 65
and Silver Sneakers
wellness programs for seniors. The company's Healthy Options
program helps local
restaurants design healthy menus. {name} serves in a critical

7. role in
the Pharmacy Benefit Dimensions project and administrating
few Critical Health and
Pharmaceuticals Applications. He is a valuable member of
Engineering Department
FreeText
VISA #
2
which is currently at a critical staffing level of employees. Ever
since the beginning of
the COVID-19 pandemic, {name} has additionally been
working as
a Applications Administrator SME on some of the key projects
like, Reveal, Sterling
File Gateway, SAS, Cognos, PBD RX Drug and various other
internal projects.
• Reveal - REVEAL’s Web-based viewer displays PDF files in
their original,
graphically-rich format, or in text format. You can toggle
between views
depending on your preference. This versatility also allows you
to search,
download and print a PDF report or voucher in the format you
desire.
• Sterling File Gateway - The IBM Sterling File Gateway
solution provides an
intelligent, centralized gateway for managing edge-based file
transfers. It

8. enables you to manage large file volumes of any protocol or
format type, and
provides numerous management capabilities, visibility and
transparency.
Under this model IH personnel and systems can be either
Producers or
Consumers depending on the direction of the file transfer, thus
the inbound and
outbound file transfer workflows are joined into one.
• Cognos - Everyone in your organization can use IBM Cognos
BI to view or
create business reports, analyze data, and monitor events and
metrics so that
they can make effective business decisions. IBM Cognos BI
integrates the
following business intelligence activities in one Web-based
solution.
• Splunk - Splunk is a software platform to search, analyze and
visualize the
machine generated data gathered from websites, applications,
sensors, devices
etc. which make up your IT infrastructure in business.
• SAS - SAS is a command-driven software package used for
statistical analysis
and data visualization. It is available only for Windows
operating systems. It is
arguably one of the most widely used statistical software
packages in both
industry and academia.
• PBD RX Drug - Pharmacy Benefit Dimensions® (PBD), a
wholly-owned
subsidiary of Independent Health, helps companies gain greater

9. control over the
prescription drug component of their health care program.
Given {name} level of skills and expertise in driving the
Applications Programming, Independent Health Association, Inc
is experiencing an
undue burden in his absence. This role is important in running
towards to Applications
Production Installations/Upgrades and critical to perform and
validate the Health Care
Applications, some of Production websites will not be
accessible out of the United
States of America. Since I am working from India, I was
restricted to access to
Production’s websites(servers) organization security policies.
{name}
3
{name}qualifies for National Interest Exemption as he is a
Critical Technology Worker
based on the following points (Note: Taken Directly from CISA
Guidelines):
{name} role is critical to the daily operations at, Independent
Health Association, Inc and This role is important in running
towards to Applications
Production Installations/Upgrades and critical to perform and
validate the Health Care
Applications.Therefore, we look forward to the rapid re-
admission of Madhusudhan
Reddy Marri to the United States to resume employment with
Independent Health

10. Association Inc, and we respectfully request that you kindly
extend all due courtesies.
Should you require any further information, please do not
hesitate to contact me at
‘email address:
’ or via phone at .
Date: 08/05/2021
To the Consulate of the United States of America
Re: {Name}- Request for National Interest Exception to
Presidential Proclamation 10199
Dear Sir or Madam,
I, supervisor of {name} and Sr. Manager of the Optum
Technologies, a United Health Group Subsidiary, and the
purpose of this document is to request National Interest
Exception to Presidential Proclamation 10199 for {name} to
travel to United States and provide support towards critical
infrastructure for Health Care Industry
Project Statement and Background:
United Health Group Inc is an American multinational managed
healthcare and insurance company based in Minnetonka,
Minnesota. It offers health care products and insurance services.

