Congero, v. (kon-JER-ō) {Latin}

to bring together, compile, accumulate

Why Congero?

Working with Congero Technology Group

At Congero Technology Group, we combine cutting-edge ideas with proven dependability.

We understand that no two businesses are alike, we’ve built a diverse team of 35 team members from around the world. When our team is on site, we have one mission: to deliver a unique billing solution that increases revenue for your company.

Our process is transparent, and we’re honest about what works and what doesn’t. We know every member of your team is critical to understanding your business needs, and we treat them that way—from the CEO to the administrative assistant.

When you work with Congero Technology Group, your team becomes our team. Your goals become our goals. And our successes become yours.

Team Members



Years in Business


Our international headquarters

Reston, USA

Toronto, Canada

Queretaro, Mexico

Bangalore, India

San Jose, Costa Rica

Our Story

Over the Years


Thomas Cong left Portal Software and started an independent consulting business for customers such as GM Onstar and Sirius XM


Oracle acquired Portal Software and renamed it Oracle Billing and Revenue Management


Ebillsoft incorporated in Fairfax VA by Thomas Cong and Jorgen Jensen. Ebillsoft became Oracle Gold Partner and started delivering BRM implementation services. 


Ebillsoft started business in Canada


We recognized the need for cloud-based solutions Ebillsoft embarked on BRMbox cloud billing platform based on Oracle BRM


We opened our first R&D center in Bangalore India


Ebillsoft Mexico opened our first office in Latin America


We re-launched as Congero Technology Group


Congero started a consulting delivery team in Costa Rica

the team

Meet our team members

Thomas Cong

President & CEO

Mr. Cong has more than 17 years of experience in application design and development, enterprise systems integration and consulting. He possesses strong knowledge and hands-on experience of enterprise platform technologies including CRM, billing & revenue management, Java enterprise systems. As a dedicated team player with strong communications skills, he has track records to take on leadership role in challenging projects to achieve customer total satisfaction.

Kamal Bhasin

Vice President of Strategy and Delivery Management

Kamal Bhasin graduated with his MCA in Computer Science and Applications from South Gurjarat University. After college, Bhasin went on to be a Solutions Architect for well-known software companies such as Oracle, Portal Software, and Cisco. He joined the Congero Technology Group as a Consultant in 2012. Now, Vice President of Strategy and Delivery Management, Kamal is responsible for the strategic direction of the Congero Cloud and the Consulting efforts of the Congero Technology Group. Kamal delivers the highest quality success for our clients.


Sr. Principal Consultant

After graduating with a Ph.D. degree from Washington University in St. Louis, Michael started working in both scientific and industrial computing. He accumulated many years of experience in the full life cycle of enterprise software architecting, design and development.

Manikandan Sekar

Principal Cloud Architect

Manikandan is versatile software engineer who primarily works on cloud operations and devOps for Congero. He also has more than 13 years of billing domain experience and specializes in architecting cloud friendly microservices.

Federico Piazza

Sr Principal Consultant

Federico is a Java Senior Software Engineer with 14 years experience in backends. He is passionate about distributed systems, software architecture, event oriented systems, microservices and technology. In his free time, he enjoys sailing, kayaking, scuba diving and outdoor activities

Alexander Salazar

Delivery Lead, LATAM

Graduated with an Electrical Engineer degree, Alex has experience in software development and solution architecture after working for Oracle and joining Congero Technology in 2018. In his free time, he enjoys reading, doing martial arts and obtaining knowledge through acquiring new certifications.

Minh Phanivong

Sr Principal Consultant

Minh Phanivong is a principal IT Consultant with extensive experience in Team Lead, Architecture, Requirements, Analysis, Design, Development, Testing, and Implementation. Over the course of his career, Minh has completed extensive work on Oracle BRM, Kenan and Amdocs billing platforms.

Marilyn Miranda

Technical Consultant

Marilyn is a graduate in Systems Engineering from Universidad de Costa Rica. She also has a degree (licenciatura) in Computing Engineering from Universidad Estatal a Distancia of Costa Rica. In recent years, she has been dedicated to web development and is very interested on the area of testing software (QA).

Alexander Bramford

Principal Consultant

Alex started his career in the digital typesetting and pharmaceuticals ERP worlds and has worked as billing consultant in the Telecoms and Finance industries since the early 00’s. He brings a wealth of experience in integrating billing systems to third-party payment processing and taxation vendors.

Sanchit Sharma

Delivery Lead, North America

Sanchit has over 17 years of experience in Technology with successful record of delivering large enterprise projects. He is passionate about Cloud architecture, microservices, event driven architecture and Big data technologies. Besides work, he spends time with family outdoor, runs and plays tennis.

Saray Mora

QA Analyst

Saray graduated in Systems Engineering at Universidad Nacional de Costa Rica.
She has experience in supporting systems for TelCom and enjoys learning about new technologies.

