About us.

CES is a Waikato civil engineering company with over 40 years of industry expertise. We assist a range of clients in the farming, residential and commercial sectors.

Based in Te Aroha, we service the Matamata-Piako district as well as the wider Waikato region – from Thames-Coromandel and Pokeno in the north and Tūrangi in the south.

We provide quality engineering solutions to suit your project needs; from geotechnical soil testing and surveying, foundation design and inspection to pond testing and stop banks.

A new business

Following a change of ownership, our local experienced team is now supported by Tilsley Engineering Limited, a qualified civil and structural engineering firm based in Pukekohe.

Tilsley Engineering Limited looks forward to increasing the services provided by CES to the wider Waikato area.

Director Robert (Bob) Tilsley is one of the longest-practising chartered professional engineers in New Zealand. He established Tilsley Engineering Limited in 1984.

Bob’s lengthy association with the industry has resulted in close partnerships with other engineers, surveyors and professionals for larger and more complex projects.

Man with herd of cows
Tilsey Engineering Team

Meet the Team.

Supported by team leaders

Bob Tilsley

Principal Engineer

Qualifications/Licences: MNZM, BE Civil, CPEng, MIPENZ

Robert (Bob) Tilsley is a Chartered Professional Engineer with 60 years of experience. He started work at the engineering services department of the Auckland City Council in 1962.

Since that time he has held roles in local government as Assistant County Engineer, Borough Engineer, Chief Executive and an elected member of the Auckland Regional Council. He was an inaugural Board Member of Watercare and has worked in New Zealand and Canada consultancies. He has consulted in the Solomon Islands and New Ireland.

Bob was awarded the MNZM in 2006 for Services to the Community.


Ali Gholamhoseini

Lead Structural Engineer

Qualifications/Licences: BSc, MSc, PhD, FIEAust, CMEngNZ, CPEng(Aus.), CPEng(NZ), IntPE(Aus), IntPE(NZ), APEC Engineer

Industry Awards: Australian Postgraduate Award/Industry (APAI) Scholarship (2010-2014) UNSW, Sydney, Australia

Originally from Iran, Ali completed his BSc in Civil Engineering and MSc in Structural Engineering in 1996 and 1999. He worked in Iran for 10 years before going to Nigeria to work for a German company.

In 2010 Ali moved to Australia to study for his PhD at UNSW. In 2014 he moved to the University of Canterbury for his Post Doc. He has been working on numerous residential, commercial and industrial projects in the Auckland region since 2016. At Tilsley Engineering, Ali enjoys working on a diverse variety of projects on a day-to-day basis.


CES vehicle

Susan Tilsley

Director, Senior Engineering Geologist

Qualifications/Licences: BSc, MSc (Hons), MEngNZ

Susan Tilsley is an engineering geologist with 30 years of experience specialising in geotechnical investigations, earthworks slope instability and landslide assessments – primarily for the design of infrastructure projects.

Susan started work with Geotest Ltd, an engineering soils laboratory in 1993, becoming a lab manager and a TELARC signatory in 1995. She continued working with the Beca Group of companies, becoming an associate (shareholder) in 2010. Between 2013 and 2022 she held the role of Technical Director at Beca Ltd. Her focus in later times was on the technical development of engineering geologists and the improvement of their digital tools.

Susan has worked on projects around New Zealand as well as abroad in South-East Asia and the Pacific. In July 2022 Susan started working with Tilsley Engineering Ltd and Tonkin + Taylor Ltd, both on a part-time basis to enable more time to enjoy other aspects of life.

She is also on the NZ Geotechnical Society committee to update the NZ geotechnical soil and rock field guidelines and has been involved in setting up a country-wide GIS-based slope instability depository.


Our Approach.

Local knowledge: Our local, experienced team contribute valuable experience and insight

Practical, cost-effective solutions: We offer transparent, affordable services to suit a range of projects. We aim to provide a fixed quote so you know the price of our involvement from the start.

Customer care: We are committed to customer satisfaction and are proud to have the support of a number of loyal clients.

In need of quality civil engineering services?
Talk to our team today.

(07) 884 8317 office@teng.co.nz