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Maria Ines Sigui Montenegro

@maina28112012

Procurement professional delivering compliant, high-impact sourcing solutions.

Guatemala
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What I'm looking for

I seek a procurement role where I can lead compliant, high-value sourcing, improve supplier performance, and mentor teams within an international, mission-driven organization.

I am also interested in jobs involving assistance, writing, editing, and translation from English to Spanish or from Spanish to English.

I am a procurement professional with extensive experience leading end-to-end sourcing for international organizations, particularly UNOPS, where I managed purchases of medical equipment, supplies, technology modernization and minor works, prepared bidding documentation, monitored suppliers, and implemented procurement strategies and KPIs.

I have over a decade of administrative and operations experience across UN agencies and international projects, fluency in Spanish and English, working knowledge of German, and hands-on use of systems such as oneUNOPS, eSourcing, CPC and Jira to ensure compliant, efficient contracting and vendor management.

Experience

Work history, roles, and key accomplishments

UNOPS logoUN

Procurement Associate

UNOPS

Apr 2019 - Apr 2024 (5 years)

Implemented procurement strategies and led small- and large-scale procurement processes, coordinated evaluations for INFRAIGSS and AMEDIGSS projects, and managed exceptions and protests within oneUNOPS.

PP

Administrative Assistant

Proyecto Fortalecimiento a la gestión de las Áreas Protegida

Jan 2005 - Dec 2006 (1 year 11 months)

Provided administrative and secretarial support to the director, managing routine office tasks for a conservation project (CONAP).

LC

English Teacher

Liceo Preuniversitario de Computación

Jan 2004 - Dec 2005 (1 year 11 months)

Taught Grammar, Composition and Business English courses, including business correspondence and commercial English for secretaries and accountants.

MS

Administrative Assistant

Marcos, S.A.

Jan 2001 - Dec 2003 (2 years 11 months)

Provided general administrative support across office functions, including documentation and coordination tasks for company operations.

AA

Secretary Receptionist

American Embassy USDA - APHIS

Jan 2000 - Dec 2001 (1 year 11 months)

Performed receptionist and secretarial duties supporting USDA-APHIS embassy operations, handling correspondence and visitor coordination.

Education

Degrees, certifications, and relevant coursework

Chartered Institute of Procurement & Supply logoCS

Chartered Institute of Procurement & Supply

Advanced Certificate, Procurement and Supply

2024 - 2025

CIPS Level 3 Advanced Certificate in Procurement and Supply Operations completed between 2024 and 2025.

Francisco Marroquín University logoFU

Francisco Marroquín University

Bachelor of Business Administration, Business Administration

1999 - 2006

Studied Business Administration at Francisco Marroquín University from 1999 to 2006.

RS

Rosemont School

Certificate, Bilingual Secretary

1995 - 1998

Completed bilingual secretary studies at Rosemont School from 1995 to 1998.

Tech stack

Software and tools used professionally

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Maria Ines Sigui Montenegro - Procurement Officer - UNOPS | Himalayas