STS Geotechnics

The Specialists
Behind Every
Project.

Our multidisciplinary team brings together geotechnical engineers, environmental professionals, drilling specialists, laboratory professionals and project support staff. Working as one coordinated team, we provide practical insight, reliable information and responsive support throughout the project lifecycle

Group Leadership
Mrigesh Tamang

Mrigesh Tamang

General Manager | Principal Geotechnical Engineer
BE (Civil), ME (Geotechnical), MIEAust, CPEng, NER, APEC Engineer, IntPE(Aust), RPEQ

Mrigesh is the General Manager of the STS Group, incorporating STS Geotechnics and GeoSense Drilling. He leads the strategic direction and overall operations of the group, strengthening its integrated model combining geotechnical engineering, environmental, and investigation capabilities.

Technical Leadership Team
3 engineers
James Zhao

James Zhao

Geotechnical Engineer | Drilling Specialist
Bachelor Degree in Civil Engineering

James is the founder of GeoSense Drilling and oversees drilling operations within the STS Group. With extensive experience in geotechnical engineering investigations and drilling delivery, he plays a key role in maintaining the in-house field capability that supports STS's services.

Masoud Haghparast

Masoud Haghparast

Engineering Manager | PhD, MEng, BE
Ph.D

Masoud leads engineering delivery and supports technical quality across STS Group’s geotechnical projects. His experience includes site investigation, geotechnical interpretation, laboratory and field data assessment, slope stability, foundation engineering and finite element analysis. He works with project teams to turn complex ground information into practical and defensible engineering advice.

Laurie Ihnativ

Laurie Ihnativ

Senior Principal Geotechnical Engineer
BE (Civil Engineering), MEngSc (Geotechnical Engineering), FIEAust

Laurie is a highly experienced geotechnical engineer who provides technical review, mentoring and practical project advice across a broad range of ground engineering assignments. His contribution spans investigation planning, interpretation, foundations, earthworks, construction support and geotechnical risk management, strengthening both project outcomes and the capability of the wider STS team. Laurie has been with STS Geotechnics for more than 35 years. He has played a key role in both technical delivery and operational development, contributing significantly to the stability and long-term growth of the business.

One Integrated Team

STS Group connects consulting, field investigation, drilling and laboratory capability through one coordinated delivery model. Our professionals work across disciplines to reduce handover gaps, improve communication and provide clients with clearer information from investigation planning through reporting and construction support.
Careers at STS

Grow Your Career
with STS Group.

We are always interested in capable people who want to build their careers through meaningful technical work, practical field experience and genuine responsibility.

Whether your background is in engineering, environmental science, drilling, laboratory testing, project delivery or business support, STS Group offers the opportunity to learn from experienced professionals, contribute to varied projects and make a visible impact from day one.

We value curiosity, accountability, teamwork and people who take pride in the quality of their work.

Send Your CV
Professional development
Structured mentoring, technical guidance and support toward relevant professional recognition.
Varied project exposure
Work across development, construction, infrastructure, industrial and government projects.
Field experience that matters
Build practical understanding by connecting site observations, testing and data with real project decisions.
Flexible, accountable working
Flexible arrangements are available where suitable, supported by clear expectations and a focus on outcomes.

Talk to Our Team About
Your Project.

Tell us what you are planning, what information you need and where the project is located. We will connect you with the right technical or project specialist for the next step.

Send an Enquiry +61 2 9756 2166