11. It is the second largest healthcare company by revenue with
$400.1 billion, and the largest insurance company by net
premiums. UnitedHealth Group provides health care benefits
globally through UnitedHealthcare. UnitedHealthcare serves
individuals and employers, and Medicare and Medicaid
beneficiaries. UnitedHealth Group offers health services
through Optum. Optum serves the global health care
marketplace, including payers, care providers, health systems,
employers, governments, life sciences companies and
consumers.
{name} is currently working from Veridic
Solution
s llc as a Sr. Big Data Engineer. {name} work for Healthcare
client OPTUM subsidiary of UHG (UnitedHealth Group), at
13625 Technology Dr., Eden Prairie, MN 55344, United States.
Being an onsite engineer, he is primarily involved in the design,
development, and delivery of critical IT operations and large-
scale deployments in our HealthCare firm which is providing
critical care for a lot of covid patients and a lot of other
HealthCare clients. Karthik provide enterprise clinical solutions
and operational support for all for their member profile,
benefits, Claims, Financial Data, Engagements and
Communications

12. Activities etc. He also acts as an escalation point of contact for
the client from a clinical operation. He implemented reliable
and secure data pipelines for various business critical
applications such
as CCAT, Provider Education. He built data pipelines which
process both Medicare and Medicaid claims and continued to
build solutions. As part of his work, he deals with PHI
(Protected Health
Information) and PI (Personal Information) which is critical and
cannot work remotely or out of country. He also works with lot
of PHI and PI tables which contain Patient personal information
and Claims information. He even works for building processors
that generate letters, which educates Providers and Health Care
Workers. Keeping the growing needs of healthcare in view
because of the current pandemic – COVID, new Health care
codes are being created and more providers and Health Care
workers needed to be educated with those terminology. He
continuously reviews and refine the clinical architecture to
accommodate the current business requirements.
Below are some of the job duties performed by {name} at
OPTUM

13. · Interacting with multiple teams understanding their business
requirements for designing flexible and common component.
· Build Data Pipelines that process Claims which require
multiple REST API calls and data aggregation from multiple
sources.
· Heavily used Python and Spark for building multiple
applications to process data.
· Validating the source file for Data Integrity and Data
Quality by reading header and trailer information and column
validations.
· Used Hive to do transformations, joins, filter and some pre-
aggregations before storing the data onto HDFS.
· With Data Lake as a source, created an End-to-End pipeline
with Kafka.
· Implemented two different pipelines with Kafka K-Streams
one carrying the JSON formatted data whereas other carrying
the Avro data.
· Worked on transforming the data using K-Streams.
· Implemented Kafka SSL on topics to stop unauthorized access
to Kafka topics.
· Used Sqoop for importing and exporting data from Netezza,
DB2, Oracle into HDFS and Hive.
· Develop code and perform unit testing, source code reviews
and implement all the individual use cases for the project
consistent with the approved design.

14. · Build a Spark Streaming Application to extract incremental
data from Kafka topics and ingest them into HBASE.
· Identify technology stack that best suits client’s analytical
platform and data ingestion layers.
{name} is uniquely qualified for the position of Sr. Big Data
Engineer at client due to his educational background and his
technical skills. Additionally, {name} has vast
knowledge and experience on the application as he is working
on these applications for more than 3 years.
To summarize, {name} was the core team member in the team
and is necessary for him to travel as his onsite presence is
critical to collaborate, design, implement and deliver on the
above-mentioned projects. It is necessary for {name} to travel
as he cannot perform these tasks remotely by impacting
productivity as well as team and product deliverables.
Additionally, the team looks up to his technical expertise and
guidance for most ongoing projects which becomes difficult due
to the time difference.
Looking at the criticality and complexity of the enhancements, a

15. person at client side is needed who is Performance engineering
planning, strategy implementation and is aware of its process,
who can provide solution to real time business issues with great
responsibility.
In Order for {name} to efficiently perform his work, request
you to grant National Interest Exception to Presidential
Proclamation 10199 so that he can travel to United States and
provide support towards Critical IT Infrastructure sector.
We thank you for your time and careful review of this very
important matter. If you require any further information, please
don’t hesitate us to contact us.
Sincerely,
Corporate Office | 1775 Tysons Blvd | Tysons, Virginia 22102
t+ 1.703.245-4594| f+ 1.703.991-5531 | www.dxc.technology