Roberto Castro

Sr Consultant

Working remotely from our team in Costa Rica, Roberto enjoys pushing himself to new challenges and learning new technologies. He enjoys nature and learning new things every day.

Randal Vargas

Sr Consultant

Graduated from University of Costa Rica in 2013, Randal started his professional career as developer on Oracle CRM (Siebel) working as part of a team and individual tasks. Over the years, he had different roles as analyst and deployer, integrations with different applications (like IBM-MQ, AIA and BRM). 

Adrian Rocha

Tech Lead, LATAM

Adrian has broad experience in business supporting systems for telecom and financial companies. He led development teams and designed architecture solutions in different projects in Latin America, Europe and the U.S. Adrian holds a BS in Information Systems, and is pursuing an MBA at the University of Barcelona.

Sharon Solano


As somone who has strong passion for her field, Sharon is working full time while pursuing a Business Administration degree. She pushes daily to improve herself professionally and is strongly motivated by her dreams and goals. Her hobbies include traveling, photography, reading and spending time with loved ones.

Quyen Dao

Finance/Payroll Lead

Quyen joined the Congero Technology Group in 2016. Along with the growth and development of the company, Quyen has accumulated a lot of experience and knowledge to utilize in her career field. Quyen is responsible for all areas of finance and administration including payroll, benefits, accounts payable and receivables, general ledger, banking, and reconciliations. In her free time, Quyen likes to hike, bike, and swim with her family and friends.

Prasad Gali

Principal Consultant

Graduated from JNTU University, Hyderabad, India, Prasad has over 14 years of experience in design, development and architecting in OSS, middleware and Big Data domain. Worked in various applications (OSM, ASAP and AIA) related to Oracle Communications suite and Big Data technologies.

Guillermo Romero Brenes

QA Consultant

“I’m a person who likes to learn about new technologies that help me to do better my work, I like to learn about everything that knows my coworkers that I can apply in my daily and think teamwork is really important to have a good work environment and to finish the project correctly.”

Tina Huynh

Digital Marketing Specialist

Graduated summa cum laude with a Bachlor’s in Mass Communication, Tina started her career in marketing with Congero Technology Group. She is experienced with Adobe CC, website design and blog writing. In her free time, she enjoys playing table tennis, guitar and trying new Vietnamese recipes.

Maria Cortes

QA Junior

I belong to a network of girls in technology called TIC-as, it is a project led by Cooperativa Sulá Batsú, it works with the economic support of the Fund for Gender Equality of UN-Women, the objective is to create employment conditions for women in the ICT sector in Costa Rica,  we also develop Female Hackathons. 

Apart from my technological training, I enjoy painting, drawing and learning to play the guitar.

Ericka Solorzano

Sr Consultant

“I can define myself as a proactive, committed and responsable person. I also have a high sense of urgency, I can define priorities on my task and work on that. My goal is to provide quality communication, work and professionalism, along with excellent collaboration & team building skills with proficiency in grasping new technical concepts quickly & utilizing the same in a productive manner”.

Saikat Sen

Principal Consultant

Graduated with Computer Science engineering from WBUT, India, Saikat is an Oracle certified specialist with more than 11 years of experience in design, implementation, analysis and development in Oracle BRM. He likes to lead projects from concept through release process. His favorite pass-times include playing cricket, badminton and chess.

Phien-An Nguyen

Cloud Infrastructure Engineer

Phien-An is passionate about making everything in the cloud work right. He enjoys riding bike or his big truck in his free time.

Daniel Vargas

QA Engineer

Graduated at Universidad Nacional de Costa Rica with a magister degree in IT, Daniel is a person who loves to learn about new technologies. He has experience working as a Developer in Siebel CRM, he also has experience in QA area working with difference tools (like Siebel CRM, AIA and Oracle BRM).

Frida Xirinachs

Technical Consultant

Recently graduated in Business Informatics from the University of Costa Rica, Frida joined Congero Technology Group as a Technical Consultant in 2020. Her work is directly related to Oracle Billing and Revenue Management.

Jose peralta

Technical Consultant

Jose graduated from the National University of Costa Rica in 2016. He has been working as a Software Engineer and other roles before getting his opportunity at Congero Technology Group. He is passionate about drawing, reading and learning about new technologies.

Francisco Herrera

Director of Business Development in Latin America

Francisco is a Cybernetics and Computer Engineer with 31 years of experience in the LATAM IT market. He is passionate about sales, marketing and technology, and is certified in three different methodologies of Consultative Selling.

Daniel Vargas

QA Engineer

Graduated at Universidad Nacional de Costa Rica with a magister degree in IT, Daniel is a person who loves to learn about new technologies. He has experience working as a Developer in Siebel CRM, he also has experience in QA area working with difference tools (like Siebel CRM, AIA and Oracle BRM).